feat: enhance Shop PO handling with discount scheme support and free issue tracking

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Distribution.Tests/Services/NotificationServiceTests.cs

@@ -0,0 +1,209 @@
+using Distribution.Features.Notifications;
+using Distribution.Infra.UoW;
+using Microsoft.AspNetCore.SignalR;
+using Microsoft.Extensions.Logging.Abstractions;
+using Moq;
+using Xunit;
+
+namespace Distribution.Tests.Services;
+
+public class NotificationServiceTests
+{
+    private readonly Mock<INotificationRepository> _repo = new();
+    private readonly Mock<IUnitOfWork> _uow = new();
+    private readonly Mock<IHubContext<NotificationHub>> _hub = new();
+    private readonly Mock<IHubClients> _clients = new();
+    private readonly Mock<IClientProxy> _proxy = new();
+    private readonly NotificationService _sut;
+
+    public NotificationServiceTests()
+    {
+        _repo.Setup(r => r.FilterActiveUserIdsAsync(It.IsAny<IEnumerable<Guid>>()))
+            .ReturnsAsync((IEnumerable<Guid> ids) => ids.ToList());
+        _hub.SetupGet(h => h.Clients).Returns(_clients.Object);
+        _clients.Setup(c => c.User(It.IsAny<string>())).Returns(_proxy.Object);
+
+        _sut = new NotificationService(
+            _repo.Object,
+            new NotificationRecipientResolver(_repo.Object),
+            _hub.Object,
+            _uow.Object,
+            NullLogger<NotificationService>.Instance);
+    }
+
+    private static NotificationArgs Args(Guid? actor = null) =>
+        new(new { StoreName = "Fort Mini Mart" }, "DeliveryTask", Guid.NewGuid(), "/operations/delivery-tasks/1", actor);
+
+    // Registry
+
+    [Fact]
+    public void EveryNotificationTypeConstant_HasADefinition()
+    {
+        var constants = typeof(NotificationTypes)
+            .GetFields()
+            .Where(f => f.IsLiteral && f.FieldType == typeof(string))
+            .Select(f => (string)f.GetRawConstantValue()!)
+            .ToList();
+
+        Assert.NotEmpty(constants);
+        Assert.Equal(constants.Count, constants.Distinct().Count());
+        Assert.All(constants, c => Assert.True(NotificationTypes.All.ContainsKey(c), $"{c} has no definition"));
+    }
+
+    // NotifyAsync
+
+    [Fact]
+    public async Task NotifyAsync_DoesNothing_WhenTypeIsNotRegistered()
+    {
+        await _sut.NotifyAsync("NotARealType", [RecipientRule.Users(Guid.NewGuid())], Args());
+
+        _repo.Verify(r => r.AddAsync(It.IsAny<Models.Notification>()), Times.Never);
+        _uow.Verify(u => u.CommitAsync(It.IsAny<CancellationToken>()), Times.Never);
+    }
+
+    [Fact]
+    public async Task NotifyAsync_DoesNothing_WhenThereAreNoRecipients()
+    {
+        await _sut.NotifyAsync(NotificationTypes.DeliveryTaskFailed, [RecipientRule.Users()], Args());
+
+        _repo.Verify(r => r.AddAsync(It.IsAny<Models.Notification>()), Times.Never);
+    }
+
+    [Fact]
+    public async Task NotifyAsync_ExcludesTheActingUser()
+    {
+        var actor = Guid.NewGuid();
+        var other = Guid.NewGuid();
+        Models.Notification? saved = null;
+        _repo.Setup(r => r.AddAsync(It.IsAny<Models.Notification>()))
+            .Callback<Models.Notification>(n => saved = n)
+            .Returns(Task.CompletedTask);
+
+        await _sut.NotifyAsync(NotificationTypes.DeliveryTaskFailed,
+            [RecipientRule.Users(actor, other)], Args(actor));
+
+        Assert.NotNull(saved);
+        var recipient = Assert.Single(saved!.Recipients);
+        Assert.Equal(other, recipient.FK_UserId);
+    }
+
+    [Fact]
+    public async Task NotifyAsync_RendersTemplate_CommitsAndPushesToEachRecipient()
+    {
+        var a = Guid.NewGuid();
+        var b = Guid.NewGuid();
+        Models.Notification? saved = null;
+        _repo.Setup(r => r.AddAsync(It.IsAny<Models.Notification>()))
+            .Callback<Models.Notification>(n => saved = n)
+            .Returns(Task.CompletedTask);
+
+        await _sut.NotifyAsync(NotificationTypes.DeliveryTaskFailed, [RecipientRule.Users(a, b)], Args());
+
+        Assert.Equal("Delivery to Fort Mini Mart failed.", saved!.Message);
+        Assert.Equal(Models.NotificationSeverity.Warning, saved.Severity);
+        _uow.Verify(u => u.CommitAsync(It.IsAny<CancellationToken>()), Times.Once);
+        _clients.Verify(c => c.User(a.ToString()), Times.Once);
+        _clients.Verify(c => c.User(b.ToString()), Times.Once);
+        _proxy.Verify(p => p.SendCoreAsync(NotificationHub.ClientEvent,
+            It.IsAny<object?[]>(), It.IsAny<CancellationToken>()), Times.Exactly(2));
+    }
+
+    [Fact]
+    public async Task NotifyAsync_DoesNotThrow_WhenSavingFails_AndDiscardsTheEntity()
+    {
+        _uow.Setup(u => u.CommitAsync(It.IsAny<CancellationToken>())).ThrowsAsync(new InvalidOperationException("db down"));
+
+        var ex = await Record.ExceptionAsync(() =>
+            _sut.NotifyAsync(NotificationTypes.DeliveryTaskFailed, [RecipientRule.Users(Guid.NewGuid())], Args()));
+
+        Assert.Null(ex);
+        _repo.Verify(r => r.Discard(It.IsAny<Models.Notification>()), Times.Once);
+        _proxy.Verify(p => p.SendCoreAsync(It.IsAny<string>(), It.IsAny<object?[]>(), It.IsAny<CancellationToken>()), Times.Never);
+    }
+
+    [Fact]
+    public async Task NotifyAsync_DoesNotThrow_WhenPushFails_AndKeepsTheSavedNotification()
+    {
+        _proxy.Setup(p => p.SendCoreAsync(It.IsAny<string>(), It.IsAny<object?[]>(), It.IsAny<CancellationToken>()))
+            .ThrowsAsync(new InvalidOperationException("socket gone"));
+
+        var ex = await Record.ExceptionAsync(() =>
+            _sut.NotifyAsync(NotificationTypes.DeliveryTaskFailed, [RecipientRule.Users(Guid.NewGuid())], Args()));
+
+        Assert.Null(ex);
+        _uow.Verify(u => u.CommitAsync(It.IsAny<CancellationToken>()), Times.Once);
+        _repo.Verify(r => r.Discard(It.IsAny<Models.Notification>()), Times.Never);
+    }
+
+    // Recipient rules
+
+    [Fact]
+    public async Task PermissionInScope_ResolvesToTheIntersectionOfPermissionAndScope()
+    {
+        var both = Guid.NewGuid();
+        var permissionOnly = Guid.NewGuid();
+        var scopeOnly = Guid.NewGuid();
+        var storeId = Guid.NewGuid();
+        _repo.Setup(r => r.GetUserIdsByPermissionAsync("store.manage")).ReturnsAsync([both, permissionOnly]);
+        _repo.Setup(r => r.GetUserIdsByScopeAsync(ScopeKind.Store, storeId)).ReturnsAsync([both, scopeOnly]);
+
+        var ids = await new NotificationRecipientResolver(_repo.Object)
+            .ResolveAsync([RecipientRule.PermissionInScope("store.manage", ScopeKind.Store, storeId)], actingUserId: null);
+
+        Assert.Equal([both], ids);
+    }
+
+    [Fact]
+    public async Task ReportsTo_ResolvesToTheSupervisor_AndIsEmptyWhenThereIsNone()
+    {
+        var user = Guid.NewGuid();
+        var supervisor = Guid.NewGuid();
+        var resolver = new NotificationRecipientResolver(_repo.Object);
+
+        _repo.Setup(r => r.GetReportsToUserIdAsync(user)).ReturnsAsync(supervisor);
+        Assert.Equal([supervisor], await resolver.ResolveAsync([RecipientRule.ReportsTo(user)], null));
+
+        _repo.Setup(r => r.GetReportsToUserIdAsync(user)).ReturnsAsync((Guid?)null);
+        Assert.Empty(await resolver.ResolveAsync([RecipientRule.ReportsTo(user)], null));
+    }
+
+    [Fact]
+    public async Task RouteOwner_ResolvesToTheOwner_AndIsEmptyWhenTheRouteHasNone()
+    {
+        var storeId = Guid.NewGuid();
+        var owner = Guid.NewGuid();
+        var resolver = new NotificationRecipientResolver(_repo.Object);
+
+        _repo.Setup(r => r.GetRouteOwnerUserIdAsync(ScopeKind.Store, storeId)).ReturnsAsync(owner);
+        Assert.Equal([owner], await resolver.ResolveAsync([RecipientRule.RouteOwner(ScopeKind.Store, storeId)], null));
+
+        _repo.Setup(r => r.GetRouteOwnerUserIdAsync(ScopeKind.Store, storeId)).ReturnsAsync((Guid?)null);
+        Assert.Empty(await resolver.ResolveAsync([RecipientRule.RouteOwner(ScopeKind.Store, storeId)], null));
+    }
+
+    [Fact]
+    public async Task OptionalTokenAtTheEndOfATemplate_LeavesNoTrailingSpace()
+    {
+        Models.Notification? saved = null;
+        _repo.Setup(r => r.AddAsync(It.IsAny<Models.Notification>()))
+            .Callback<Models.Notification>(n => saved = n)
+            .Returns(Task.CompletedTask);
+
+        await _sut.NotifyAsync(NotificationTypes.DeliveryTaskFailed, [RecipientRule.Users(Guid.NewGuid())],
+            new NotificationArgs(new { StoreName = "Fort Mini Mart", Note = (string?)null }, "DeliveryTask", Guid.NewGuid(), "/x"));
+
+        Assert.Equal("Delivery to Fort Mini Mart failed.", saved!.Message);
+    }
+
+    [Fact]
+    public async Task Resolve_DeduplicatesUsersAcrossRules()
+    {
+        var user = Guid.NewGuid();
+        _repo.Setup(r => r.GetUserIdsByPermissionAsync("stock.manage")).ReturnsAsync([user]);
+
+        var ids = await new NotificationRecipientResolver(_repo.Object)
+            .ResolveAsync([RecipientRule.Users(user), RecipientRule.Permission("stock.manage")], null);
+
+        Assert.Equal([user], ids);
+    }
+}

Distribution/Data/AppDBContext.cs

@@ -22,6 +22,9 @@ public class AppDBContext(DbContextOptions<AppDBContext> options) : DbContext(op
     public DbSet<ShopPO> ShopPOs { get; set; }
     public DbSet<ShopPOItem> ShopPOItems { get; set; }
     public DbSet<Invoice> Invoices { get; set; }
+    public DbSet<InvoiceItem> InvoiceItems { get; set; }
+    public DbSet<InvoiceVersion> InvoiceVersions { get; set; }
+    public DbSet<InvoiceVersionItem> InvoiceVersionItems { get; set; }
     public DbSet<LoadingSheetOrder> LoadingSheetOrders { get; set; }
     public DbSet<DeliveryRun> DeliveryRuns { get; set; }
     public DbSet<User> Users { get; set; }
@@ -71,6 +74,8 @@ public class AppDBContext(DbContextOptions<AppDBContext> options) : DbContext(op
     public DbSet<ReceivedCheque> ReceivedCheques { get; set; }
     public DbSet<SupplierPayment> SupplierPayments { get; set; }
     public DbSet<SupplierPaymentGRN> SupplierPaymentGRNs { get; set; }
+    public DbSet<Notification> Notifications { get; set; }
+    public DbSet<NotificationRecipient> NotificationRecipients { get; set; }
     public DbSet<StoreCreditMovement> StoreCreditMovements { get; set; }
 
     protected override void OnModelCreating(ModelBuilder modelBuilder)
@@ -173,6 +178,54 @@ public class AppDBContext(DbContextOptions<AppDBContext> options) : DbContext(op
             .HasForeignKey(i => i.FK_ShopPOId)
             .OnDelete(DeleteBehavior.Restrict);
 
+        modelBuilder.Entity<InvoiceItem>()
+            .HasOne(i => i.Invoice)
+            .WithMany(inv => inv.Items)
+            .HasForeignKey(i => i.FK_InvoiceId)
+            .OnDelete(DeleteBehavior.Restrict);
+
+        modelBuilder.Entity<InvoiceItem>()
+            .HasOne(i => i.ShopPOItem)
+            .WithMany()
+            .HasForeignKey(i => i.FK_ShopPOItemId)
+            .OnDelete(DeleteBehavior.Restrict)
+            .IsRequired(false);
+
+        modelBuilder.Entity<InvoiceItem>()
+            .HasOne(i => i.Item)
+            .WithMany()
+            .HasForeignKey(i => i.FK_ItemId)
+            .OnDelete(DeleteBehavior.Restrict);
+
+        modelBuilder.Entity<InvoiceVersion>()
+            .HasOne(v => v.Invoice)
+            .WithMany()
+            .HasForeignKey(v => v.FK_InvoiceId)
+            .OnDelete(DeleteBehavior.Restrict);
+
+        modelBuilder.Entity<InvoiceVersion>()
+            .HasIndex(v => new { v.FK_InvoiceId, v.VersionNumber })
+            .IsUnique();
+
+        modelBuilder.Entity<InvoiceVersionItem>()
+            .HasOne(i => i.InvoiceVersion)
+            .WithMany(v => v.Items)
+            .HasForeignKey(i => i.FK_InvoiceVersionId)
+            .OnDelete(DeleteBehavior.Restrict);
+
+        modelBuilder.Entity<InvoiceVersionItem>()
+            .HasOne(i => i.ShopPOItem)
+            .WithMany()
+            .HasForeignKey(i => i.FK_ShopPOItemId)
+            .OnDelete(DeleteBehavior.Restrict)
+            .IsRequired(false);
+
+        modelBuilder.Entity<InvoiceVersionItem>()
+            .HasOne(i => i.Item)
+            .WithMany()
+            .HasForeignKey(i => i.FK_ItemId)
+            .OnDelete(DeleteBehavior.Restrict);
+
         modelBuilder.Entity<Invoice>()
             .HasMany(i => i.Payments)
             .WithOne(p => p.Invoice)
@@ -708,6 +761,30 @@ public class AppDBContext(DbContextOptions<AppDBContext> options) : DbContext(op
         modelBuilder.Entity<SupplierPaymentGRN>()
             .HasIndex(a => a.FK_GoodsReceiptId);
 
+        // --- Notifications ---
+
+        modelBuilder.Entity<Notification>()
+            .HasIndex(n => new { n.EntityType, n.EntityId });
+
+        modelBuilder.Entity<NotificationRecipient>()
+            .HasOne(r => r.Notification)
+            .WithMany(n => n.Recipients)
+            .HasForeignKey(r => r.FK_NotificationId)
+            .OnDelete(DeleteBehavior.Cascade);
+
+        modelBuilder.Entity<NotificationRecipient>()
+            .HasOne(r => r.User)
+            .WithMany()
+            .HasForeignKey(r => r.FK_UserId)
+            .OnDelete(DeleteBehavior.Cascade);
+
+        modelBuilder.Entity<NotificationRecipient>()
+            .HasIndex(r => new { r.FK_UserId, r.IsRead });
+
+        modelBuilder.Entity<NotificationRecipient>()
+            .HasIndex(r => new { r.FK_NotificationId, r.FK_UserId })
+            .IsUnique();
+
         // --- StoreCreditMovement ---
 
         modelBuilder.Entity<StoreCreditMovement>()

Distribution/Features/DashboardReport/DashboardReportDTOs.cs

@@ -2,21 +2,27 @@ namespace Distribution.Features.DashboardReport;
 
 public record DashboardFilter(DateTime From, DateTime To, Guid? RegionId, Guid? CategoryId, Guid? WarehouseId);
 
-public record SalesTotals(decimal GrossSales, decimal ReturnValue, int Orders, decimal CostedSales, decimal CostOfSales);
+public record SalesTotals(decimal GrossSales, decimal ReturnValue, decimal Discounts, int Orders, decimal CostedSales, decimal CostOfSales);
 
 public record SalesKpis(
-    decimal GrossSales, decimal ReturnValue, decimal NetSales, int Orders, decimal AverageOrderValue,
+    decimal GrossSales, decimal ReturnValue, decimal Discounts, decimal NetSales, int Orders, decimal AverageOrderValue,
     decimal GrossProfit, decimal? GrossProfitMarginPercent);
 
 public record SalesKpiComparison(SalesKpis Current, SalesKpis Previous, DateTime PreviousFrom, DateTime PreviousTo);
 
+public record ReceivablesTotals(decimal Collected, decimal Outstanding, decimal Overdue);
+
+public record CashKpis(decimal Collected, decimal Outstanding, decimal Overdue, decimal? CollectionRatePercent);
+
+public record CashKpiComparison(CashKpis Current, CashKpis Previous);
+
 public record TrendPoint(string Period, decimal Sales, decimal Returns);
 
 public record NamedAmount(Guid? Id, string Name, decimal Amount);
 
 public record SalesSummaryResponse(
     DateTime From, DateTime To, string Granularity,
-    SalesKpiComparison Kpis, List<TrendPoint> Trend,
+    SalesKpiComparison Kpis, CashKpiComparison Cash, List<TrendPoint> Trend,
     List<NamedAmount> ByCategory, List<NamedAmount> ByRegion, List<NamedAmount> ByRep);
 
 public record PeriodAmount(DateTime Date, decimal Amount);

Distribution/Features/DashboardReport/DashboardReportRepository.cs

@@ -19,29 +19,30 @@ public class DashboardReportRepository(AppDBContext db) : IDashboardReportReposi
         public Guid RepId { get; set; }
     }
 
-    // Same definition of "sold" as ProductReportRepository: fulfilled lines on non-cancelled POs
-    // whose invoice is Finalized, dated by Invoice.FinalizedAt. 'To' is inclusive (whole day).
+    // Same definition of "sold" as ProductReportRepository: billable (non-removed) invoice lines of
+    // Finalized invoices on non-cancelled POs, dated by Invoice.FinalizedAt. 'To' is inclusive (whole day).
+    // Payment status/method is deliberately ignored: a sale is recognised when invoiced.
     private IQueryable<SoldLine> SoldLines(DashboardFilter f)
     {
         var start = f.From.Date;
         var end = f.To.Date.AddDays(1);
         var q =
-            from li in db.ShopPOItems.AsNoTracking()
-            join inv in db.Invoices.AsNoTracking() on li.FK_ShopPOId equals inv.FK_ShopPOId
-            where inv.Status == InvoiceStatus.Finalized
-                && li.ShopPO.Status != ShopPOStatus.Cancelled
-                && inv.FinalizedAt >= start && inv.FinalizedAt < end
+            from li in db.InvoiceItems.AsNoTracking()
+            where li.IsActive && !li.IsRemoved
+                && li.Invoice.Status == InvoiceStatus.Finalized
+                && li.Invoice.ShopPO.Status != ShopPOStatus.Cancelled
+                && li.Invoice.FinalizedAt >= start && li.Invoice.FinalizedAt < end
             select new SoldLine
             {
-                Date = inv.FinalizedAt!.Value.Date,
-                PoId = li.FK_ShopPOId,
-                Value = li.QuantityFulfilled * li.UnitPrice,
-                Cost = li.Item.CostPrice == null ? null : li.QuantityFulfilled * li.Item.CostPrice,
+                Date = li.Invoice.FinalizedAt!.Value.Date,
+                PoId = li.Invoice.FK_ShopPOId,
+                Value = li.Quantity * li.UnitPrice,
+                Cost = li.Item.CostPrice == null ? null : li.Quantity * li.Item.CostPrice,
                 CategoryId = li.Item.FK_CategoryId,
                 CategoryName = li.Item.Category.Name,
-                RegionId = li.ShopPO.Store.Route.FK_RegionId,
-                RegionName = li.ShopPO.Store.Route.Region.Name,
-                RepId = li.ShopPO.RaisedById,
+                RegionId = li.Invoice.ShopPO.Store.Route.FK_RegionId,
+                RegionName = li.Invoice.ShopPO.Store.Route.Region.Name,
+                RepId = li.Invoice.ShopPO.RaisedById,
             };
         if (f.RegionId.HasValue) q = q.Where(l => l.RegionId == f.RegionId.Value);
         if (f.CategoryId.HasValue) q = q.Where(l => l.CategoryId == f.CategoryId.Value);
@@ -52,8 +53,10 @@ public class DashboardReportRepository(AppDBContext db) : IDashboardReportReposi
     {
         var start = f.From.Date;
         var end = f.To.Date.AddDays(1);
+        // Only credit-deduction returns reduce sales; an item exchange is replaced like-for-like (net zero).
         var q = db.SaleReturnItems.AsNoTracking()
-            .Where(r => r.SaleReturn.CreatedAt >= start && r.SaleReturn.CreatedAt < end);
+            .Where(r => r.SaleReturn.CreatedAt >= start && r.SaleReturn.CreatedAt < end
+                && r.SaleReturn.Mode == ReturnMode.CreditDeduction);
         if (f.RegionId.HasValue) q = q.Where(r => r.SaleReturn.ShopPO.Store.Route.FK_RegionId == f.RegionId.Value);
         if (f.CategoryId.HasValue) q = q.Where(r => r.Item.FK_CategoryId == f.CategoryId.Value);
         return q;
@@ -68,7 +71,59 @@ public class DashboardReportRepository(AppDBContext db) : IDashboardReportReposi
         var costedSales = await costed.SumAsync(l => (decimal?)l.Value) ?? 0m;
         var cost = await costed.SumAsync(l => l.Cost) ?? 0m;
         var returns = await ReturnLines(f).SumAsync(r => (decimal?)(r.Quantity * r.UnitPrice)) ?? 0m;
-        return new SalesTotals(gross, returns, orders, costedSales, cost);
+        return new SalesTotals(gross, returns, await GetDiscountsAsync(f), orders, costedSales, cost);
+    }
+
+    // Discount carried on the invoice (Invoice.DiscountAmount) for invoices finalized in the range, same dating as sales.
+    // A discount belongs to the whole invoice, so it can't be split by category: with a category filter it is 0.
+    private async Task<decimal> GetDiscountsAsync(DashboardFilter f)
+    {
+        if (f.CategoryId.HasValue) return 0m;
+        var start = f.From.Date;
+        var end = f.To.Date.AddDays(1);
+        var q = db.Invoices.AsNoTracking()
+            .Where(i => i.IsActive && i.Status == InvoiceStatus.Finalized && i.ShopPO.Status != ShopPOStatus.Cancelled
+                && i.FinalizedAt >= start && i.FinalizedAt < end);
+        if (f.RegionId.HasValue) q = q.Where(i => i.ShopPO.Store.Route.FK_RegionId == f.RegionId.Value);
+        return await q.SumAsync(i => (decimal?)i.DiscountAmount) ?? 0m;
+    }
+
+    // Cash view, independent of Net Sales. Credit-method payments are store-credit usage, so they stay
+    // receivable (not collected). Outstanding/Overdue are balances as of the end of the range;
+    // overdue = unpaid balance on invoices finalized more than OverdueDays before that date.
+    private const int OverdueDays = 30;
+
+    public async Task<ReceivablesTotals> GetReceivablesAsync(DashboardFilter f)
+    {
+        var start = f.From.Date;
+        var end = f.To.Date.AddDays(1);
+
+        var pays = db.Payments.AsNoTracking().Where(p => p.IsActive && p.Method != PaymentMethod.Credit);
+        var invs = db.Invoices.AsNoTracking().Where(i => i.IsActive && i.Status == InvoiceStatus.Finalized
+            && i.ShopPO.Status != ShopPOStatus.Cancelled && i.FinalizedAt < end);
+        if (f.RegionId.HasValue)
+        {
+            pays = pays.Where(p => p.Invoice.ShopPO.Store.Route.FK_RegionId == f.RegionId.Value);
+            invs = invs.Where(i => i.ShopPO.Store.Route.FK_RegionId == f.RegionId.Value);
+        }
+
+        var collected = await pays.Where(p => p.CollectedAt >= start && p.CollectedAt < end)
+            .SumAsync(p => (decimal?)p.Amount) ?? 0m;
+
+        var rows = await invs.Select(i => new
+        {
+            i.FinalizedAt,
+            i.TotalAmount,
+            Paid = i.Payments.Where(p => p.IsActive && p.Method != PaymentMethod.Credit && p.CollectedAt < end)
+                .Sum(p => (decimal?)p.Amount) ?? 0m,
+        }).ToListAsync();
+
+        var balances = rows
+            .Select(r => (Due: r.FinalizedAt!.Value.AddDays(OverdueDays), Balance: Math.Max(0m, r.TotalAmount - r.Paid)))
+            .ToList();
+        return new ReceivablesTotals(collected,
+            balances.Sum(b => b.Balance),
+            balances.Where(b => b.Due < end).Sum(b => b.Balance));
     }
 
     public async Task<List<PeriodAmount>> GetDailySalesAsync(DashboardFilter f) =>

Distribution/Features/DashboardReport/DashboardReportService.cs

@@ -3,7 +3,7 @@ namespace Distribution.Features.DashboardReport;
 public class DashboardReportService(IDashboardReportRepository repo)
 {
     public const int MaxRangeDays = 366;
-    private const int DailyGranularityMaxDays = 62;
+    private const int DailyGranularityMaxDays = 92; // covers a "last 3 months" daily trend
 
     public static DashboardFilter BuildFilter(DateTime? from, DateTime? to, Guid? regionId, Guid? categoryId, Guid? warehouseId)
     {
@@ -25,14 +25,18 @@ public class DashboardReportService(IDashboardReportRepository repo)
 
     private static SalesKpis ToKpis(SalesTotals t)
     {
-        var net = t.GrossSales - t.ReturnValue;
+        var net = t.GrossSales - t.ReturnValue - t.Discounts;
         var gp = t.CostedSales - t.CostOfSales;
         return new SalesKpis(
-            t.GrossSales, t.ReturnValue, net, t.Orders,
+            t.GrossSales, t.ReturnValue, t.Discounts, net, t.Orders,
             t.Orders > 0 ? Math.Round(t.GrossSales / t.Orders, 2) : 0m,
             gp, t.CostedSales > 0 ? Math.Round(gp / t.CostedSales * 100, 2) : null);
     }
 
+    private static CashKpis ToCash(ReceivablesTotals r, decimal grossInvoiced) =>
+        new(r.Collected, r.Outstanding, r.Overdue,
+            grossInvoiced > 0 ? Math.Round(r.Collected / grossInvoiced * 100, 2) : null);
+
     public async Task<SalesSummaryResponse> GetSalesSummaryAsync(DashboardFilter f)
     {
         var days = (f.To - f.From).Days + 1;
@@ -41,6 +45,8 @@ public class DashboardReportService(IDashboardReportRepository repo)
 
         var current = await repo.GetSalesTotalsAsync(f);
         var previous = await repo.GetSalesTotalsAsync(prev);
+        var currentCash = await repo.GetReceivablesAsync(f);
+        var previousCash = await repo.GetReceivablesAsync(prev);
         var sales = await repo.GetDailySalesAsync(f);
         var returns = await repo.GetDailyReturnsAsync(f);
 
@@ -55,6 +61,9 @@ public class DashboardReportService(IDashboardReportRepository repo)
         return new SalesSummaryResponse(
             f.From, f.To, daily ? "day" : "month",
             new SalesKpiComparison(ToKpis(current), ToKpis(previous), prev.From, prev.To),
+            new CashKpiComparison(
+                ToCash(currentCash, current.GrossSales - current.Discounts),
+                ToCash(previousCash, previous.GrossSales - previous.Discounts)),
             trend,
             (await repo.GetSalesByCategoryAsync(f)).Select(Map).ToList(),
             (await repo.GetSalesByRegionAsync(f)).Select(Map).ToList(),

Distribution/Features/DashboardReport/IDashboardReportRepository.cs

@@ -5,6 +5,7 @@ public record GroupAggregate(Guid? Key, string Name, decimal Amount);
 public interface IDashboardReportRepository
 {
     Task<SalesTotals> GetSalesTotalsAsync(DashboardFilter f);
+    Task<ReceivablesTotals> GetReceivablesAsync(DashboardFilter f);
     Task<List<PeriodAmount>> GetDailySalesAsync(DashboardFilter f);
     Task<List<PeriodAmount>> GetDailyReturnsAsync(DashboardFilter f);
     Task<List<GroupAggregate>> GetSalesByCategoryAsync(DashboardFilter f);

Distribution/Features/DeliveryRide/DeliveryTaskService.cs

@@ -1,4 +1,5 @@
 using Distribution.Features.LoadingEvent;
+using Distribution.Features.Notifications;
 using Distribution.Features.Ride;
 using Distribution.Features.ShopPO;
 using Distribution.Features.Stock;
@@ -13,8 +14,18 @@ public class DeliveryTaskService(
     IShopPORepository shopPORepo,
     ILoadingSheetRepository loadingSheetRepo,
     StockMover mover,
+    INotificationService notifications,
     IUnitOfWork uow)
 {
+    private const string DeliveriesLink = "/operations/deliveries";
+
+    // Route owner + managers whose scope covers the store being delivered to.
+    private static List<RecipientRule> DeliveryRecipients(Guid storeId) =>
+    [
+        RecipientRule.RouteOwner(ScopeKind.Store, storeId),
+        RecipientRule.PermissionInScope("delivery-task.manage", ScopeKind.Store, storeId),
+    ];
+
     private static DeliveryTaskResponse ToResponse(DeliveryTask t) =>
         new(t.Id,
             t.FK_RideId,
@@ -181,6 +192,13 @@ public class DeliveryTaskService(
         }
         catch { await uow.RollbackAsync(ct); throw; }
 
+        if (!fullyDelivered && shopPO.Store is not null)
+            await notifications.NotifyAsync(
+                NotificationTypes.DeliveryTaskPartiallyDelivered,
+                DeliveryRecipients(shopPO.FK_StoreId),
+                new NotificationArgs(new { shopPO.Store.StoreName }, "DeliveryTask", task.Id, DeliveriesLink, userId),
+                ct);
+
         var saved = await repo.GetByIdAsync(taskId);
         return ToResponse(saved!);
     }
@@ -204,6 +222,13 @@ public class DeliveryTaskService(
         }
         catch { await uow.RollbackAsync(ct); throw; }
 
+        if (task.ShopPO?.Store is not null)
+            await notifications.NotifyAsync(
+                NotificationTypes.DeliveryTaskFailed,
+                DeliveryRecipients(task.ShopPO.FK_StoreId),
+                new NotificationArgs(new { task.ShopPO.Store.StoreName, Note = note }, "DeliveryTask", task.Id, DeliveriesLink),
+                ct);
+
         return ToResponse(task);
     }
 }

Distribution/Features/Invoice/IInvoiceRepository.cs

@@ -9,6 +9,12 @@ public interface IInvoiceRepository
     Task<List<Models.Invoice>> GetAllAsync(Guid? agentId, Guid? routeId, Guid? shopId, InvoiceStatus? status, PaymentStatus? paymentStatus, int page, int pageSize);
     Task<int> GetCountAsync(Guid? agentId, Guid? routeId, Guid? shopId, InvoiceStatus? status, PaymentStatus? paymentStatus);
     Task<List<Models.Invoice>> GetOutstandingAsync();
+    Task<decimal> GetSchemeDiscountAsync(Guid shopPOId);
     Task AddAsync(Models.Invoice invoice);
+    Task<Models.Item?> GetItemAsync(Guid itemId);
+    Task AddItemsAsync(IEnumerable<InvoiceItem> items);
+    Task AddVersionAsync(InvoiceVersion version);
+    Task<int> GetLatestVersionNumberAsync(Guid invoiceId);
+    Task<List<InvoiceVersion>> GetVersionsAsync(Guid invoiceId);
     void Update(Models.Invoice invoice);
 }

Distribution/Features/Invoice/InvoiceController.cs

@@ -36,6 +36,52 @@ public class InvoiceController(InvoiceService service, ICurrentUserService curre
         return result is null ? NotFound() : Ok(result);
     }
 
+    [HttpPost]
+    public async Task<IActionResult> Create([FromBody] CreateInvoiceRequest request, CancellationToken ct)
+    {
+        // TEMPORARY: currentUser.UserId is always unset due to the broken auth middleware
+        // (testbug.md #28) — fall back to the explicitly supplied user until that's fixed.
+        var userId = currentUser.UserId ?? request.CreatedByUserId;
+        if (userId is null) return BadRequest(new { error = "CreatedByUserId is required while auth is unavailable" });
+        try
+        {
+            var result = await service.CreateAsync(request, userId.Value, ct);
+            return CreatedAtAction(nameof(GetById), new { id = result.Id }, result);
+        }
+        catch (KeyNotFoundException) { return NotFound(); }
+        catch (InvalidOperationException ex) { return BadRequest(new { error = ex.Message }); }
+    }
+
+    [HttpPost("{id:guid}/preview-totals")]
+    public async Task<IActionResult> PreviewTotals(Guid id, [FromBody] PreviewInvoiceTotalsRequest request)
+    {
+        var result = await service.PreviewTotalsAsync(id, request);
+        return result is null ? NotFound() : Ok(result);
+    }
+
+    [HttpGet("{id:guid}/versions")]
+    public async Task<IActionResult> GetVersions(Guid id)
+    {
+        var result = await service.GetVersionsAsync(id);
+        return result is null ? NotFound() : Ok(result);
+    }
+
+    [HttpPut("{id:guid}/items")]
+    public async Task<IActionResult> UpdateItems(Guid id, [FromBody] UpdateInvoiceItemsRequest request, CancellationToken ct)
+    {
+        // TEMPORARY: currentUser.UserId is always unset due to the broken auth middleware
+        // (testbug.md #28) — fall back to the explicitly supplied user until that's fixed.
+        var userId = currentUser.UserId ?? request.EditedByUserId;
+        if (userId is null) return BadRequest(new { error = "EditedByUserId is required while auth is unavailable" });
+        try
+        {
+            var result = await service.UpdateItemsAsync(id, request, userId.Value, ct);
+            return Ok(result);
+        }
+        catch (KeyNotFoundException) { return NotFound(); }
+        catch (InvalidOperationException ex) { return BadRequest(new { error = ex.Message }); }
+    }
+
     [HttpPost("{id:guid}/print")]
     public async Task<IActionResult> Print(Guid id, [FromBody] PrintInvoiceRequest? request, CancellationToken ct)
     {

Distribution/Features/Invoice/InvoiceDTOs.cs

@@ -1,12 +1,48 @@
-using Distribution.Models;
+using Distribution.Features.ShopPO;
+using Distribution.Models;
 
 namespace Distribution.Features.Invoice;
 
-public record CreateInvoiceRequest(Guid ShopPOId);
-public record InvoiceItemAdjustment(Guid ShopPOItemId, int AdjustedQuantity, string? Note = null);
+public record CreateInvoiceRequest(Guid ShopPOId, Guid? CreatedByUserId = null);
+public record InvoiceItemAdjustment(Guid InvoiceItemId, int AdjustedQuantity, bool IsRemoved = false, string? Note = null);
 public record FinalizeInvoiceRequest(List<InvoiceItemAdjustment>? Adjustments = null, Guid? FinalizedByUserId = null);
 public record PrintInvoiceRequest(Guid? PrintedByUserId = null);
 
+// InvoiceItemId set = edit/remove/restore an existing line; ItemId set (InvoiceItemId null) = add a new line.
+public record InvoiceItemEdit(Guid? InvoiceItemId, Guid? ItemId, int Quantity, decimal? UnitPrice = null, bool IsRemoved = false);
+// DiscountSchemeIds: the percentage-discount scheme chosen in the editor (at most one); null = leave as is.
+public record UpdateInvoiceItemsRequest(List<InvoiceItemEdit> Items, Guid? EditedByUserId = null, List<Guid>? DiscountSchemeIds = null);
+
+public record PreviewLine(Guid ItemId, int Quantity, decimal UnitPrice, bool IsFree = false, bool IsRemoved = false, Guid? SchemeId = null);
+public record PreviewInvoiceTotalsRequest(List<PreviewLine> Items, List<Guid>? DiscountSchemeIds = null);
+// Quantity = how many free units the scheme still entitles for the lines as typed.
+public record FreeEntitlement(Guid SchemeId, int Quantity);
+public record InvoiceTotalsPreview(decimal DiscountAmount, decimal TotalAmount, List<FreeEntitlement> FreeEntitlements);
+
+public record InvoiceVersionItemResponse(Guid? ShopPOItemId, Guid ItemId, string ItemName, int Quantity, decimal UnitPrice, bool IsRemoved);
+
+public record InvoiceVersionResponse(
+    Guid Id,
+    int VersionNumber,
+    InvoiceVersionStage Stage,
+    decimal TotalAmount,
+    Guid CreatedBy,
+    DateTime CreatedAt,
+    List<InvoiceVersionItemResponse> Items);
+
+public record InvoiceItemResponse(
+    Guid Id,
+    Guid? ShopPOItemId,
+    Guid ItemId,
+    string ItemName,
+    int? OrderedQuantity,
+    int Quantity,
+    decimal UnitPrice,
+    bool IsRemoved,
+    bool IsFree = false,
+    Guid? SchemeId = null,
+    string? SchemeName = null);
+
 public record InvoiceResponse(
     Guid Id,
     Guid ShopPOId,
@@ -20,8 +56,11 @@ public record InvoiceResponse(
     DateTime? FinalizedAt,
     Guid? FinalizedBy,
     decimal TotalAmount,
+    decimal DiscountAmount,
     decimal PaidAmount,
     bool IsActive,
-    DateTime CreatedAt);
+    DateTime CreatedAt,
+    List<InvoiceItemResponse> Items,
+    List<ShopPODiscountResponse>? Discounts = null);
 
 public record OutstandingPaymentsResponse(int InvoiceCount, decimal OutstandingAmount);

Distribution/Features/Invoice/InvoiceRepository.cs

@@ -10,6 +10,8 @@ public class InvoiceRepository(AppDBContext context) : IInvoiceRepository
         await context.Invoices
             .Include(i => i.ShopPO).ThenInclude(p => p.Store)
             .Include(i => i.ShopPO).ThenInclude(p => p.Items.Where(x => x.IsActive))
+            .Include(i => i.Items.Where(x => x.IsActive)).ThenInclude(x => x.Item)
+            .Include(i => i.Items.Where(x => x.IsActive)).ThenInclude(x => x.ShopPOItem)
             .Include(i => i.Payments.Where(p => p.IsActive))
             .FirstOrDefaultAsync(i => i.Id == id && i.IsActive);
 
@@ -49,9 +51,35 @@ public class InvoiceRepository(AppDBContext context) : IInvoiceRepository
             .Where(i => i.IsActive && i.PaymentStatus != PaymentStatus.Paid)
             .ToListAsync();
 
+    public async Task<decimal> GetSchemeDiscountAsync(Guid shopPOId) =>
+        await context.SchemeRedemptions
+            .Where(r => r.FK_ShopPOId == shopPOId)
+            .SumAsync(r => r.DiscountAmount) ?? 0m;
+
     public async Task AddAsync(Models.Invoice invoice) =>
         await context.Invoices.AddAsync(invoice);
 
+    public async Task<Models.Item?> GetItemAsync(Guid itemId) =>
+        await context.Items.FirstOrDefaultAsync(i => i.Id == itemId && i.IsActive);
+
+    public async Task AddItemsAsync(IEnumerable<InvoiceItem> items) =>
+        await context.InvoiceItems.AddRangeAsync(items);
+
+    public async Task AddVersionAsync(InvoiceVersion version) =>
+        await context.InvoiceVersions.AddAsync(version);
+
+    public async Task<int> GetLatestVersionNumberAsync(Guid invoiceId) =>
+        await context.InvoiceVersions
+            .Where(v => v.FK_InvoiceId == invoiceId)
+            .MaxAsync(v => (int?)v.VersionNumber) ?? 0;
+
+    public async Task<List<InvoiceVersion>> GetVersionsAsync(Guid invoiceId) =>
+        await context.InvoiceVersions
+            .Include(v => v.Items).ThenInclude(i => i.Item)
+            .Where(v => v.FK_InvoiceId == invoiceId && v.IsActive)
+            .OrderBy(v => v.VersionNumber)
+            .ToListAsync();
+
     public void Update(Models.Invoice invoice) =>
         context.Invoices.Update(invoice);
 }

Distribution/Features/Invoice/InvoiceService.cs

@@ -1,4 +1,6 @@
-using Distribution.Features.Stock;
+using Distribution.Features.Scheme;
+using Distribution.Features.ShopPO;
+using Distribution.Features.Stock;
 using Distribution.Infra.Authorization;
 using Distribution.Infra.UoW;
 using Distribution.Models;
@@ -7,6 +9,8 @@ namespace Distribution.Features.Invoice;
 
 public class InvoiceService(
     IInvoiceRepository repo,
+    IShopPORepository shopPoRepo,
+    SchemeService schemeService,
     IUnitOfWork uow,
     ICurrentUserService currentUser)
 {
@@ -17,14 +21,114 @@ public class InvoiceService(
             i.Status, i.PaymentStatus, i.CreatedBy,
             i.PrintedAt, i.PrintedBy,
             i.FinalizedAt, i.FinalizedBy,
-            i.TotalAmount,
+            i.TotalAmount, i.DiscountAmount,
             i.Payments?.Where(p => p.IsActive).Sum(p => p.Amount) ?? 0m,
-            i.IsActive, i.CreatedAt);
+            i.IsActive, i.CreatedAt,
+            i.Items.Where(x => x.IsActive).Select(x =>
+                new InvoiceItemResponse(x.Id, x.FK_ShopPOItemId, x.FK_ItemId,
+                    x.Item?.Name ?? string.Empty, x.ShopPOItem?.Quantity,
+                    x.Quantity, x.UnitPrice, x.IsRemoved, x.IsFree, x.FK_SchemeId, x.SchemeName)).ToList());
+
+    private static decimal BillableTotal(IEnumerable<InvoiceItem> items) =>
+        items.Where(i => i.IsActive && !i.IsRemoved).Sum(i => i.Quantity * i.UnitPrice);
+
+    // The lines that count toward a percentage discount: active, not struck out. Free issues carry the flag so the
+    // scheme rules ignore them.
+    private static List<ShopPOItem> DiscountableLines(IEnumerable<InvoiceItem> items) =>
+        items.Where(i => i.IsActive && !i.IsRemoved)
+            .Select(i => new ShopPOItem { FK_ItemId = i.FK_ItemId, Quantity = i.Quantity, UnitPrice = i.UnitPrice, IsFree = i.IsFree })
+            .ToList();
+
+    // TotalAmount = billable lines - scheme discount. The discount is re-evaluated against the current lines
+    // (so adding/removing/re-pricing items moves it, and a slab level can be gained or lost) whenever lines change
+    // and at print/finalize. The redemption amount is updated with it.
+    private async Task ApplyTotalsAsync(Models.Invoice invoice, IEnumerable<InvoiceItem> items)
+    {
+        var lines = items.ToList();
+        // Lowering/removing the paid item that earned a free issue lowers the free quantity with it.
+        await schemeService.ReconcileInvoiceFreeLinesAsync(invoice.FK_ShopPOId, lines);
+        var billable = BillableTotal(lines);
+        var discount = await schemeService.CalculateDiscountAsync(invoice.FK_ShopPOId, DiscountableLines(lines), persist: true);
+        invoice.DiscountAmount = Math.Min(discount, billable);
+        invoice.TotalAmount = billable - invoice.DiscountAmount;
+    }
+
+    // Live preview for the draft editor: what the discount and total would be for these unsaved lines. Changes nothing.
+    public async Task<InvoiceTotalsPreview?> PreviewTotalsAsync(Guid id, PreviewInvoiceTotalsRequest request)
+    {
+        var invoice = await repo.GetByIdAsync(id);
+        if (invoice is null) return null;
+
+        var lines = request.Items.Where(l => !l.IsRemoved)
+            .Select(l => new ShopPOItem { FK_ItemId = l.ItemId, Quantity = l.Quantity, UnitPrice = l.UnitPrice, IsFree = l.IsFree, FK_SchemeId = l.SchemeId })
+            .ToList();
+        var billable = lines.Sum(l => l.Quantity * l.UnitPrice);
+        var chosen = request.DiscountSchemeIds is null
+            ? await schemeService.CalculateDiscountAsync(invoice.FK_ShopPOId, lines, persist: false)
+            : await schemeService.CalculateDiscountForSchemesAsync(request.DiscountSchemeIds, lines);
+        var discount = Math.Min(chosen, billable);
+
+        var schemeIds = lines.Where(l => l.IsFree && l.FK_SchemeId.HasValue).Select(l => l.FK_SchemeId!.Value).ToList();
+        var entitlements = (await schemeService.GetFreeEntitlementsAsync(schemeIds, lines))
+            .Select(e => new FreeEntitlement(e.Key, e.Value)).ToList();
+        return new InvoiceTotalsPreview(discount, billable - discount, entitlements);
+    }
+
+    // Immutable copy of the invoice lines as they stand right now.
+    public static InvoiceVersion BuildVersion(Models.Invoice invoice, IEnumerable<InvoiceItem> items, int versionNumber, InvoiceVersionStage stage, Guid userId) =>
+        new()
+        {
+            FK_InvoiceId = invoice.Id,
+            VersionNumber = versionNumber,
+            Stage = stage,
+            TotalAmount = invoice.TotalAmount,
+            CreatedBy = userId,
+            Items = items.Select(i => new InvoiceVersionItem
+            {
+                FK_ShopPOItemId = i.FK_ShopPOItemId,
+                FK_ItemId = i.FK_ItemId,
+                Quantity = i.Quantity,
+                UnitPrice = i.UnitPrice,
+                IsRemoved = i.IsRemoved
+            }).ToList()
+        };
+
+    public async Task<List<InvoiceVersionResponse>?> GetVersionsAsync(Guid id)
+    {
+        if (await repo.GetByIdAsync(id) is null) return null;
+        var versions = await repo.GetVersionsAsync(id);
+        return versions.Select(v => new InvoiceVersionResponse(
+            v.Id, v.VersionNumber, v.Stage, v.TotalAmount, v.CreatedBy, v.CreatedAt,
+            v.Items.Select(i => new InvoiceVersionItemResponse(
+                i.FK_ShopPOItemId, i.FK_ItemId, i.Item?.Name ?? string.Empty, i.Quantity, i.UnitPrice, i.IsRemoved)).ToList())).ToList();
+    }
+
+    private async Task AddVersionAsync(Models.Invoice invoice, InvoiceVersionStage stage, Guid userId, IEnumerable<InvoiceItem>? addedLines = null)
+    {
+        var next = await repo.GetLatestVersionNumberAsync(invoice.Id) + 1;
+        // Added lines may or may not be in invoice.Items yet, so merge by reference.
+        var lines = invoice.Items.Concat(addedLines ?? []).Where(i => i.IsActive).Distinct();
+        await repo.AddVersionAsync(BuildVersion(invoice, lines, next, stage, userId));
+    }
+
+    public static List<InvoiceItem> BuildItemsFromShopPO(Models.ShopPO po, Guid invoiceId) =>
+        po.Items.Where(i => i.IsActive).Select(i => new InvoiceItem
+        {
+            FK_InvoiceId = invoiceId,
+            FK_ShopPOItemId = i.Id,
+            FK_ItemId = i.FK_ItemId,
+            Quantity = i.Quantity,
+            UnitPrice = i.UnitPrice,
+            IsFree = i.IsFree,
+            FK_SchemeId = i.FK_SchemeId,
+            SchemeName = i.SchemeName
+        }).ToList();
 
     public async Task<InvoiceResponse?> GetByIdAsync(Guid id)
     {
         var invoice = await repo.GetByIdAsync(id);
-        return invoice is null ? null : ToResponse(invoice);
+        if (invoice is null) return null;
+        return ToResponse(invoice) with { Discounts = await schemeService.GetDiscountsForShopPOAsync(invoice.FK_ShopPOId) };
     }
 
     public async Task<PagedResponse<InvoiceResponse>> GetAllAsync(Guid? agentId, Guid? routeId, Guid? shopId, InvoiceStatus? status, PaymentStatus? paymentStatus, int page, int pageSize)
@@ -42,6 +146,131 @@ public class InvoiceService(
         return new OutstandingPaymentsResponse(count, outstanding);
     }
 
+    public async Task<InvoiceResponse> CreateAsync(CreateInvoiceRequest request, Guid createdBy, CancellationToken ct = default)
+    {
+        var po = await shopPoRepo.GetByIdAsync(request.ShopPOId)
+            ?? throw new KeyNotFoundException("Shop PO not found");
+
+        if (po.ConfirmedAt is null)
+            throw new InvalidOperationException("Shop PO must be confirmed before an invoice can be created");
+        if (po.Status == ShopPOStatus.Cancelled)
+            throw new InvalidOperationException("Cannot create an invoice for a cancelled Shop PO");
+        if (po.InvoiceId is not null)
+            throw new InvalidOperationException("An invoice already exists for this Shop PO");
+
+        var invoice = new Models.Invoice
+        {
+            FK_ShopPOId = po.Id,
+            Status = InvoiceStatus.Draft,
+            PaymentStatus = PaymentStatus.Pending,
+            CreatedBy = createdBy
+        };
+        var lines = BuildItemsFromShopPO(po, invoice.Id);
+        await ApplyTotalsAsync(invoice, lines);
+
+        await uow.BeginAsync(ct);
+        try
+        {
+            await repo.AddAsync(invoice);
+            await repo.AddItemsAsync(lines);
+            await repo.AddVersionAsync(BuildVersion(invoice, lines, 1, InvoiceVersionStage.Created, createdBy));
+            po.InvoiceId = invoice.Id;
+            shopPoRepo.Update(po);
+            await uow.CommitAsync(ct);
+        }
+        catch { await uow.RollbackAsync(ct); throw; }
+
+        var saved = await repo.GetByIdAsync(invoice.Id);
+        return ToResponse(saved!);
+    }
+
+    public async Task<InvoiceResponse> UpdateItemsAsync(Guid id, UpdateInvoiceItemsRequest request, Guid editedBy, CancellationToken ct = default)
+    {
+        var invoice = await repo.GetByIdAsync(id)
+            ?? throw new KeyNotFoundException("Invoice not found");
+
+        if (invoice.Status != InvoiceStatus.Draft)
+            throw new InvalidOperationException($"Items can only be edited while the invoice is Draft (current: {invoice.Status})");
+
+        var newLines = new List<InvoiceItem>();
+
+        foreach (var edit in request.Items)
+        {
+            if (edit.UnitPrice is < 0)
+                throw new InvalidOperationException("Unit price cannot be negative");
+
+            if (edit.InvoiceItemId is Guid lineId)
+            {
+                // Existing line: edit quantity/price, or strike it (IsRemoved) / restore it.
+                var item = invoice.Items.FirstOrDefault(i => i.Id == lineId && i.IsActive)
+                    ?? throw new InvalidOperationException($"Invoice item {lineId} not found on this invoice");
+
+                item.IsRemoved = edit.IsRemoved;
+                if (!edit.IsRemoved)
+                {
+                    ValidateQuantity(item, edit.Quantity);
+                    item.Quantity = edit.Quantity;
+                }
+                if (edit.UnitPrice is decimal price)
+                {
+                    if (item.IsFree && price != 0m)
+                        throw new InvalidOperationException("A free-issue line must stay at zero price");
+                    item.UnitPrice = price;
+                }
+            }
+            else if (edit.ItemId is Guid itemId)
+            {
+                // New line for an item that was not on the PO.
+                if (edit.IsRemoved) continue;
+                if (edit.Quantity <= 0)
+                    throw new InvalidOperationException("Quantity for an added item must be greater than zero");
+                if (edit.UnitPrice is null)
+                    throw new InvalidOperationException("Unit price is required for an added item");
+                if (invoice.Items.Concat(newLines).Any(i => i.IsActive && !i.IsRemoved && i.FK_ItemId == itemId))
+                    throw new InvalidOperationException("This item is already on the invoice — edit its existing line instead");
+
+                var catalogItem = await repo.GetItemAsync(itemId)
+                    ?? throw new InvalidOperationException($"Item {itemId} not found");
+
+                newLines.Add(new InvoiceItem
+                {
+                    FK_InvoiceId = invoice.Id,
+                    FK_ItemId = catalogItem.Id,
+                    Item = catalogItem,
+                    Quantity = edit.Quantity,
+                    UnitPrice = edit.UnitPrice.Value
+                });
+            }
+            else
+                throw new InvalidOperationException("Each edit needs an invoiceItemId (existing line) or an itemId (new line)");
+        }
+
+        var allLines = invoice.Items.Concat(newLines).ToList();
+        await schemeService.ApplyInvoiceDiscountSelectionAsync(
+            invoice.FK_ShopPOId, invoice.ShopPO?.FK_StoreId ?? Guid.Empty, allLines, request.DiscountSchemeIds);
+        await ApplyTotalsAsync(invoice, allLines);
+
+        await uow.BeginAsync(ct);
+        try
+        {
+            repo.Update(invoice);
+            if (newLines.Count > 0) await repo.AddItemsAsync(newLines);
+            await AddVersionAsync(invoice, InvoiceVersionStage.DraftEdited, editedBy, newLines);
+            await uow.CommitAsync(ct);
+        }
+        catch { await uow.RollbackAsync(ct); throw; }
+
+        return (await GetByIdAsync(id))!;
+    }
+
+    private static void ValidateQuantity(InvoiceItem item, int quantity)
+    {
+        var ordered = item.ShopPOItem?.Quantity ?? int.MaxValue;
+        if (quantity < 0 || quantity > ordered)
+            throw new InvalidOperationException(
+                $"Quantity for item {item.Id} must be between 0 and {ordered}");
+    }
+
     public async Task<InvoiceResponse> PrintAsync(Guid id, Guid printedBy, CancellationToken ct = default)
     {
         var invoice = await repo.GetByIdAsync(id)
@@ -50,12 +279,21 @@ public class InvoiceService(
         if (invoice.Status != InvoiceStatus.Draft)
             throw new InvalidOperationException($"Cannot print an invoice in {invoice.Status} status");
 
+        // Printing fixes the amount the customer sees, so pick up any scheme discount applied since the last edit.
+        var lines = invoice.Items.Where(i => i.IsActive).ToList();
+        if (lines.Count > 0) await ApplyTotalsAsync(invoice, lines);
+
         invoice.Status = InvoiceStatus.Printed;
         invoice.PrintedAt = DateTime.Now;
         invoice.PrintedBy = printedBy;
 
         await uow.BeginAsync(ct);
-        try { repo.Update(invoice); await uow.CommitAsync(ct); }
+        try
+        {
+            repo.Update(invoice);
+            await AddVersionAsync(invoice, InvoiceVersionStage.Printed, printedBy);
+            await uow.CommitAsync(ct);
+        }
         catch { await uow.RollbackAsync(ct); throw; }
 
         return ToResponse(invoice);
@@ -69,31 +307,37 @@ public class InvoiceService(
         if (invoice.Status != InvoiceStatus.Printed)
             throw new InvalidOperationException($"Cannot finalize an invoice in {invoice.Status} status");
 
+        var items = invoice.Items.Where(i => i.IsActive).ToList();
         var adjustments = request.Adjustments ?? [];
-        if (adjustments.Count > 0)
+
+        // Agent's handwritten edits from the printed copy are written onto the invoice lines.
+        foreach (var adjustment in adjustments)
         {
-            var poItems = invoice.ShopPO.Items.Where(i => i.IsActive).ToList();
-            decimal total = 0;
-            foreach (var item in poItems)
+            var item = items.FirstOrDefault(i => i.Id == adjustment.InvoiceItemId)
+                ?? throw new InvalidOperationException($"Invoice item {adjustment.InvoiceItemId} is not on this invoice");
+
+            item.IsRemoved = adjustment.IsRemoved;
+            if (!adjustment.IsRemoved)
             {
-                var adjustment = adjustments.FirstOrDefault(a => a.ShopPOItemId == item.Id);
-                var billedQuantity = adjustment is not null ? adjustment.AdjustedQuantity : item.Quantity;
-
-                if (billedQuantity < 0 || billedQuantity > item.Quantity)
-                    throw new InvalidOperationException(
-                        $"Adjusted quantity for item {item.Id} must be between 0 and {item.Quantity}");
-
-                total += billedQuantity * item.UnitPrice;
+                ValidateQuantity(item, adjustment.AdjustedQuantity);
+                item.Quantity = adjustment.AdjustedQuantity;
             }
-            invoice.TotalAmount = total;
         }
 
+        if (items.Count > 0)
+            await ApplyTotalsAsync(invoice, items);
+
         invoice.Status = InvoiceStatus.Finalized;
         invoice.FinalizedAt = DateTime.Now;
         invoice.FinalizedBy = finalizedBy;
 
         await uow.BeginAsync(ct);
-        try { repo.Update(invoice); await uow.CommitAsync(ct); }
+        try
+        {
+            repo.Update(invoice);
+            await AddVersionAsync(invoice, InvoiceVersionStage.Finalized, finalizedBy);
+            await uow.CommitAsync(ct);
+        }
         catch { await uow.RollbackAsync(ct); throw; }
 
         return ToResponse(invoice);

Distribution/Features/Notifications/INotificationRepository.cs

@@ -0,0 +1,29 @@
+namespace Distribution.Features.Notifications;
+
+public interface INotificationRepository
+{
+    // ── Inbox ────────────────────────────────────────────────────────────
+    Task AddAsync(Models.Notification notification);
+    /// <summary>Stops tracking a notification (and its recipients) whose save failed.</summary>
+    void Discard(Models.Notification notification);
+
+    Task<int> GetInboxCountAsync(Guid userId, bool unreadOnly);
+    Task<List<Models.NotificationRecipient>> GetInboxAsync(Guid userId, bool unreadOnly, int page, int pageSize);
+    Task<int> GetUnreadCountAsync(Guid userId);
+    Task<Models.NotificationRecipient?> GetRecipientAsync(Guid userId, Guid recipientId);
+    Task<List<Models.NotificationRecipient>> GetUnreadRecipientsAsync(Guid userId);
+    void RemoveRecipient(Models.NotificationRecipient recipient);
+
+    // ── Recipient resolution ─────────────────────────────────────────────
+    Task<List<Guid>> FilterActiveUserIdsAsync(IEnumerable<Guid> userIds);
+    Task<List<Guid>> GetUserIdsByPermissionAsync(string permissionCode);
+    Task<List<Guid>> GetUserIdsByScopeAsync(ScopeKind kind, Guid id);
+    Task<Guid?> GetReportsToUserIdAsync(Guid userId);
+    Task<Guid?> GetRouteOwnerUserIdAsync(ScopeKind kind, Guid id);
+
+    // ── Retention ────────────────────────────────────────────────────────
+    Task<List<Models.NotificationRecipient>> GetExpiredReadRecipientsAsync(DateTime cutoff, int take);
+    Task<List<Models.Notification>> GetOrphanNotificationsAsync(int take);
+    void RemoveRecipients(IEnumerable<Models.NotificationRecipient> recipients);
+    void RemoveNotifications(IEnumerable<Models.Notification> notifications);
+}

Distribution/Features/Notifications/NotificationCleanupJob.cs

@@ -0,0 +1,63 @@
+using Distribution.Infra.UoW;
+
+namespace Distribution.Features.Notifications;
+
+/// <summary>
+/// Daily retention purge: deletes read inbox rows older than <c>Notifications:RetentionDays</c>
+/// (default 90), then any notification left with no recipients.
+/// </summary>
+public class NotificationCleanupJob(
+    IServiceScopeFactory scopes,
+    IConfiguration config,
+    ILogger<NotificationCleanupJob> logger) : BackgroundService
+{
+    private const int BatchSize = 500;
+
+    protected override async Task ExecuteAsync(CancellationToken stoppingToken)
+    {
+        // Let the app finish starting before the first run.
+        await Task.Delay(TimeSpan.FromMinutes(1), stoppingToken);
+
+        while (!stoppingToken.IsCancellationRequested)
+        {
+            try { await RunOnceAsync(stoppingToken); }
+            catch (OperationCanceledException) { break; }
+            catch (Exception ex) { logger.LogError(ex, "Notification cleanup failed."); }
+
+            await Task.Delay(TimeSpan.FromHours(24), stoppingToken);
+        }
+    }
+
+    private async Task RunOnceAsync(CancellationToken ct)
+    {
+        var retentionDays = config.GetValue("Notifications:RetentionDays", 90);
+        var cutoff = DateTime.Now.AddDays(-retentionDays);
+
+        using var scope = scopes.CreateScope();
+        var repo = scope.ServiceProvider.GetRequiredService<INotificationRepository>();
+        var uow = scope.ServiceProvider.GetRequiredService<IUnitOfWork>();
+
+        var removed = 0;
+        while (true)
+        {
+            var expired = await repo.GetExpiredReadRecipientsAsync(cutoff, BatchSize);
+            if (expired.Count == 0) break;
+
+            repo.RemoveRecipients(expired);
+            await uow.CommitAsync(ct);
+            removed += expired.Count;
+        }
+
+        while (true)
+        {
+            var orphans = await repo.GetOrphanNotificationsAsync(BatchSize);
+            if (orphans.Count == 0) break;
+
+            repo.RemoveNotifications(orphans);
+            await uow.CommitAsync(ct);
+        }
+
+        if (removed > 0)
+            logger.LogInformation("Notification cleanup removed {Count} read inbox rows older than {Days} days.", removed, retentionDays);
+    }
+}

Distribution/Features/Notifications/NotificationController.cs

@@ -0,0 +1,57 @@
+using Distribution.Infra.Authorization;
+using Microsoft.AspNetCore.Mvc;
+
+namespace Distribution.Features.Notifications;
+
+/// <summary>Every endpoint acts on the signed-in user's own notifications only.</summary>
+[ApiController]
+[Route("api/notifications")]
+public class NotificationController(NotificationService service, ICurrentUserService currentUser) : ControllerBase
+{
+    [HttpGet]
+    public async Task<IActionResult> GetInbox(
+        [FromQuery] bool unreadOnly = false, [FromQuery] int page = 1, [FromQuery] int pageSize = 20)
+    {
+        if (currentUser.UserId is not { } userId) return Unauthorized();
+        return Ok(await service.GetInboxAsync(userId, unreadOnly, page, pageSize));
+    }
+
+    [HttpGet("unread-count")]
+    public async Task<IActionResult> GetUnreadCount()
+    {
+        if (currentUser.UserId is not { } userId) return Unauthorized();
+        return Ok(await service.GetUnreadCountAsync(userId));
+    }
+
+    [HttpPatch("{id:guid}/read")]
+    public async Task<IActionResult> MarkRead(Guid id, CancellationToken ct)
+    {
+        if (currentUser.UserId is not { } userId) return Unauthorized();
+        try
+        {
+            await service.MarkReadAsync(userId, id, ct);
+            return NoContent();
+        }
+        catch (KeyNotFoundException ex) { return NotFound(new { error = ex.Message }); }
+    }
+
+    [HttpPatch("read-all")]
+    public async Task<IActionResult> MarkAllRead(CancellationToken ct)
+    {
+        if (currentUser.UserId is not { } userId) return Unauthorized();
+        await service.MarkAllReadAsync(userId, ct);
+        return NoContent();
+    }
+
+    [HttpDelete("{id:guid}")]
+    public async Task<IActionResult> Delete(Guid id, CancellationToken ct)
+    {
+        if (currentUser.UserId is not { } userId) return Unauthorized();
+        try
+        {
+            await service.DeleteAsync(userId, id, ct);
+            return NoContent();
+        }
+        catch (KeyNotFoundException ex) { return NotFound(new { error = ex.Message }); }
+    }
+}

Distribution/Features/Notifications/NotificationDTOs.cs

@@ -0,0 +1,28 @@
+using Distribution.Models;
+
+namespace Distribution.Features.Notifications;
+
+/// <param name="Values">Object whose public properties fill the {Token} placeholders in the type's templates.</param>
+/// <param name="CreatedByUserId">The acting user; excluded from the recipients.</param>
+public record NotificationArgs(
+    object? Values,
+    string EntityType,
+    Guid EntityId,
+    string Link,
+    Guid? CreatedByUserId = null);
+
+/// <param name="Id">The caller's own recipient row id — use it for read / delete.</param>
+public record NotificationResponse(
+    Guid Id,
+    string Type,
+    NotificationSeverity Severity,
+    string Title,
+    string Message,
+    string EntityType,
+    Guid EntityId,
+    string Link,
+    DateTime CreatedAt,
+    bool IsRead,
+    DateTime? ReadAt);
+
+public record UnreadCountResponse(int Count);

Distribution/Features/Notifications/NotificationHub.cs

@@ -0,0 +1,22 @@
+using Microsoft.AspNetCore.Authorization;
+using Microsoft.AspNetCore.SignalR;
+
+namespace Distribution.Features.Notifications;
+
+/// <summary>
+/// Server → client only. The server pushes a "notification" event to each recipient; clients never
+/// invoke hub methods. Users are addressed by their id (see <see cref="NotificationUserIdProvider"/>).
+/// </summary>
+[Authorize]
+public class NotificationHub : Hub
+{
+    public const string Path = "/hubs/notifications";
+    public const string ClientEvent = "notification";
+}
+
+/// <summary>Maps a SignalR connection to the "UserId" claim that <c>AuthMiddleware</c> puts on the principal.</summary>
+public class NotificationUserIdProvider : IUserIdProvider
+{
+    public string? GetUserId(HubConnectionContext connection) =>
+        connection.User?.FindFirst("UserId")?.Value;
+}

Distribution/Features/Notifications/NotificationRecipientResolver.cs

@@ -0,0 +1,53 @@
+namespace Distribution.Features.Notifications;
+
+public class NotificationRecipientResolver(INotificationRepository repo)
+{
+    /// <summary>
+    /// Expands the rules into a de-duplicated list of active user ids, never including
+    /// <paramref name="actingUserId"/>.
+    /// </summary>
+    public async Task<List<Guid>> ResolveAsync(IEnumerable<RecipientRule> rules, Guid? actingUserId)
+    {
+        var ids = new HashSet<Guid>();
+
+        foreach (var rule in rules)
+            ids.UnionWith(await ResolveRuleAsync(rule));
+
+        if (actingUserId is { } actor)
+            ids.Remove(actor);
+
+        if (ids.Count == 0) return [];
+        return await repo.FilterActiveUserIdsAsync(ids);
+    }
+
+    private async Task<IEnumerable<Guid>> ResolveRuleAsync(RecipientRule rule)
+    {
+        switch (rule)
+        {
+            case UsersRule r:
+                return r.Ids;
+
+            case PermissionRule r:
+                return await repo.GetUserIdsByPermissionAsync(r.Code);
+
+            case ScopeRule r:
+                return await repo.GetUserIdsByScopeAsync(r.Kind, r.Id);
+
+            case PermissionInScopeRule r:
+                var withPermission = await repo.GetUserIdsByPermissionAsync(r.Code);
+                var inScope = await repo.GetUserIdsByScopeAsync(r.Kind, r.Id);
+                return withPermission.Intersect(inScope);
+
+            case ReportsToRule r:
+                var supervisor = await repo.GetReportsToUserIdAsync(r.UserId);
+                return supervisor is { } s ? [s] : [];
+
+            case RouteOwnerRule r:
+                var owner = await repo.GetRouteOwnerUserIdAsync(r.Kind, r.Id);
+                return owner is { } o ? [o] : [];
+
+            default:
+                throw new NotSupportedException($"Unknown recipient rule {rule.GetType().Name}.");
+        }
+    }
+}

Distribution/Features/Notifications/NotificationRepository.cs

@@ -0,0 +1,156 @@
+using Distribution.Data;
+using Microsoft.EntityFrameworkCore;
+
+namespace Distribution.Features.Notifications;
+
+public class NotificationRepository(AppDBContext context) : INotificationRepository
+{
+    // ── Inbox ────────────────────────────────────────────────────────────
+
+    public async Task AddAsync(Models.Notification notification) =>
+        await context.Notifications.AddAsync(notification);
+
+    public void Discard(Models.Notification notification)
+    {
+        foreach (var recipient in notification.Recipients)
+            context.Entry(recipient).State = EntityState.Detached;
+        context.Entry(notification).State = EntityState.Detached;
+    }
+
+    private IQueryable<Models.NotificationRecipient> InboxQuery(Guid userId, bool unreadOnly)
+    {
+        var query = context.NotificationRecipients.Where(r => r.FK_UserId == userId && r.IsActive);
+        return unreadOnly ? query.Where(r => !r.IsRead) : query;
+    }
+
+    public Task<int> GetInboxCountAsync(Guid userId, bool unreadOnly) =>
+        InboxQuery(userId, unreadOnly).CountAsync();
+
+    public Task<List<Models.NotificationRecipient>> GetInboxAsync(Guid userId, bool unreadOnly, int page, int pageSize) =>
+        InboxQuery(userId, unreadOnly)
+            .Include(r => r.Notification)
+            .OrderByDescending(r => r.Notification.CreatedAt)
+            .Skip((page - 1) * pageSize)
+            .Take(pageSize)
+            .AsNoTracking()
+            .ToListAsync();
+
+    public Task<int> GetUnreadCountAsync(Guid userId) =>
+        InboxQuery(userId, unreadOnly: true).CountAsync();
+
+    public Task<Models.NotificationRecipient?> GetRecipientAsync(Guid userId, Guid recipientId) =>
+        context.NotificationRecipients
+            .FirstOrDefaultAsync(r => r.Id == recipientId && r.FK_UserId == userId && r.IsActive);
+
+    public Task<List<Models.NotificationRecipient>> GetUnreadRecipientsAsync(Guid userId) =>
+        InboxQuery(userId, unreadOnly: true).ToListAsync();
+
+    public void RemoveRecipient(Models.NotificationRecipient recipient) =>
+        context.NotificationRecipients.Remove(recipient);
+
+    // ── Recipient resolution ─────────────────────────────────────────────
+
+    public Task<List<Guid>> FilterActiveUserIdsAsync(IEnumerable<Guid> userIds)
+    {
+        var ids = userIds.ToList();
+        return context.Users
+            .Where(u => u.IsActive && ids.Contains(u.Id))
+            .Select(u => u.Id)
+            .ToListAsync();
+    }
+
+    public Task<List<Guid>> GetUserIdsByPermissionAsync(string permissionCode) =>
+        context.Users
+            .Where(u => u.IsActive && context.RolePermissions.Any(rp =>
+                rp.FK_RoleId == u.FK_RoleId && rp.IsActive &&
+                rp.Permission.IsActive && rp.Permission.Code == permissionCode))
+            .Select(u => u.Id)
+            .ToListAsync();
+
+    public async Task<List<Guid>> GetUserIdsByScopeAsync(ScopeKind kind, Guid id)
+    {
+        Guid? regionId = null;
+        Guid? routeId = null;
+        Guid? storeId = null;
+
+        switch (kind)
+        {
+            case ScopeKind.Region:
+                regionId = id;
+                break;
+            case ScopeKind.Route:
+                routeId = id;
+                regionId = await context.Routes.Where(r => r.Id == id)
+                    .Select(r => (Guid?)r.FK_RegionId).FirstOrDefaultAsync();
+                break;
+            case ScopeKind.Store:
+                storeId = id;
+                routeId = await context.Stores.Where(s => s.Id == id)
+                    .Select(s => (Guid?)s.FK_RouteId).FirstOrDefaultAsync();
+                if (routeId is { } rid)
+                    regionId = await context.Routes.Where(r => r.Id == rid)
+                        .Select(r => (Guid?)r.FK_RegionId).FirstOrDefaultAsync();
+                break;
+        }
+
+        var userIds = new HashSet<Guid>();
+
+        if (regionId is { } region)
+            userIds.UnionWith(await context.UserRegionScopes
+                .Where(s => s.IsActive && s.FK_RegionId == region)
+                .Select(s => s.FK_UserId).ToListAsync());
+
+        if (routeId is { } route)
+            userIds.UnionWith(await context.UserRouteScopes
+                .Where(s => s.IsActive && s.FK_RouteId == route)
+                .Select(s => s.FK_UserId).ToListAsync());
+
+        if (storeId is { } store)
+            userIds.UnionWith(await context.UserStoreScopes
+                .Where(s => s.IsActive && s.FK_StoreId == store)
+                .Select(s => s.FK_UserId).ToListAsync());
+
+        return userIds.ToList();
+    }
+
+    public Task<Guid?> GetReportsToUserIdAsync(Guid userId) =>
+        context.Users.Where(u => u.Id == userId)
+            .Select(u => u.FK_ReportsToUserId)
+            .FirstOrDefaultAsync();
+
+    public async Task<Guid?> GetRouteOwnerUserIdAsync(ScopeKind kind, Guid id)
+    {
+        Guid? routeId = kind switch
+        {
+            ScopeKind.Route => id,
+            ScopeKind.Store => await context.Stores.Where(s => s.Id == id)
+                .Select(s => (Guid?)s.FK_RouteId).FirstOrDefaultAsync(),
+            _ => null
+        };
+        if (routeId is not { } rid) return null;
+
+        return await context.Routes.Where(r => r.Id == rid && r.IsActive)
+            .Select(r => r.FK_OwnerUserId)
+            .FirstOrDefaultAsync();
+    }
+
+    // ── Retention ────────────────────────────────────────────────────────
+
+    public Task<List<Models.NotificationRecipient>> GetExpiredReadRecipientsAsync(DateTime cutoff, int take) =>
+        context.NotificationRecipients
+            .Where(r => r.IsRead && r.ReadAt != null && r.ReadAt < cutoff)
+            .Take(take)
+            .ToListAsync();
+
+    public Task<List<Models.Notification>> GetOrphanNotificationsAsync(int take) =>
+        context.Notifications
+            .Where(n => !n.Recipients.Any())
+            .Take(take)
+            .ToListAsync();
+
+    public void RemoveRecipients(IEnumerable<Models.NotificationRecipient> recipients) =>
+        context.NotificationRecipients.RemoveRange(recipients);
+
+    public void RemoveNotifications(IEnumerable<Models.Notification> notifications) =>
+        context.Notifications.RemoveRange(notifications);
+}

Distribution/Features/Notifications/NotificationService.cs

@@ -0,0 +1,162 @@
+using System.Text.RegularExpressions;
+using Distribution.Features.Stock;
+using Distribution.Infra.UoW;
+using Microsoft.AspNetCore.SignalR;
+
+namespace Distribution.Features.Notifications;
+
+public interface INotificationService
+{
+    /// <summary>
+    /// Creates a notification for every resolved recipient and pushes it live. Best-effort: this method
+    /// never throws, so a notification problem can never fail the business action that triggered it.
+    /// Call it only AFTER the owning service's <c>uow.CommitAsync()</c> has succeeded.
+    /// </summary>
+    Task NotifyAsync(string type, IReadOnlyList<RecipientRule> recipients, NotificationArgs args, CancellationToken ct = default);
+}
+
+public class NotificationService(
+    INotificationRepository repo,
+    NotificationRecipientResolver resolver,
+    IHubContext<NotificationHub> hub,
+    IUnitOfWork uow,
+    ILogger<NotificationService> logger) : INotificationService
+{
+    private static readonly Regex TokenPattern = new(@"\{(\w+)\}", RegexOptions.Compiled);
+
+    // ── Trigger side ─────────────────────────────────────────────────────
+
+    public async Task NotifyAsync(string type, IReadOnlyList<RecipientRule> recipients, NotificationArgs args, CancellationToken ct = default)
+    {
+        try
+        {
+            if (!NotificationTypes.All.TryGetValue(type, out var definition))
+            {
+                logger.LogError("Notification type {Type} is not registered in NotificationTypes; skipped.", type);
+                return;
+            }
+
+            var userIds = await resolver.ResolveAsync(recipients, args.CreatedByUserId);
+            if (userIds.Count == 0) return;
+
+            var values = ToDictionary(args.Values);
+            var notification = new Models.Notification
+            {
+                Type = type,
+                Severity = definition.Severity,
+                Title = Truncate(Render(definition.TitleTemplate, values), 150),
+                Message = Truncate(Render(definition.MessageTemplate, values), 500),
+                EntityType = args.EntityType,
+                EntityId = args.EntityId,
+                Link = args.Link,
+                CreatedByUserId = args.CreatedByUserId,
+                CreatedAt = DateTime.Now,
+                Recipients = userIds.Select(id => new Models.NotificationRecipient { FK_UserId = id }).ToList()
+            };
+
+            await repo.AddAsync(notification);
+            try
+            {
+                await uow.CommitAsync(ct);
+            }
+            catch
+            {
+                repo.Discard(notification);
+                throw;
+            }
+
+            await PushAsync(notification);
+        }
+        catch (Exception ex)
+        {
+            logger.LogError(ex, "Failed to create {Type} notification for {EntityType} {EntityId}.",
+                type, args.EntityType, args.EntityId);
+        }
+    }
+
+    // Separate from persistence: a failed push still leaves the notification in the inbox.
+    private async Task PushAsync(Models.Notification notification)
+    {
+        foreach (var recipient in notification.Recipients)
+        {
+            try
+            {
+                await hub.Clients.User(recipient.FK_UserId.ToString())
+                    .SendAsync(NotificationHub.ClientEvent, ToResponse(notification, recipient));
+            }
+            catch (Exception ex)
+            {
+                logger.LogWarning(ex, "Failed to push notification {NotificationId} to user {UserId}.",
+                    notification.Id, recipient.FK_UserId);
+            }
+        }
+    }
+
+    // ── Inbox side ───────────────────────────────────────────────────────
+
+    public async Task<PagedResponse<NotificationResponse>> GetInboxAsync(Guid userId, bool unreadOnly, int page, int pageSize)
+    {
+        page = Math.Max(1, page);
+        pageSize = Math.Clamp(pageSize, 1, 100);
+
+        var total = await repo.GetInboxCountAsync(userId, unreadOnly);
+        var rows = await repo.GetInboxAsync(userId, unreadOnly, page, pageSize);
+        return new PagedResponse<NotificationResponse>(page, pageSize, total,
+            rows.Select(r => ToResponse(r.Notification, r)).ToList());
+    }
+
+    public async Task<UnreadCountResponse> GetUnreadCountAsync(Guid userId) =>
+        new(await repo.GetUnreadCountAsync(userId));
+
+    public async Task MarkReadAsync(Guid userId, Guid recipientId, CancellationToken ct = default)
+    {
+        var recipient = await repo.GetRecipientAsync(userId, recipientId)
+            ?? throw new KeyNotFoundException("Notification not found.");
+        if (recipient.IsRead) return;
+
+        recipient.IsRead = true;
+        recipient.ReadAt = DateTime.Now;
+        await uow.CommitAsync(ct);
+    }
+
+    public async Task MarkAllReadAsync(Guid userId, CancellationToken ct = default)
+    {
+        var unread = await repo.GetUnreadRecipientsAsync(userId);
+        if (unread.Count == 0) return;
+
+        var now = DateTime.Now;
+        foreach (var recipient in unread)
+        {
+            recipient.IsRead = true;
+            recipient.ReadAt = now;
+        }
+        await uow.CommitAsync(ct);
+    }
+
+    public async Task DeleteAsync(Guid userId, Guid recipientId, CancellationToken ct = default)
+    {
+        var recipient = await repo.GetRecipientAsync(userId, recipientId)
+            ?? throw new KeyNotFoundException("Notification not found.");
+
+        repo.RemoveRecipient(recipient);
+        await uow.CommitAsync(ct);
+    }
+
+    // ── Helpers ──────────────────────────────────────────────────────────
+
+    private static NotificationResponse ToResponse(Models.Notification n, Models.NotificationRecipient r) =>
+        new(r.Id, n.Type, n.Severity, n.Title, n.Message, n.EntityType, n.EntityId, n.Link,
+            n.CreatedAt, r.IsRead, r.ReadAt);
+
+    private static Dictionary<string, string> ToDictionary(object? values) =>
+        values is null
+            ? []
+            : values.GetType().GetProperties()
+                .ToDictionary(p => p.Name, p => p.GetValue(values)?.ToString() ?? string.Empty);
+
+    private static string Render(string template, Dictionary<string, string> values) =>
+        TokenPattern.Replace(template, m => values.TryGetValue(m.Groups[1].Value, out var v) ? v : string.Empty).Trim();
+
+    private static string Truncate(string value, int max) =>
+        value.Length <= max ? value : value[..(max - 1)] + "…";
+}

Distribution/Features/Notifications/NotificationTypes.cs

@@ -0,0 +1,49 @@
+using Distribution.Models;
+
+namespace Distribution.Features.Notifications;
+
+public record NotificationTypeDefinition(NotificationSeverity Severity, string TitleTemplate, string MessageTemplate);
+
+/// <summary>
+/// Registry of every notification type. Services must pass one of these constants to
+/// <see cref="INotificationService.NotifyAsync"/> — never a string literal. Templates use {Token}
+/// placeholders filled from <see cref="NotificationArgs.Values"/>.
+/// </summary>
+public static class NotificationTypes
+{
+    public const string RideCancelled = "RideCancelled";
+    public const string RideDriverAssigned = "RideDriverAssigned";
+    public const string DeliveryTaskFailed = "DeliveryTaskFailed";
+    public const string DeliveryTaskPartiallyDelivered = "DeliveryTaskPartiallyDelivered";
+    public const string SupplierClaimApproved = "SupplierClaimApproved";
+    public const string SupplierClaimRejected = "SupplierClaimRejected";
+    public const string ShopPOConfirmed = "ShopPOConfirmed";
+    public const string ShopPOCancelled = "ShopPOCancelled";
+    public const string StockLow = "StockLow";
+    public const string CreditLimitBreached = "CreditLimitBreached";
+
+    public static readonly IReadOnlyDictionary<string, NotificationTypeDefinition> All =
+        new Dictionary<string, NotificationTypeDefinition>
+        {
+            [RideCancelled] = new(NotificationSeverity.Critical,
+                "Ride cancelled", "A ride was cancelled ({CancelType}). {Reason}"),
+            [RideDriverAssigned] = new(NotificationSeverity.Info,
+                "Ride assigned", "You have been assigned to a ride."),
+            [DeliveryTaskFailed] = new(NotificationSeverity.Warning,
+                "Delivery failed", "Delivery to {StoreName} failed. {Note}"),
+            [DeliveryTaskPartiallyDelivered] = new(NotificationSeverity.Warning,
+                "Partial delivery", "Delivery to {StoreName} was only partly delivered."),
+            [SupplierClaimApproved] = new(NotificationSeverity.Success,
+                "Supplier claim approved", "Your supplier claim was approved."),
+            [SupplierClaimRejected] = new(NotificationSeverity.Warning,
+                "Supplier claim rejected", "Your supplier claim was rejected."),
+            [ShopPOConfirmed] = new(NotificationSeverity.Info,
+                "Shop order confirmed", "Shop order for {StoreName} was confirmed."),
+            [ShopPOCancelled] = new(NotificationSeverity.Warning,
+                "Shop order cancelled", "Shop order for {StoreName} was cancelled: {Reason}"),
+            [StockLow] = new(NotificationSeverity.Warning,
+                "Low stock", "{ItemName} is down to {Quantity} at {Location}."),
+            [CreditLimitBreached] = new(NotificationSeverity.Warning,
+                "Credit limit exceeded", "{StoreName} has exceeded its credit limit."),
+        };
+}

Distribution/Features/Notifications/RecipientRule.cs

@@ -0,0 +1,37 @@
+namespace Distribution.Features.Notifications;
+
+public enum ScopeKind { Region, Route, Store }
+
+/// <summary>
+/// Who a notification goes to. There is deliberately no "everyone" rule — every trigger must say who
+/// needs to know. Scope coverage follows Region → Route → Store: a region scope covers its routes
+/// and their stores, a route scope covers its stores.
+/// </summary>
+public abstract record RecipientRule
+{
+    /// <summary>These specific users (creator, driver, approver, route owner …).</summary>
+    public static RecipientRule Users(params Guid[] ids) => new UsersRule(ids);
+
+    /// <summary>Every active user whose role holds the permission code.</summary>
+    public static RecipientRule Permission(string code) => new PermissionRule(code);
+
+    /// <summary>Every active user whose scope covers the region / route / store.</summary>
+    public static RecipientRule Scope(ScopeKind kind, Guid id) => new ScopeRule(kind, id);
+
+    /// <summary>Users who hold the permission AND whose scope covers the region / route / store.</summary>
+    public static RecipientRule PermissionInScope(string code, ScopeKind kind, Guid id) =>
+        new PermissionInScopeRule(code, kind, id);
+
+    /// <summary>The user's supervisor (User.FK_ReportsToUserId).</summary>
+    public static RecipientRule ReportsTo(Guid userId) => new ReportsToRule(userId);
+
+    /// <summary>The owner of the route (<see cref="ScopeKind.Route"/>) or of the store's route (<see cref="ScopeKind.Store"/>).</summary>
+    public static RecipientRule RouteOwner(ScopeKind kind, Guid id) => new RouteOwnerRule(kind, id);
+}
+
+public sealed record UsersRule(IReadOnlyCollection<Guid> Ids) : RecipientRule;
+public sealed record PermissionRule(string Code) : RecipientRule;
+public sealed record ScopeRule(ScopeKind Kind, Guid Id) : RecipientRule;
+public sealed record PermissionInScopeRule(string Code, ScopeKind Kind, Guid Id) : RecipientRule;
+public sealed record ReportsToRule(Guid UserId) : RecipientRule;
+public sealed record RouteOwnerRule(ScopeKind Kind, Guid Id) : RecipientRule;

Distribution/Features/ProductReport/ProductReportRepository.cs

@@ -60,24 +60,24 @@ public class ProductReportRepository(AppDBContext db) : IProductReportRepository
         return (rows, total);
     }
 
-    // Sold = shop PO lines on non-cancelled POs whose invoice is Finalized, dated by Invoice.FinalizedAt.
-    private IQueryable<ShopPOItem> SoldLines(ProductReportFilter f)
+    // Sold = billable (non-removed) invoice lines of Finalized invoices on non-cancelled POs, dated by Invoice.FinalizedAt.
+    private IQueryable<InvoiceItem> SoldLines(ProductReportFilter f)
     {
         var lines =
-            from li in db.ShopPOItems.AsNoTracking()
-            join inv in db.Invoices.AsNoTracking() on li.FK_ShopPOId equals inv.FK_ShopPOId
-            where inv.Status == InvoiceStatus.Finalized
-                && li.ShopPO.Status != ShopPOStatus.Cancelled
-                && (!f.From.HasValue || inv.FinalizedAt >= f.From.Value)
-                && (!f.To.HasValue || inv.FinalizedAt < f.To.Value.Date.AddDays(1))
+            from li in db.InvoiceItems.AsNoTracking()
+            where li.IsActive && !li.IsRemoved
+                && li.Invoice.Status == InvoiceStatus.Finalized
+                && li.Invoice.ShopPO.Status != ShopPOStatus.Cancelled
+                && (!f.From.HasValue || li.Invoice.FinalizedAt >= f.From.Value)
+                && (!f.To.HasValue || li.Invoice.FinalizedAt < f.To.Value.Date.AddDays(1))
             select li;
 
         if (f.BrandId.HasValue) lines = lines.Where(l => l.Item.FK_BrandId == f.BrandId.Value);
         if (f.CategoryId.HasValue) lines = lines.Where(l => l.Item.FK_CategoryId == f.CategoryId.Value);
         if (f.SubCategoryId.HasValue) lines = lines.Where(l => l.Item.FK_SubCategoryId == f.SubCategoryId.Value);
-        if (f.StoreId.HasValue) lines = lines.Where(l => l.ShopPO.FK_StoreId == f.StoreId.Value);
-        if (f.RouteId.HasValue) lines = lines.Where(l => l.ShopPO.Store.FK_RouteId == f.RouteId.Value);
-        if (f.RegionId.HasValue) lines = lines.Where(l => l.ShopPO.Store.Route.FK_RegionId == f.RegionId.Value);
+        if (f.StoreId.HasValue) lines = lines.Where(l => l.Invoice.ShopPO.FK_StoreId == f.StoreId.Value);
+        if (f.RouteId.HasValue) lines = lines.Where(l => l.Invoice.ShopPO.Store.FK_RouteId == f.RouteId.Value);
+        if (f.RegionId.HasValue) lines = lines.Where(l => l.Invoice.ShopPO.Store.Route.FK_RegionId == f.RegionId.Value);
         if (!string.IsNullOrWhiteSpace(f.Search))
         {
             var s = f.Search.Trim();
@@ -93,33 +93,36 @@ public class ProductReportRepository(AppDBContext db) : IProductReportRepository
             .Select(g => new
             {
                 g.Key.FK_ItemId, g.Key.Sku, g.Key.Name, g.Key.CostPrice,
-                Orders = g.Select(x => x.FK_ShopPOId).Distinct().Count(),
-                QtyOrdered = g.Sum(x => (decimal)x.Quantity),
-                QtyFulfilled = g.Sum(x => (decimal)x.QuantityFulfilled),
-                SalesValue = g.Sum(x => x.QuantityFulfilled * x.UnitPrice),
+                QtyOrdered = g.Sum(x => (decimal)(x.ShopPOItem != null ? x.ShopPOItem.Quantity : x.Quantity)),
+                QtyFulfilled = g.Sum(x => (decimal)x.Quantity),
+                SalesValue = g.Sum(x => x.Quantity * x.UnitPrice),
             });
 
         var total = await query.CountAsync();
         var page_ = await query.OrderByDescending(r => r.SalesValue).ThenBy(r => r.Name)
             .Skip((page - 1) * pageSize).Take(pageSize).ToListAsync();
 
-        // Distinct stores per item is counted separately: MySQL can't run the correlated
+        // Distinct orders and stores per item are counted separately: MySQL can't run the correlated
         // "SELECT DISTINCT ... WHERE outer.col" derived table EF generates inside a GroupBy.
         var ids = page_.Select(r => r.FK_ItemId).ToList();
-        var storePairs = await SoldLines(f)
+        var pairs = await SoldLines(f)
             .Where(l => ids.Contains(l.FK_ItemId))
-            .Select(l => new { l.FK_ItemId, l.ShopPO.FK_StoreId })
+            .Select(l => new { l.FK_ItemId, PoId = l.Invoice.FK_ShopPOId, l.Invoice.ShopPO.FK_StoreId })
             .Distinct()
             .ToListAsync();
-        var storeCounts = storePairs.GroupBy(p => p.FK_ItemId).ToDictionary(g => g.Key, g => g.Count());
+        var orderCounts = pairs.GroupBy(p => p.FK_ItemId)
+            .ToDictionary(g => g.Key, g => g.Select(p => p.PoId).Distinct().Count());
+        var storeCounts = pairs.GroupBy(p => p.FK_ItemId)
+            .ToDictionary(g => g.Key, g => g.Select(p => p.FK_StoreId).Distinct().Count());
 
         var rows = page_.Select(r => new SalesAggregate(r.FK_ItemId, r.Sku, r.Name, r.CostPrice,
-            r.Orders, storeCounts.GetValueOrDefault(r.FK_ItemId), r.QtyOrdered, r.QtyFulfilled, r.SalesValue)).ToList();
+            orderCounts.GetValueOrDefault(r.FK_ItemId), storeCounts.GetValueOrDefault(r.FK_ItemId),
+            r.QtyOrdered, r.QtyFulfilled, r.SalesValue)).ToList();
         return (rows, total);
     }
 
     public Task<decimal> GetTotalSalesAsync(ProductReportFilter f) =>
-        SoldLines(f).SumAsync(x => x.QuantityFulfilled * x.UnitPrice);
+        SoldLines(f).SumAsync(x => x.Quantity * x.UnitPrice);
 
     public async Task<Dictionary<Guid, decimal>> GetSoldQtyAsync(ProductReportFilter f, IEnumerable<Guid> itemIds)
     {
@@ -127,7 +130,7 @@ public class ProductReportRepository(AppDBContext db) : IProductReportRepository
         return await SoldLines(f with { Search = null })
             .Where(l => ids.Contains(l.FK_ItemId))
             .GroupBy(l => l.FK_ItemId)
-            .Select(g => new { g.Key, Qty = g.Sum(x => (decimal)x.QuantityFulfilled) })
+            .Select(g => new { g.Key, Qty = g.Sum(x => (decimal)x.Quantity) })
             .ToDictionaryAsync(x => x.Key, x => x.Qty);
     }
 

Distribution/Features/Ride/RideService.cs

@@ -1,4 +1,6 @@
-using Distribution.Features.Stock;
+using Distribution.Features.DeliveryRide;
+using Distribution.Features.Notifications;
+using Distribution.Features.Stock;
 using Distribution.Features.DriverComplianceConfig;
 using Distribution.Features.DriverProfile;
 using Distribution.Infra.UoW;
@@ -10,9 +12,14 @@ public class RideService(
     IRideRepository rideRepo,
     IDriverProfileRepository driverRepo,
     IDriverComplianceConfigRepository complianceRepo,
+    IDeliveryTaskRepository taskRepo,
     StockMover mover,
+    INotificationService notifications,
+    ILogger<RideService> logger,
     IUnitOfWork uow)
 {
+    private const string RidesLink = "/operations/rides";
+
     public async Task<PagedResponse<RideResponse>> GetAllAsync(RideStatus? status, Guid? driverProfileId, Guid? vehicleId, int page, int pageSize)
     {
         var total = await rideRepo.GetCountAsync(status, driverProfileId, vehicleId);
@@ -72,6 +79,12 @@ public class RideService(
         try { rideRepo.Update(ride); await uow.CommitAsync(ct); }
         catch { await uow.RollbackAsync(ct); throw; }
 
+        await notifications.NotifyAsync(
+            NotificationTypes.RideDriverAssigned,
+            [RecipientRule.Users(driver.FK_UserId)],
+            new NotificationArgs(null, "Ride", rideId, RidesLink),
+            ct);
+
         var saved = await rideRepo.GetByIdAsync(rideId);
         return ToResponse(saved!);
     }
@@ -125,9 +138,46 @@ public class RideService(
         }
         catch { await uow.RollbackAsync(ct); throw; }
 
+        await NotifyRideCancelledAsync(ride, request, userId, ct);
+
         return ToResponse(ride);
     }
 
+    // A ride has no route of its own; the people to tell are the owners and managers of the routes
+    // its delivery tasks go to. Best-effort: the ride is already cancelled, so nothing here may throw.
+    private async Task NotifyRideCancelledAsync(DeliveryRun ride, CancelRideRequest request, Guid userId, CancellationToken ct)
+    {
+        try
+        {
+            var tasks = await taskRepo.GetByRideIdAsync(ride.Id);
+            var routeIds = tasks
+                .Where(t => t.ShopPO?.Store is not null)
+                .Select(t => t.ShopPO.Store.FK_RouteId)
+                .Distinct()
+                .ToList();
+
+            var recipients = new List<RecipientRule>();
+            foreach (var routeId in routeIds)
+            {
+                recipients.Add(RecipientRule.RouteOwner(ScopeKind.Route, routeId));
+                recipients.Add(RecipientRule.PermissionInScope("delivery-task.manage", ScopeKind.Route, routeId));
+            }
+            if (recipients.Count == 0) return;
+
+            await notifications.NotifyAsync(
+                NotificationTypes.RideCancelled,
+                recipients,
+                new NotificationArgs(
+                    new { CancelType = request.TypeCode, Reason = request.Reason },
+                    "Ride", ride.Id, RidesLink, userId),
+                ct);
+        }
+        catch (Exception ex)
+        {
+            logger.LogError(ex, "Failed to build RideCancelled notification for ride {RideId}.", ride.Id);
+        }
+    }
+
     private async Task CheckDriverComplianceAsync(Guid driverProfileId)
     {
         var driver = await driverRepo.GetByIdAsync(driverProfileId)

Distribution/Features/Scheme/ISchemeRepository.cs

@@ -10,7 +10,10 @@ public interface ISchemeRepository
 
     Task<List<Models.SchemeRedemption>> GetRedemptionsAsync(Guid schemeId);
     Task AddRedemptionAsync(Models.SchemeRedemption entity);
+    Task<List<Models.SchemeRedemption>> GetRedemptionsByShopPOAsync(Guid shopPOId);
+    void RemoveRedemption(Models.SchemeRedemption entity);
     Task<bool> HasRedemptionAsync(Guid schemeId, Guid orderId);
+    Task<bool> HasLockedInvoiceAsync(Guid shopPOId);
 
     Task<Models.SchemeBundleComponent?> GetBundleComponentAsync(Guid schemeId, Guid itemId);
     Task AddBundleComponentAsync(Models.SchemeBundleComponent entity);

Distribution/Features/Scheme/SchemeController.cs

@@ -112,6 +112,14 @@ public class SchemeController(SchemeService service) : ControllerBase
         return result is null ? NotFound() : Ok(result);
     }
 
+    [HttpPost("suggest")]
+    [Authorize("scheme.view")]
+    public async Task<IActionResult> Suggest(SuggestSchemesRequest request)
+    {
+        var result = await service.SuggestAsync(request);
+        return result is null ? NotFound() : Ok(result);
+    }
+
     [HttpGet("{id:guid}/spend")]
     [Authorize("scheme.view")]
     public async Task<IActionResult> GetSpend(Guid id)

Distribution/Features/Scheme/SchemeDTOs.cs

@@ -94,7 +94,13 @@ public record SchemeEligibilityResponse(
     string? Reason,
     decimal? DiscountAmount,
     Guid? FreeItemId,
-    decimal? FreeQty);
+    decimal? FreeQty,
+    string? FreeItemName = null);
+
+/// <summary>A cart line for scheme suggestion before the Shop PO exists. UnitPrice null = resolve from the price list.</summary>
+public record SuggestLine(Guid ItemId, int Quantity, decimal? UnitPrice = null, bool IsFree = false);
+
+public record SuggestSchemesRequest(Guid StoreId, List<SuggestLine> Items);
 
 public record SchemeRedemptionResponse(
     Guid Id,

Distribution/Features/Scheme/SchemeRepository.cs

@@ -49,9 +49,25 @@ public class SchemeRepository(AppDBContext context) : ISchemeRepository
     public async Task AddRedemptionAsync(Models.SchemeRedemption entity) =>
         await context.SchemeRedemptions.AddAsync(entity);
 
+    public async Task<List<Models.SchemeRedemption>> GetRedemptionsByShopPOAsync(Guid shopPOId)
+    {
+        var list = await context.SchemeRedemptions.Include(r => r.Scheme).Where(r => r.FK_ShopPOId == shopPOId).ToListAsync();
+        // Rows added earlier in this unit of work are not in the database yet; rows removed are still there.
+        foreach (var added in context.SchemeRedemptions.Local.Where(r => r.FK_ShopPOId == shopPOId && !list.Contains(r)))
+            list.Add(added);
+        return list.Where(r => context.Entry(r).State != EntityState.Deleted).ToList();
+    }
+
+    public void RemoveRedemption(Models.SchemeRedemption entity) =>
+        context.SchemeRedemptions.Remove(entity);
+
     public async Task<bool> HasRedemptionAsync(Guid schemeId, Guid shopPOId) =>
         await context.SchemeRedemptions.AnyAsync(r => r.FK_SchemeId == schemeId && r.FK_ShopPOId == shopPOId);
 
+    // An invoice past Draft (printed or finalized) has a fixed amount, so it can no longer take a discount.
+    public async Task<bool> HasLockedInvoiceAsync(Guid shopPOId) =>
+        await context.Invoices.AnyAsync(i => i.FK_ShopPOId == shopPOId && i.IsActive && i.Status != Models.InvoiceStatus.Draft);
+
     public async Task<Models.SchemeBundleComponent?> GetBundleComponentAsync(Guid schemeId, Guid itemId) =>
         await context.SchemeBundleComponents
             .FirstOrDefaultAsync(c => c.FK_SchemeId == schemeId && c.FK_ItemId == itemId);

Distribution/Features/Scheme/SchemeService.cs

@@ -1,5 +1,7 @@
 using System.Text.Json;
+using Distribution.Features.Invoice;
 using Distribution.Features.Item;
+using Distribution.Features.PriceList;
 using Distribution.Features.ShopPO;
 using Distribution.Features.Stock;
 using Distribution.Features.Store;
@@ -14,6 +16,8 @@ public class SchemeService(
     IItemRepository itemRepo,
     IStoreRepository storeRepo,
     IStockRepository stockRepo,
+    IInvoiceRepository invoiceRepo,
+    PriceListService priceListService,
     IUnitOfWork uow)
 {
     private static readonly JsonSerializerOptions JsonOptions = new(JsonSerializerDefaults.Web);
@@ -261,12 +265,7 @@ public class SchemeService(
 
         foreach (var scheme in candidates)
         {
-            if (scheme.FK_RegionId.HasValue && scheme.FK_RegionId != regionId)
-                continue;
-            if (!string.IsNullOrEmpty(scheme.EligibleSegment) &&
-                !string.Equals(scheme.EligibleSegment, store.Segment, StringComparison.OrdinalIgnoreCase))
-                continue;
-            if (shopPO.CreatedAt < scheme.DateRangeFrom || shopPO.CreatedAt > scheme.DateRangeTo)
+            if (!IsInScope(scheme, store.Segment, regionId, shopPO.CreatedAt))
                 continue;
 
             result.Add(EvaluateRule(scheme, items));
@@ -275,6 +274,328 @@ public class SchemeService(
         return result;
     }
 
+    private static bool IsInScope(Models.Scheme scheme, string? storeSegment, Guid? storeRegionId, DateTime asOf)
+    {
+        if (scheme.FK_RegionId.HasValue && scheme.FK_RegionId != storeRegionId) return false;
+        if (!string.IsNullOrEmpty(scheme.EligibleSegment) &&
+            !string.Equals(scheme.EligibleSegment, storeSegment, StringComparison.OrdinalIgnoreCase)) return false;
+        return asOf >= scheme.DateRangeFrom && asOf.Date <= scheme.DateRangeTo.Date;
+    }
+
+    /// <summary>
+    /// Suggestions for a Shop PO that is still being built (nothing saved yet). Returns eligible schemes,
+    /// plus BuyXGetY/FreeBundle schemes the cart is part-way to, so the UI can nudge ("add 4 more").
+    /// </summary>
+    public async Task<List<SchemeEligibilityResponse>?> SuggestAsync(SuggestSchemesRequest request)
+    {
+        var store = await storeRepo.GetByIdWithRegionAsync(request.StoreId);
+        if (store is null || !store.IsActive) return null;
+
+        var lines = new List<ShopPOItem>();
+        foreach (var l in request.Items.Where(i => !i.IsFree))
+        {
+            var price = l.UnitPrice
+                ?? (await priceListService.ResolveByStoreAsync(l.ItemId, request.StoreId, DateTime.Now))?.Price
+                ?? 0m;
+            lines.Add(new ShopPOItem { FK_ItemId = l.ItemId, Quantity = l.Quantity, UnitPrice = price });
+        }
+
+        var regionId = store.Route?.FK_RegionId;
+        var inCart = lines.Select(l => l.FK_ItemId).ToHashSet();
+        var result = new List<SchemeEligibilityResponse>();
+
+        foreach (var scheme in (await repo.GetAllAsync()).Where(s => s.IsActive))
+        {
+            if (!IsInScope(scheme, store.Segment, regionId, DateTime.Now)) continue;
+
+            var eval = EvaluateRule(scheme, lines);
+            var relevant = eval.Eligible || scheme.RuleType switch
+            {
+                SchemeRuleType.BuyXGetY => scheme.FK_TriggerItemId.HasValue && inCart.Contains(scheme.FK_TriggerItemId.Value),
+                SchemeRuleType.FreeBundle => scheme.BundleComponents.Any(c => inCart.Contains(c.FK_ItemId)),
+                _ => false
+            };
+            if (!relevant) continue;
+
+            result.Add(eval with { FreeItemName = scheme.FreeItem?.Name });
+        }
+
+        return result;
+    }
+
+    /// <summary>
+    /// Checks the free lines of a Shop PO that is about to be saved: each must reference an in-scope scheme the
+    /// paid lines still qualify for, be the scheme's free item, stay within the entitled qty, and be in stock.
+    /// Stamps the scheme-name snapshot and forces UnitPrice to 0. Read-only; throws InvalidOperationException.
+    /// </summary>
+    public async Task ValidateFreeLinesAsync(Guid storeId, DateTime asOf, List<ShopPOItem> lines)
+    {
+        var freeLines = lines.Where(l => l.IsFree).ToList();
+        if (freeLines.Count == 0) return;
+
+        if (freeLines.Any(l => l.FK_SchemeId is null))
+            throw new InvalidOperationException("A free-issue line must reference the scheme that granted it.");
+        if (freeLines.Any(l => l.Quantity <= 0))
+            throw new InvalidOperationException("Free-issue quantity must be greater than zero (remove the line instead).");
+
+        var store = await storeRepo.GetByIdWithRegionAsync(storeId)
+            ?? throw new InvalidOperationException("Store not found.");
+        var regionId = store.Route?.FK_RegionId;
+
+        foreach (var group in freeLines.GroupBy(l => l.FK_SchemeId!.Value))
+        {
+            var scheme = await repo.GetByIdAsync(group.Key);
+            if (scheme is null || !scheme.IsActive)
+                throw new InvalidOperationException("A free-issue line references a scheme that no longer exists.");
+            if (!IsInScope(scheme, store.Segment, regionId, asOf))
+                throw new InvalidOperationException($"Scheme '{scheme.Name}' is not available for this store or date.");
+
+            var eval = EvaluateRule(scheme, lines);
+            if (!eval.Eligible || eval.FreeItemId is null || eval.FreeQty is null)
+                throw new InvalidOperationException(eval.Reason ?? $"Order no longer qualifies for scheme '{scheme.Name}'.");
+            if (group.Any(l => l.FK_ItemId != eval.FreeItemId))
+                throw new InvalidOperationException($"Scheme '{scheme.Name}' grants a different free item.");
+
+            var qty = group.Sum(l => l.Quantity);
+            if (qty > eval.FreeQty.Value)
+                throw new InvalidOperationException($"Free quantity {qty} exceeds the {eval.FreeQty.Value:0.##} entitled by scheme '{scheme.Name}'.");
+
+            var available = (await stockRepo.GetBalancesByItemAsync(eval.FreeItemId.Value)).Sum(b => b.Quantity);
+            if (available < qty)
+                throw new InvalidOperationException($"Insufficient stock to give {qty} free of scheme '{scheme.Name}'.");
+
+            foreach (var l in group)
+            {
+                l.UnitPrice = 0m;
+                l.SchemeName = scheme.Name;
+            }
+        }
+    }
+
+    /// <summary>
+    /// Checks the percentage-discount schemes (FlatPercent / SlabDiscount) the user accepted for a Shop PO that is
+    /// about to be saved: one at most, in scope, and the paid lines must still qualify. Read-only; throws.
+    /// </summary>
+    public async Task ValidateDiscountSchemesAsync(Guid storeId, DateTime asOf, List<ShopPOItem> lines, List<Guid>? schemeIds)
+    {
+        if (schemeIds is not { Count: > 0 }) return;
+        if (schemeIds.Distinct().Count() > 1)
+            throw new InvalidOperationException("Only one discount scheme can be applied to an order.");
+
+        var store = await storeRepo.GetByIdWithRegionAsync(storeId)
+            ?? throw new InvalidOperationException("Store not found.");
+
+        var scheme = await repo.GetByIdAsync(schemeIds[0]);
+        if (scheme is null || !scheme.IsActive)
+            throw new InvalidOperationException("The selected discount scheme no longer exists.");
+        if (scheme.RuleType is not (SchemeRuleType.FlatPercent or SchemeRuleType.SlabDiscount))
+            throw new InvalidOperationException($"Scheme '{scheme.Name}' is not a discount scheme.");
+        if (!IsInScope(scheme, store.Segment, store.Route?.FK_RegionId, asOf))
+            throw new InvalidOperationException($"Scheme '{scheme.Name}' is not available for this store or date.");
+
+        var eval = EvaluateRule(scheme, lines);
+        if (!eval.Eligible)
+            throw new InvalidOperationException(eval.Reason ?? $"Order does not qualify for scheme '{scheme.Name}'.");
+    }
+
+    /// <summary>
+    /// Re-evaluates the percentage discounts redeemed against a Shop PO for the given (invoice) lines and returns
+    /// their total. With persist = true the redemption amounts are updated too (the caller commits), so spend/ROI and
+    /// the invoice stay in step; a discount the lines no longer qualify for drops to 0 and comes back if they requalify.
+    /// </summary>
+    public async Task<decimal> CalculateDiscountAsync(Guid shopPOId, IEnumerable<ShopPOItem> lines, bool persist)
+    {
+        var priced = lines.ToList();
+        decimal total = 0m;
+        foreach (var r in (await repo.GetRedemptionsByShopPOAsync(shopPOId)).Where(r => r.DiscountAmount.HasValue))
+        {
+            var scheme = await repo.GetByIdAsync(r.FK_SchemeId);
+            var eval = scheme is null ? null : EvaluateRule(scheme, priced);
+            var amount = eval is { Eligible: true, DiscountAmount: not null } ? eval.DiscountAmount.Value : 0m;
+            if (persist) r.DiscountAmount = amount;
+            total += amount;
+        }
+        return total;
+    }
+
+    // How many free units each scheme currently entitles for these paid lines (0 when no longer eligible).
+    private async Task<Dictionary<Guid, int>> FreeEntitlementsAsync(IEnumerable<Guid> schemeIds, List<ShopPOItem> paidLines)
+    {
+        var result = new Dictionary<Guid, int>();
+        foreach (var id in schemeIds.Distinct())
+        {
+            var scheme = await repo.GetByIdAsync(id);
+            var eval = scheme is null ? null : EvaluateRule(scheme, paidLines);
+            result[id] = eval is { Eligible: true, FreeQty: not null } ? (int)Math.Floor(eval.FreeQty.Value) : 0;
+        }
+        return result;
+    }
+
+    /// <summary>
+    /// Free-issue entitlement per scheme for unsaved invoice lines (editor preview). Lines carry IsFree / scheme id;
+    /// only the paid ones count toward the scheme rules.
+    /// </summary>
+    public async Task<Dictionary<Guid, int>> GetFreeEntitlementsAsync(IEnumerable<Guid> schemeIds, IEnumerable<ShopPOItem> lines) =>
+        await FreeEntitlementsAsync(schemeIds, lines.Where(l => !l.IsFree).ToList());
+
+    /// <summary>
+    /// Keeps an invoice's free-issue lines within what the remaining paid lines still earn: when the paid quantity of the
+    /// qualifying item is lowered (or removed), the free quantity is reduced to match (a line that earns nothing is struck
+    /// out) and the PO's redemption is resized. Stages changes only. Returns true if any free line was changed.
+    /// </summary>
+    public async Task<bool> ReconcileInvoiceFreeLinesAsync(Guid shopPOId, List<InvoiceItem> lines)
+    {
+        var freeLines = lines.Where(l => l.IsActive && l.IsFree && l.FK_SchemeId.HasValue).ToList();
+        if (freeLines.Count == 0) return false;
+
+        var paid = lines.Where(l => l.IsActive && !l.IsRemoved && !l.IsFree)
+            .Select(l => new ShopPOItem { FK_ItemId = l.FK_ItemId, Quantity = l.Quantity, UnitPrice = l.UnitPrice })
+            .ToList();
+        var entitled = await FreeEntitlementsAsync(freeLines.Select(l => l.FK_SchemeId!.Value), paid);
+        var redemptions = await repo.GetRedemptionsByShopPOAsync(shopPOId);
+        var changed = false;
+
+        foreach (var group in freeLines.GroupBy(l => l.FK_SchemeId!.Value))
+        {
+            var remaining = entitled[group.Key];
+            foreach (var line in group.Where(l => !l.IsRemoved).OrderBy(l => l.CreatedAt))
+            {
+                if (line.Quantity <= remaining) { remaining -= line.Quantity; continue; }
+
+                if (remaining == 0) line.IsRemoved = true;
+                else line.Quantity = remaining;
+                remaining = 0;
+                changed = true;
+            }
+
+            var redemption = redemptions.FirstOrDefault(r => r.FK_SchemeId == group.Key && r.FK_FreeItemId.HasValue);
+            if (redemption is not null)
+                redemption.FreeQty = group.Where(l => !l.IsRemoved).Sum(l => l.Quantity);
+        }
+
+        return changed;
+    }
+
+    /// <summary>
+    /// Discount the given schemes would give for these lines, without touching any redemption (editor preview).
+    /// </summary>
+    public async Task<decimal> CalculateDiscountForSchemesAsync(IEnumerable<Guid> schemeIds, IEnumerable<ShopPOItem> lines)
+    {
+        var priced = lines.ToList();
+        decimal total = 0m;
+        foreach (var id in schemeIds.Distinct())
+        {
+            var scheme = await repo.GetByIdAsync(id);
+            var eval = scheme is null ? null : EvaluateRule(scheme, priced);
+            if (eval is { Eligible: true, DiscountAmount: not null }) total += eval.DiscountAmount.Value;
+        }
+        return total;
+    }
+
+    /// <summary>
+    /// Applies the discount choice made on a Draft invoice (the percentage scheme the user accepted, or none) to the
+    /// PO's redemptions: newly chosen schemes are validated and added, unchosen ones removed. The amount itself is
+    /// then set by CalculateDiscountAsync when the totals are re-derived. Stages changes only. Null = leave as is.
+    /// </summary>
+    public async Task ApplyInvoiceDiscountSelectionAsync(Guid shopPOId, Guid storeId, List<InvoiceItem> lines, List<Guid>? schemeIds)
+    {
+        if (schemeIds is null) return;
+        if (schemeIds.Distinct().Count() > 1)
+            throw new InvalidOperationException("Only one discount scheme can be applied to an order.");
+
+        var existing = (await repo.GetRedemptionsByShopPOAsync(shopPOId)).Where(r => r.DiscountAmount.HasValue).ToList();
+        foreach (var r in existing.Where(r => !schemeIds.Contains(r.FK_SchemeId)))
+            repo.RemoveRedemption(r);
+
+        var paid = lines.Where(l => l.IsActive && !l.IsRemoved && !l.IsFree)
+            .Select(l => new ShopPOItem { FK_ItemId = l.FK_ItemId, Quantity = l.Quantity, UnitPrice = l.UnitPrice })
+            .ToList();
+        var added = schemeIds.Where(id => existing.All(r => r.FK_SchemeId != id)).ToList();
+        await ValidateDiscountSchemesAsync(storeId, DateTime.Now, paid, added);
+
+        foreach (var id in added)
+            await repo.AddRedemptionAsync(new SchemeRedemption { FK_SchemeId = id, FK_ShopPOId = shopPOId, DiscountAmount = 0m });
+    }
+
+    /// <summary>Discounts already redeemed against a Shop PO, for display and for editing.</summary>
+    public async Task<List<ShopPODiscountResponse>> GetDiscountsForShopPOAsync(Guid shopPOId) =>
+        (await repo.GetRedemptionsByShopPOAsync(shopPOId))
+            .Where(r => r.DiscountAmount.HasValue)
+            .Select(r => new ShopPODiscountResponse(r.FK_SchemeId, r.Scheme?.Name ?? string.Empty, r.DiscountAmount!.Value))
+            .ToList();
+
+    /// <summary>
+    /// Brings the Shop PO's scheme redemptions in line with its saved lines: free-goods redemptions follow the
+    /// free lines (created, resized or removed), discount redemptions are recomputed or dropped if the order no
+    /// longer qualifies. Stages changes only — the caller owns the commit.
+    /// </summary>
+    public async Task SyncRedemptionsAsync(Guid shopPOId, List<ShopPOItem> lines, List<Guid>? discountSchemeIds = null)
+    {
+        var existing = await repo.GetRedemptionsByShopPOAsync(shopPOId);
+        var freeBySchemes = lines.Where(l => l.IsFree && l.FK_SchemeId.HasValue)
+            .GroupBy(l => l.FK_SchemeId!.Value).ToDictionary(g => g.Key, g => g.ToList());
+
+        foreach (var r in existing)
+        {
+            if (r.FK_FreeItemId.HasValue)
+            {
+                if (!freeBySchemes.ContainsKey(r.FK_SchemeId)) repo.RemoveRedemption(r);
+            }
+            else if (r.DiscountAmount.HasValue)
+            {
+                // A null list means "leave the accepted discounts alone" (just recompute them).
+                if (discountSchemeIds is not null && !discountSchemeIds.Contains(r.FK_SchemeId))
+                {
+                    repo.RemoveRedemption(r);
+                    continue;
+                }
+
+                var scheme = await repo.GetByIdAsync(r.FK_SchemeId);
+                var eval = scheme is null ? null : EvaluateRule(scheme, lines);
+                if (eval is { Eligible: true, DiscountAmount: not null }) r.DiscountAmount = eval.DiscountAmount;
+                else repo.RemoveRedemption(r);
+            }
+        }
+
+        foreach (var schemeId in discountSchemeIds ?? [])
+        {
+            if (existing.Any(r => r.FK_SchemeId == schemeId && r.DiscountAmount.HasValue)) continue;
+            var scheme = await repo.GetByIdAsync(schemeId);
+            var eval = scheme is null ? null : EvaluateRule(scheme, lines);
+            if (eval is { Eligible: true, DiscountAmount: not null })
+                await repo.AddRedemptionAsync(new SchemeRedemption
+                {
+                    FK_SchemeId = schemeId,
+                    FK_ShopPOId = shopPOId,
+                    DiscountAmount = eval.DiscountAmount
+                });
+        }
+
+        foreach (var (schemeId, group) in freeBySchemes)
+        {
+            var freeItem = await itemRepo.GetByIdAsync(group[0].FK_ItemId)
+                ?? throw new InvalidOperationException("Free item not found.");
+            var qty = group.Sum(l => l.Quantity);
+            var redemption = existing.FirstOrDefault(r => r.FK_SchemeId == schemeId && r.FK_FreeItemId.HasValue);
+
+            if (redemption is null)
+                await repo.AddRedemptionAsync(new SchemeRedemption
+                {
+                    FK_SchemeId = schemeId,
+                    FK_ShopPOId = shopPOId,
+                    FK_FreeItemId = freeItem.Id,
+                    FreeQty = qty,
+                    FreeItemCostValue = freeItem.CostPrice ?? 0m
+                });
+            else
+            {
+                redemption.FK_FreeItemId = freeItem.Id;
+                redemption.FreeQty = qty;
+                redemption.FreeItemCostValue = freeItem.CostPrice ?? 0m;
+            }
+        }
+    }
+
     /// <summary>
     /// Scope-only check (region, segment, date range as of today) with no ShopPO to evaluate line
     /// items against — used by Store Management's `checkStoreSchemeEligibility(storeId, schemeId)`
@@ -299,14 +620,18 @@ public class SchemeService(
             return (false, $"Scheme is only available to the '{scheme.EligibleSegment}' segment.");
 
         var today = DateTime.Now;
-        if (today < scheme.DateRangeFrom || today > scheme.DateRangeTo)
+        if (today < scheme.DateRangeFrom || today.Date > scheme.DateRangeTo.Date)
             return (false, "Scheme is not currently active (outside its date range).");
 
         return (true, null);
     }
 
-    private static SchemeEligibilityResponse EvaluateRule(Models.Scheme scheme, List<ShopPOItem> items)
+    private static SchemeEligibilityResponse EvaluateRule(Models.Scheme scheme, List<ShopPOItem> allItems)
     {
+        // Free-issue lines (added by a previous redemption) must not count toward a trigger/bundle
+        // quantity, otherwise the free units inflate the multiplier.
+        var items = allItems.Where(i => !i.IsFree && i.UnitPrice > 0).ToList();
+
         switch (scheme.RuleType)
         {
             case SchemeRuleType.BuyXGetY:
@@ -383,6 +708,9 @@ public class SchemeService(
         if (await repo.HasRedemptionAsync(schemeId, shopPOId))
             throw new InvalidOperationException("This scheme has already been redeemed against this ShopPO.");
 
+        if (await repo.HasLockedInvoiceAsync(shopPOId))
+            throw new InvalidOperationException("This order's invoice is already printed or finalized, so a scheme can no longer be applied. Apply schemes before the invoice is printed.");
+
         var items = await shopPORepo.GetActiveItemsByShopPOIdAsync(shopPOId);
         var eligibility = EvaluateRule(scheme, items);
         if (!eligibility.Eligible)
@@ -411,7 +739,10 @@ public class SchemeService(
                 FK_ShopPOId = shopPOId,
                 FK_ItemId = freeItem.Id,
                 Quantity = (int)eligibility.FreeQty.Value,
-                UnitPrice = 0m
+                UnitPrice = 0m,
+                IsFree = true,
+                FK_SchemeId = scheme.Id,
+                SchemeName = scheme.Name
             });
 
             redemption.FK_FreeItemId = freeItem.Id;
@@ -422,7 +753,27 @@ public class SchemeService(
         await uow.BeginAsync(ct);
         try
         {
-            if (newItems.Count > 0) await shopPORepo.AddItemsAsync(newItems);
+            if (newItems.Count > 0)
+            {
+                await shopPORepo.AddItemsAsync(newItems);
+
+                // A still-draft invoice was copied from the PO before this line existed, so mirror it there.
+                if (shopPO.InvoiceId is Guid invoiceId &&
+                    await invoiceRepo.GetByIdAsync(invoiceId) is { Status: InvoiceStatus.Draft })
+                {
+                    await invoiceRepo.AddItemsAsync(newItems.Select(n => new InvoiceItem
+                    {
+                        FK_InvoiceId = invoiceId,
+                        FK_ShopPOItemId = n.Id,
+                        FK_ItemId = n.FK_ItemId,
+                        Quantity = n.Quantity,
+                        UnitPrice = 0m,
+                        IsFree = true,
+                        FK_SchemeId = n.FK_SchemeId,
+                        SchemeName = n.SchemeName
+                    }));
+                }
+            }
             await repo.AddRedemptionAsync(redemption);
             await uow.CommitAsync(ct);
         }
@@ -484,6 +835,8 @@ public class SchemeService(
 
         if (freeItemId is null || freeQty is null or <= 0)
             throw new InvalidOperationException("FreeItemId and a positive FreeQty are required.");
+        if (freeQty.Value != decimal.Truncate(freeQty.Value))
+            throw new InvalidOperationException("FreeQty must be a whole number (order lines hold whole units).");
         if (await itemRepo.GetByIdAsync(freeItemId.Value) is null)
             throw new InvalidOperationException("Free item not found.");
     }

Distribution/Features/ShopPO/ShopPOController.cs

@@ -30,6 +30,16 @@ public class ShopPOController(ShopPOService service, ICurrentUserService current
         return result is null ? NotFound() : Ok(result);
     }
 
+    [HttpGet("confirmed-without-invoice")]
+    public async Task<IActionResult> GetConfirmedWithoutInvoice(
+        [FromQuery] Guid? agentId,
+        [FromQuery] Guid? routeId,
+        [FromQuery] Guid? shopId)
+    {
+        var result = await service.GetConfirmedWithoutInvoiceAsync(agentId, routeId, shopId);
+        return Ok(result);
+    }
+
     [HttpPost]
     public async Task<IActionResult> Create(CreateShopPORequest request, CancellationToken ct)
     {

Distribution/Features/ShopPO/ShopPODTOs.cs

@@ -2,13 +2,18 @@
 
 namespace Distribution.Features.ShopPO;
 
-public record CreateShopPORequest(Guid StoreId, List<ShopPOItemRequest> Items, Guid? RaisedByUserId = null);
-public record ShopPOItemRequest(Guid ItemId, int Quantity, decimal? UnitPrice = null);
-public record UpdateShopPOItemsRequest(List<ShopPOItemRequest> Items);
+// DiscountSchemeIds: the FlatPercent/SlabDiscount scheme the user accepted (at most one). Null = leave as is.
+public record CreateShopPORequest(Guid StoreId, List<ShopPOItemRequest> Items, Guid? RaisedByUserId = null, List<Guid>? DiscountSchemeIds = null);
+// IsFree + SchemeId mark a free-issue line the user accepted from a scheme suggestion; its price is forced to 0.
+public record ShopPOItemRequest(Guid ItemId, int Quantity, decimal? UnitPrice = null, bool IsFree = false, Guid? SchemeId = null);
+public record UpdateShopPOItemsRequest(List<ShopPOItemRequest> Items, List<Guid>? DiscountSchemeIds = null);
 public record ConfirmShopPORequest(Guid? ConfirmedByUserId = null);
 public record CancelShopPORequest(string Reason, Guid? CancelledByUserId = null);
 
-public record ShopPOItemResponse(Guid Id, Guid ItemId, string ItemName, int Quantity, int QuantityFulfilled, decimal UnitPrice, bool IsActive);
+public record ShopPOItemResponse(Guid Id, Guid ItemId, string ItemName, int Quantity, int QuantityFulfilled, decimal UnitPrice, bool IsActive,
+    bool IsFree = false, Guid? SchemeId = null, string? SchemeName = null);
+
+public record ShopPODiscountResponse(Guid SchemeId, string SchemeName, decimal Amount);
 
 public record ShopPOResponse(
     Guid Id,
@@ -34,4 +39,5 @@ public record ShopPOResponse(
     DateTime? CancelledAt = null,
     string? CancelReason = null,
     string? CancelledByName = null,
-    string? CancelledByRole = null);
+    string? CancelledByRole = null,
+    List<ShopPODiscountResponse>? Discounts = null);

Distribution/Features/ShopPO/ShopPOService.cs

@@ -1,5 +1,7 @@
 using Distribution.Features.Invoice;
+using Distribution.Features.Notifications;
 using Distribution.Features.PriceList;
+using Distribution.Features.Scheme;
 using Distribution.Features.Stock;
 using Distribution.Infra.UoW;
 using Distribution.Models;
@@ -10,16 +12,47 @@ public class ShopPOService(
     IShopPORepository repo,
     IInvoiceRepository invoiceRepo,
     PriceListService priceListService,
+    SchemeService schemeService,
+    INotificationService notifications,
     IUnitOfWork uow)
 {
-    private static ShopPOResponse ToResponse(Models.ShopPO p, Dictionary<Guid, (string Name, string Role)>? users = null) =>
+    // Paid lines are priced from the request or the price list; accepted free-issue lines are always priced 0.
+    private async Task<ShopPOItem> BuildLineAsync(ShopPOItemRequest line, Guid storeId)
+    {
+        if (line.IsFree)
+            return new ShopPOItem
+            {
+                FK_ItemId = line.ItemId,
+                Quantity = line.Quantity,
+                UnitPrice = 0m,
+                IsFree = true,
+                FK_SchemeId = line.SchemeId
+            };
+
+        var unitPrice = line.UnitPrice
+            ?? (await priceListService.ResolveByStoreAsync(line.ItemId, storeId, DateTime.Now))?.Price
+            ?? throw new InvalidOperationException($"No resolvable price for item {line.ItemId}");
+
+        return new ShopPOItem { FK_ItemId = line.ItemId, Quantity = line.Quantity, UnitPrice = unitPrice };
+    }
+
+    // Tells the person who raised the order (and their supervisor) what happened to it, unless they did it themselves.
+    private Task NotifyOrderAsync(string type, Models.ShopPO po, Guid actingUserId, string? reason, CancellationToken ct) =>
+        notifications.NotifyAsync(
+            type,
+            [RecipientRule.Users(po.RaisedById), RecipientRule.ReportsTo(po.RaisedById)],
+            new NotificationArgs(new { StoreName = po.Store?.StoreName, Reason = reason }, "ShopPO", po.Id, "/sales/orders", actingUserId),
+            ct);
+
+    private static ShopPOResponse ToResponse(Models.ShopPO p, Dictionary<Guid, (string Name, string Role)>? users = null, List<ShopPODiscountResponse>? discounts = null) =>
         new(p.Id, p.FK_StoreId, p.Store?.StoreName ?? string.Empty,
             p.Store?.StoreAddress, p.Store?.ContactNumber,
             p.RaisedById, p.InvoiceId, p.TotalAmount, p.Status,
             p.ConfirmedAt, p.ConfirmedBy, p.FulfilledAt,
             p.Items.Where(i => i.IsActive).Select(i =>
                 new ShopPOItemResponse(i.Id, i.FK_ItemId, i.Item?.Name ?? string.Empty,
-                    i.Quantity, i.QuantityFulfilled, i.UnitPrice, i.IsActive)).ToList(),
+                    i.Quantity, i.QuantityFulfilled, i.UnitPrice, i.IsActive,
+                    i.IsFree, i.FK_SchemeId, i.SchemeName)).ToList(),
             p.IsActive, p.CreatedAt,
             users != null && users.TryGetValue(p.RaisedById, out var u) ? u.Name : null,
             users != null && users.TryGetValue(p.RaisedById, out var r) ? r.Role : null,
@@ -27,7 +60,8 @@ public class ShopPOService(
             users != null && p.ConfirmedBy is Guid cb2 && users.TryGetValue(cb2, out var c2) ? c2.Role : null,
             p.CancelledBy, p.CancelledAt, p.CancelReason,
             users != null && p.CancelledBy is Guid xb && users.TryGetValue(xb, out var x) ? x.Name : null,
-            users != null && p.CancelledBy is Guid xb2 && users.TryGetValue(xb2, out var x2) ? x2.Role : null);
+            users != null && p.CancelledBy is Guid xb2 && users.TryGetValue(xb2, out var x2) ? x2.Role : null,
+            discounts ?? []);
 
     private static IEnumerable<Guid> UserIds(Models.ShopPO p)
     {
@@ -52,7 +86,14 @@ public class ShopPOService(
         var po = await repo.GetByIdAsync(id);
         if (po is null) return null;
         var users = await repo.GetUserInfoAsync(UserIds(po));
-        return ToResponse(po, users);
+        return ToResponse(po, users, await schemeService.GetDiscountsForShopPOAsync(po.Id));
+    }
+
+    public async Task<List<ShopPOResponse>> GetConfirmedWithoutInvoiceAsync(Guid? agentId, Guid? routeId, Guid? shopId)
+    {
+        var items = await repo.GetConfirmedWithoutInvoiceAsync(agentId, routeId, shopId);
+        var users = await repo.GetUserInfoAsync(items.SelectMany(UserIds));
+        return items.Select(p => ToResponse(p, users)).ToList();
     }
 
     public async Task<ShopPOResponse> CreateAsync(CreateShopPORequest request, Guid raisedById, CancellationToken ct = default)
@@ -65,20 +106,14 @@ public class ShopPOService(
 
         foreach (var line in request.Items)
         {
-            var unitPrice = line.UnitPrice
-                ?? (await priceListService.ResolveByStoreAsync(line.ItemId, request.StoreId, DateTime.Now))?.Price
-                ?? throw new InvalidOperationException($"No resolvable price for item {line.ItemId}");
-
-            items.Add(new ShopPOItem
-            {
-                FK_ItemId = line.ItemId,
-                Quantity = line.Quantity,
-                QuantityFulfilled = 0,
-                UnitPrice = unitPrice
-            });
-            total += line.Quantity * unitPrice;
+            var item = await BuildLineAsync(line, request.StoreId);
+            items.Add(item);
+            total += item.Quantity * item.UnitPrice;
         }
 
+        await schemeService.ValidateFreeLinesAsync(request.StoreId, DateTime.Now, items);
+        await schemeService.ValidateDiscountSchemesAsync(request.StoreId, DateTime.Now, items, request.DiscountSchemeIds);
+
         var po = new Models.ShopPO
         {
             FK_StoreId = request.StoreId,
@@ -93,6 +128,7 @@ public class ShopPOService(
             await repo.AddAsync(po);
             foreach (var item in items) item.FK_ShopPOId = po.Id;
             await repo.AddItemsAsync(items);
+            await schemeService.SyncRedemptionsAsync(po.Id, items, request.DiscountSchemeIds);
             await uow.CommitAsync(ct);
         }
         catch { await uow.RollbackAsync(ct); throw; }
@@ -120,27 +156,22 @@ public class ShopPOService(
 
         foreach (var line in request.Items)
         {
-            var unitPrice = line.UnitPrice
-                ?? (await priceListService.ResolveByStoreAsync(line.ItemId, po.FK_StoreId, DateTime.Now))?.Price
-                ?? throw new InvalidOperationException($"No resolvable price for item {line.ItemId}");
-
-            newItems.Add(new ShopPOItem
-            {
-                FK_ShopPOId = id,
-                FK_ItemId = line.ItemId,
-                Quantity = line.Quantity,
-                QuantityFulfilled = 0,
-                UnitPrice = unitPrice
-            });
-            total += line.Quantity * unitPrice;
+            var item = await BuildLineAsync(line, po.FK_StoreId);
+            item.FK_ShopPOId = id;
+            newItems.Add(item);
+            total += item.Quantity * item.UnitPrice;
         }
 
+        await schemeService.ValidateFreeLinesAsync(po.FK_StoreId, po.CreatedAt, newItems);
+        await schemeService.ValidateDiscountSchemesAsync(po.FK_StoreId, po.CreatedAt, newItems, request.DiscountSchemeIds);
+
         po.TotalAmount = total;
 
         await uow.BeginAsync(ct);
         try
         {
             await repo.ReplaceItemsAsync(id, newItems);
+            await schemeService.SyncRedemptionsAsync(id, newItems, request.DiscountSchemeIds);
             repo.Update(po);
             await uow.CommitAsync(ct);
         }
@@ -168,6 +199,8 @@ public class ShopPOService(
         try { repo.Update(po); await uow.CommitAsync(ct); }
         catch { await uow.RollbackAsync(ct); throw; }
 
+        await NotifyOrderAsync(NotificationTypes.ShopPOConfirmed, po, confirmedBy, null, ct);
+
         return await ToResponseWithUserAsync(po);
     }
 
@@ -193,17 +226,25 @@ public class ShopPOService(
             CreatedBy = userId,
             TotalAmount = po.TotalAmount
         };
+        // Start the invoice at the discounted total so it matches what print/finalize will recompute.
+        invoice.DiscountAmount = Math.Min(await invoiceRepo.GetSchemeDiscountAsync(po.Id), po.TotalAmount);
+        invoice.TotalAmount = po.TotalAmount - invoice.DiscountAmount;
 
         await uow.BeginAsync(ct);
         try
         {
             await invoiceRepo.AddAsync(invoice);
+            var lines = InvoiceService.BuildItemsFromShopPO(po, invoice.Id);
+            await invoiceRepo.AddItemsAsync(lines);
+            await invoiceRepo.AddVersionAsync(InvoiceService.BuildVersion(invoice, lines, 1, InvoiceVersionStage.Created, userId));
             po.InvoiceId = invoice.Id;
             repo.Update(po);
             await uow.CommitAsync(ct);
         }
         catch { await uow.RollbackAsync(ct); throw; }
 
+        await NotifyOrderAsync(NotificationTypes.ShopPOConfirmed, po, userId, null, ct);
+
         var saved = await repo.GetByIdAsync(id);
         return await ToResponseWithUserAsync(saved!);
     }
@@ -231,6 +272,8 @@ public class ShopPOService(
         try { repo.Update(po); await uow.CommitAsync(ct); }
         catch { await uow.RollbackAsync(ct); throw; }
 
+        await NotifyOrderAsync(NotificationTypes.ShopPOCancelled, po, cancelledBy, po.CancelReason, ct);
+
         return await ToResponseWithUserAsync(po);
     }
 }

Distribution/Features/Store/StoreService.cs

@@ -1,3 +1,4 @@
+using Distribution.Features.Notifications;
 using Distribution.Features.Scheme;
 using Distribution.Features.Stock;
 using Distribution.Features.StoreCredit;
@@ -7,7 +8,7 @@ using Distribution.Models;
 
 namespace Distribution.Features.Store;
 
-public class StoreService(IStoreRepository repo, IUnitOfWork uow, ICurrentUserService currentUser, IScopeAccessService scopeAccess, SchemeService schemeService, Route.IRouteRepository routeRepo, IStoreCreditMovementRepository creditRepo)
+public class StoreService(IStoreRepository repo, IUnitOfWork uow, ICurrentUserService currentUser, IScopeAccessService scopeAccess, SchemeService schemeService, Route.IRouteRepository routeRepo, INotificationService notifications, IStoreCreditMovementRepository creditRepo)
 {
     private const int GlobalScopeRoleLevel = 50;
     private const int CreditApproverRoleLevel = 20;
@@ -148,6 +149,7 @@ public class StoreService(IStoreRepository repo, IUnitOfWork uow, ICurrentUserSe
         var store = await repo.GetByIdAsync(id);
         if (store is null || !store.IsActive) return null;
         if (!await HasStoreScopeAsync(id)) return null;
+        var wasWithinLimit = store.OutstandingBalance <= store.CreditLimit;
         store.OutstandingBalance = request.NewBalance;
         await uow.BeginAsync(ct);
         try
@@ -160,6 +162,18 @@ public class StoreService(IStoreRepository repo, IUnitOfWork uow, ICurrentUserSe
             await uow.RollbackAsync(ct);
             throw;
         }
+
+        // Only on the crossing, so repeated updates while over the limit don't re-alert.
+        if (store.CreditLimit > 0 && wasWithinLimit && store.OutstandingBalance > store.CreditLimit)
+            await notifications.NotifyAsync(
+                NotificationTypes.CreditLimitBreached,
+                [
+                    RecipientRule.RouteOwner(ScopeKind.Store, store.Id),
+                    RecipientRule.PermissionInScope("store.manage", ScopeKind.Store, store.Id),
+                ],
+                new NotificationArgs(new { store.StoreName }, "Store", store.Id, $"/stores/{store.Id}", currentUser.UserId),
+                ct);
+
         return ToResponse(store);
     }
 

Distribution/Features/SupplierClaims/SupplierClaimService.cs

@@ -1,4 +1,5 @@
 using Distribution.Features.Grn;
+using Distribution.Features.Notifications;
 using Distribution.Features.Po;
 using Distribution.Infra.UoW;
 using Distribution.Models;
@@ -9,6 +10,7 @@ public class SupplierClaimService(
     ISupplierClaimRepository repo,
     IPoRepository poRepo,
     IGrnRepository grnRepo,
+    INotificationService notifications,
     IUnitOfWork uow)
 {
     private static SupplierClaimItemResponse MapItem(SupplierClaimItem i) =>
@@ -149,9 +151,19 @@ public class SupplierClaimService(
         }
         catch { await uow.RollbackAsync(ct); throw; }
 
+        await NotifyDecisionAsync(NotificationTypes.SupplierClaimApproved, claim, approverId, ct);
+
         return Map(claim);
     }
 
+    // Tells whoever raised the claim how it was decided (never the person who decided it).
+    private Task NotifyDecisionAsync(string type, SupplierClaim claim, Guid decidedBy, CancellationToken ct) =>
+        notifications.NotifyAsync(
+            type,
+            [RecipientRule.Users(claim.RaisedByUserId)],
+            new NotificationArgs(null, "SupplierClaim", claim.Id, "/returns-claims/supplier-claims", decidedBy),
+            ct);
+
     public async Task<SupplierClaimResponse> RejectAsync(Guid id, RejectSupplierClaimRequest request, Guid approverId, CancellationToken ct = default)
     {
         var claim = await repo.GetByIdAsync(id)
@@ -172,6 +184,8 @@ public class SupplierClaimService(
         }
         catch { await uow.RollbackAsync(ct); throw; }
 
+        await NotifyDecisionAsync(NotificationTypes.SupplierClaimRejected, claim, approverId, ct);
+
         return Map(claim);
     }
 }

Distribution/Migrations/20261020075213_AddNotifications.cs

@@ -0,0 +1,99 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace Distribution.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddNotifications : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.CreateTable(
+                name: "Notifications",
+                columns: table => new
+                {
+                    Id = table.Column<Guid>(type: "char(36)", nullable: false, collation: "ascii_general_ci"),
+                    Type = table.Column<string>(type: "varchar(60)", maxLength: 60, nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4"),
+                    Severity = table.Column<int>(type: "int", nullable: false),
+                    Title = table.Column<string>(type: "varchar(150)", maxLength: 150, nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4"),
+                    Message = table.Column<string>(type: "varchar(500)", maxLength: 500, nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4"),
+                    EntityType = table.Column<string>(type: "varchar(50)", maxLength: 50, nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4"),
+                    EntityId = table.Column<Guid>(type: "char(36)", nullable: false, collation: "ascii_general_ci"),
+                    Link = table.Column<string>(type: "varchar(200)", maxLength: 200, nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4"),
+                    CreatedByUserId = table.Column<Guid>(type: "char(36)", nullable: true, collation: "ascii_general_ci"),
+                    CreatedAt = table.Column<DateTime>(type: "datetime(6)", nullable: false),
+                    IsActive = table.Column<bool>(type: "tinyint(1)", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Notifications", x => x.Id);
+                })
+                .Annotation("MySql:CharSet", "utf8mb4");
+
+            migrationBuilder.CreateTable(
+                name: "NotificationRecipients",
+                columns: table => new
+                {
+                    Id = table.Column<Guid>(type: "char(36)", nullable: false, collation: "ascii_general_ci"),
+                    FK_NotificationId = table.Column<Guid>(type: "char(36)", nullable: false, collation: "ascii_general_ci"),
+                    FK_UserId = table.Column<Guid>(type: "char(36)", nullable: false, collation: "ascii_general_ci"),
+                    IsRead = table.Column<bool>(type: "tinyint(1)", nullable: false),
+                    ReadAt = table.Column<DateTime>(type: "datetime(6)", nullable: true),
+                    CreatedAt = table.Column<DateTime>(type: "datetime(6)", nullable: false),
+                    IsActive = table.Column<bool>(type: "tinyint(1)", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_NotificationRecipients", x => x.Id);
+                    table.ForeignKey(
+                        name: "FK_NotificationRecipients_Notifications_FK_NotificationId",
+                        column: x => x.FK_NotificationId,
+                        principalTable: "Notifications",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                    table.ForeignKey(
+                        name: "FK_NotificationRecipients_Users_FK_UserId",
+                        column: x => x.FK_UserId,
+                        principalTable: "Users",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                })
+                .Annotation("MySql:CharSet", "utf8mb4");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_NotificationRecipients_FK_NotificationId_FK_UserId",
+                table: "NotificationRecipients",
+                columns: new[] { "FK_NotificationId", "FK_UserId" },
+                unique: true);
+
+            migrationBuilder.CreateIndex(
+                name: "IX_NotificationRecipients_FK_UserId_IsRead",
+                table: "NotificationRecipients",
+                columns: new[] { "FK_UserId", "IsRead" });
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Notifications_EntityType_EntityId",
+                table: "Notifications",
+                columns: new[] { "EntityType", "EntityId" });
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "NotificationRecipients");
+
+            migrationBuilder.DropTable(
+                name: "Notifications");
+
+        }
+    }
+}

Distribution/Migrations/20261020123138_AddInvoiceItems.cs

@@ -0,0 +1,81 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace Distribution.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddInvoiceItems : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.CreateTable(
+                name: "InvoiceItems",
+                columns: table => new
+                {
+                    Id = table.Column<Guid>(type: "char(36)", nullable: false, collation: "ascii_general_ci"),
+                    FK_InvoiceId = table.Column<Guid>(type: "char(36)", nullable: false, collation: "ascii_general_ci"),
+                    FK_ShopPOItemId = table.Column<Guid>(type: "char(36)", nullable: false, collation: "ascii_general_ci"),
+                    FK_ItemId = table.Column<Guid>(type: "char(36)", nullable: false, collation: "ascii_general_ci"),
+                    Quantity = table.Column<int>(type: "int", nullable: false),
+                    UnitPrice = table.Column<decimal>(type: "decimal(65,30)", nullable: false),
+                    CreatedAt = table.Column<DateTime>(type: "datetime(6)", nullable: false),
+                    IsActive = table.Column<bool>(type: "tinyint(1)", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_InvoiceItems", x => x.Id);
+                    table.ForeignKey(
+                        name: "FK_InvoiceItems_Invoices_FK_InvoiceId",
+                        column: x => x.FK_InvoiceId,
+                        principalTable: "Invoices",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Restrict);
+                    table.ForeignKey(
+                        name: "FK_InvoiceItems_Items_FK_ItemId",
+                        column: x => x.FK_ItemId,
+                        principalTable: "Items",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Restrict);
+                    table.ForeignKey(
+                        name: "FK_InvoiceItems_ShopPOItems_FK_ShopPOItemId",
+                        column: x => x.FK_ShopPOItemId,
+                        principalTable: "ShopPOItems",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Restrict);
+                })
+                .Annotation("MySql:CharSet", "utf8mb4");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_InvoiceItems_FK_InvoiceId",
+                table: "InvoiceItems",
+                column: "FK_InvoiceId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_InvoiceItems_FK_ItemId",
+                table: "InvoiceItems",
+                column: "FK_ItemId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_InvoiceItems_FK_ShopPOItemId",
+                table: "InvoiceItems",
+                column: "FK_ShopPOItemId");
+
+            // Backfill: snapshot each existing invoice's PO lines so older invoices can be edited/finalized.
+            migrationBuilder.Sql(@"
+                INSERT INTO InvoiceItems (Id, FK_InvoiceId, FK_ShopPOItemId, FK_ItemId, Quantity, UnitPrice, CreatedAt, IsActive)
+                SELECT UUID(), inv.Id, poi.Id, poi.FK_ItemId, poi.Quantity, poi.UnitPrice, NOW(6), 1
+                FROM Invoices inv
+                JOIN ShopPOItems poi ON poi.FK_ShopPOId = inv.FK_ShopPOId AND poi.IsActive = 1;");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "InvoiceItems");
+        }
+    }
+}

Distribution/Migrations/20261021052554_AddInvoiceVersionsAndLineEdits.cs

@@ -0,0 +1,157 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace Distribution.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddInvoiceVersionsAndLineEdits : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AlterColumn<Guid>(
+                name: "FK_ShopPOItemId",
+                table: "InvoiceItems",
+                type: "char(36)",
+                nullable: true,
+                collation: "ascii_general_ci",
+                oldClrType: typeof(Guid),
+                oldType: "char(36)")
+                .OldAnnotation("Relational:Collation", "ascii_general_ci");
+
+            migrationBuilder.AddColumn<bool>(
+                name: "IsRemoved",
+                table: "InvoiceItems",
+                type: "tinyint(1)",
+                nullable: false,
+                defaultValue: false);
+
+            migrationBuilder.CreateTable(
+                name: "InvoiceVersions",
+                columns: table => new
+                {
+                    Id = table.Column<Guid>(type: "char(36)", nullable: false, collation: "ascii_general_ci"),
+                    FK_InvoiceId = table.Column<Guid>(type: "char(36)", nullable: false, collation: "ascii_general_ci"),
+                    VersionNumber = table.Column<int>(type: "int", nullable: false),
+                    Stage = table.Column<int>(type: "int", nullable: false),
+                    TotalAmount = table.Column<decimal>(type: "decimal(65,30)", nullable: false),
+                    CreatedBy = table.Column<Guid>(type: "char(36)", nullable: false, collation: "ascii_general_ci"),
+                    CreatedAt = table.Column<DateTime>(type: "datetime(6)", nullable: false),
+                    IsActive = table.Column<bool>(type: "tinyint(1)", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_InvoiceVersions", x => x.Id);
+                    table.ForeignKey(
+                        name: "FK_InvoiceVersions_Invoices_FK_InvoiceId",
+                        column: x => x.FK_InvoiceId,
+                        principalTable: "Invoices",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Restrict);
+                })
+                .Annotation("MySql:CharSet", "utf8mb4");
+
+            migrationBuilder.CreateTable(
+                name: "InvoiceVersionItems",
+                columns: table => new
+                {
+                    Id = table.Column<Guid>(type: "char(36)", nullable: false, collation: "ascii_general_ci"),
+                    FK_InvoiceVersionId = table.Column<Guid>(type: "char(36)", nullable: false, collation: "ascii_general_ci"),
+                    FK_ShopPOItemId = table.Column<Guid>(type: "char(36)", nullable: true, collation: "ascii_general_ci"),
+                    FK_ItemId = table.Column<Guid>(type: "char(36)", nullable: false, collation: "ascii_general_ci"),
+                    Quantity = table.Column<int>(type: "int", nullable: false),
+                    UnitPrice = table.Column<decimal>(type: "decimal(65,30)", nullable: false),
+                    IsRemoved = table.Column<bool>(type: "tinyint(1)", nullable: false),
+                    CreatedAt = table.Column<DateTime>(type: "datetime(6)", nullable: false),
+                    IsActive = table.Column<bool>(type: "tinyint(1)", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_InvoiceVersionItems", x => x.Id);
+                    table.ForeignKey(
+                        name: "FK_InvoiceVersionItems_InvoiceVersions_FK_InvoiceVersionId",
+                        column: x => x.FK_InvoiceVersionId,
+                        principalTable: "InvoiceVersions",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Restrict);
+                    table.ForeignKey(
+                        name: "FK_InvoiceVersionItems_Items_FK_ItemId",
+                        column: x => x.FK_ItemId,
+                        principalTable: "Items",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Restrict);
+                    table.ForeignKey(
+                        name: "FK_InvoiceVersionItems_ShopPOItems_FK_ShopPOItemId",
+                        column: x => x.FK_ShopPOItemId,
+                        principalTable: "ShopPOItems",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Restrict);
+                })
+                .Annotation("MySql:CharSet", "utf8mb4");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_InvoiceVersionItems_FK_InvoiceVersionId",
+                table: "InvoiceVersionItems",
+                column: "FK_InvoiceVersionId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_InvoiceVersionItems_FK_ItemId",
+                table: "InvoiceVersionItems",
+                column: "FK_ItemId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_InvoiceVersionItems_FK_ShopPOItemId",
+                table: "InvoiceVersionItems",
+                column: "FK_ShopPOItemId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_InvoiceVersions_FK_InvoiceId_VersionNumber",
+                table: "InvoiceVersions",
+                columns: new[] { "FK_InvoiceId", "VersionNumber" },
+                unique: true);
+
+            // Backfill: one baseline version per existing invoice from its current lines.
+            migrationBuilder.Sql(@"
+                INSERT INTO InvoiceVersions (Id, FK_InvoiceId, VersionNumber, Stage, TotalAmount, CreatedBy, CreatedAt, IsActive)
+                SELECT UUID(), inv.Id, 1,
+                       CASE inv.Status WHEN 0 THEN 0 WHEN 1 THEN 2 ELSE 3 END,
+                       inv.TotalAmount, inv.CreatedBy, NOW(6), 1
+                FROM Invoices inv;");
+
+            migrationBuilder.Sql(@"
+                INSERT INTO InvoiceVersionItems (Id, FK_InvoiceVersionId, FK_ShopPOItemId, FK_ItemId, Quantity, UnitPrice, IsRemoved, CreatedAt, IsActive)
+                SELECT UUID(), v.Id, ii.FK_ShopPOItemId, ii.FK_ItemId, ii.Quantity, ii.UnitPrice, ii.IsRemoved, NOW(6), 1
+                FROM InvoiceVersions v
+                JOIN InvoiceItems ii ON ii.FK_InvoiceId = v.FK_InvoiceId AND ii.IsActive = 1
+                WHERE v.VersionNumber = 1;");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "InvoiceVersionItems");
+
+            migrationBuilder.DropTable(
+                name: "InvoiceVersions");
+
+            migrationBuilder.DropColumn(
+                name: "IsRemoved",
+                table: "InvoiceItems");
+
+            migrationBuilder.AlterColumn<Guid>(
+                name: "FK_ShopPOItemId",
+                table: "InvoiceItems",
+                type: "char(36)",
+                nullable: false,
+                defaultValue: new Guid("00000000-0000-0000-0000-000000000000"),
+                collation: "ascii_general_ci",
+                oldClrType: typeof(Guid),
+                oldType: "char(36)",
+                oldNullable: true)
+                .OldAnnotation("Relational:Collation", "ascii_general_ci");
+        }
+    }
+}

Distribution/Migrations/20261021101340_AddInvoiceDiscount.cs

@@ -0,0 +1,46 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace Distribution.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddInvoiceDiscount : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<decimal>(
+                name: "DiscountAmount",
+                table: "Invoices",
+                type: "decimal(65,30)",
+                nullable: false,
+                defaultValue: 0m);
+
+            migrationBuilder.UpdateData(
+                table: "Invoices",
+                keyColumn: "Id",
+                keyValue: new Guid("34500000-0000-0000-0000-000000000001"),
+                column: "DiscountAmount",
+                value: 0m);
+
+            migrationBuilder.UpdateData(
+                table: "Invoices",
+                keyColumn: "Id",
+                keyValue: new Guid("34500000-0000-0000-0000-000000000002"),
+                column: "DiscountAmount",
+                value: 0m);
+
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "DiscountAmount",
+                table: "Invoices");
+
+        }
+    }
+}

Distribution/Models/Enums.cs

@@ -18,6 +18,7 @@ namespace Distribution.Models
     public enum ShopPOStatus { Pending, PartiallyFulfilled, Fulfilled, Cancelled }
 
     public enum InvoiceStatus { Draft, Printed, Finalized }
+    public enum InvoiceVersionStage { Created, DraftEdited, Printed, Finalized }
 
     public enum PaymentStatus { Pending, PartiallyPaid, Paid }
 

Distribution/Models/Invoice.cs

@@ -19,8 +19,13 @@ namespace Distribution.Models
         public DateTime? FinalizedAt { get; set; }
         public Guid? FinalizedBy { get; set; }
 
+        /// <summary>Scheme discount redeemed against the PO, subtracted from the billable lines to give TotalAmount.</summary>
+        public decimal DiscountAmount { get; set; }
+
+        /// <summary>Payable amount: billable lines minus DiscountAmount.</summary>
         public decimal TotalAmount { get; set; }
 
+        public ICollection<InvoiceItem> Items { get; set; } = new List<InvoiceItem>();
         public ICollection<Payment> Payments { get; set; } = new List<Payment>();
     }
 }

Distribution/Models/InvoiceItem.cs

@@ -0,0 +1,23 @@
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace Distribution.Models
+{
+    public class InvoiceItem : Template
+    {
+        public Guid FK_InvoiceId { get; set; }
+        [ForeignKey("FK_InvoiceId")]
+        public Invoice Invoice { get; set; }
+
+        public Guid? FK_ShopPOItemId { get; set; }
+        [ForeignKey("FK_ShopPOItemId")]
+        public ShopPOItem? ShopPOItem { get; set; }
+
+        public Guid FK_ItemId { get; set; }
+        [ForeignKey("FK_ItemId")]
+        public Item Item { get; set; }
+
+        public int Quantity { get; set; }
+        public decimal UnitPrice { get; set; }
+        public bool IsRemoved { get; set; }
+    }
+}

Distribution/Models/InvoiceVersion.cs

@@ -0,0 +1,19 @@
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace Distribution.Models
+{
+    // Immutable snapshot of an invoice's lines at a point in its lifecycle.
+    public class InvoiceVersion : Template
+    {
+        public Guid FK_InvoiceId { get; set; }
+        [ForeignKey("FK_InvoiceId")]
+        public Invoice Invoice { get; set; }
+
+        public int VersionNumber { get; set; }
+        public InvoiceVersionStage Stage { get; set; }
+        public decimal TotalAmount { get; set; }
+        public Guid CreatedBy { get; set; }
+
+        public ICollection<InvoiceVersionItem> Items { get; set; } = new List<InvoiceVersionItem>();
+    }
+}

Distribution/Models/InvoiceVersionItem.cs

@@ -0,0 +1,23 @@
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace Distribution.Models
+{
+    public class InvoiceVersionItem : Template
+    {
+        public Guid FK_InvoiceVersionId { get; set; }
+        [ForeignKey("FK_InvoiceVersionId")]
+        public InvoiceVersion InvoiceVersion { get; set; }
+
+        public Guid? FK_ShopPOItemId { get; set; }
+        [ForeignKey("FK_ShopPOItemId")]
+        public ShopPOItem? ShopPOItem { get; set; }
+
+        public Guid FK_ItemId { get; set; }
+        [ForeignKey("FK_ItemId")]
+        public Item Item { get; set; }
+
+        public int Quantity { get; set; }
+        public decimal UnitPrice { get; set; }
+        public bool IsRemoved { get; set; }
+    }
+}

Distribution/Models/Notification.cs

@@ -0,0 +1,33 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace Distribution.Models
+{
+    public enum NotificationSeverity { Info, Success, Warning, Critical }
+
+    /// <summary>One row per event. Who it was delivered to lives in <see cref="NotificationRecipient"/>.</summary>
+    public class Notification : Template
+    {
+        [MaxLength(60)]
+        public string Type { get; set; } = string.Empty;
+
+        public NotificationSeverity Severity { get; set; }
+
+        [MaxLength(150)]
+        public string Title { get; set; } = string.Empty;
+
+        [MaxLength(500)]
+        public string Message { get; set; } = string.Empty;
+
+        [MaxLength(50)]
+        public string EntityType { get; set; } = string.Empty;
+
+        public Guid EntityId { get; set; }
+
+        [MaxLength(200)]
+        public string Link { get; set; } = string.Empty;
+
+        public Guid? CreatedByUserId { get; set; }
+
+        public ICollection<NotificationRecipient> Recipients { get; set; } = new List<NotificationRecipient>();
+    }
+}

Distribution/Models/NotificationRecipient.cs

@@ -0,0 +1,19 @@
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace Distribution.Models
+{
+    /// <summary>One row per user per notification, so read state is per user.</summary>
+    public class NotificationRecipient : Template
+    {
+        public Guid FK_NotificationId { get; set; }
+        [ForeignKey("FK_NotificationId")]
+        public Notification Notification { get; set; }
+
+        public Guid FK_UserId { get; set; }
+        [ForeignKey("FK_UserId")]
+        public User User { get; set; }
+
+        public bool IsRead { get; set; }
+        public DateTime? ReadAt { get; set; }
+    }
+}

Distribution/Models/ShopPOItem.cs

@@ -15,5 +15,11 @@ namespace Distribution.Models
         public int Quantity { get; set; }
         public int QuantityFulfilled { get; set; } = 0;
         public decimal UnitPrice { get; set; }
+
+        /// <summary>Free issue granted by a scheme (UnitPrice 0); shown in the Free Issue column.</summary>
+        public bool IsFree { get; set; }
+        public Guid? FK_SchemeId { get; set; }
+        /// <summary>Scheme name when it was applied, so later scheme edits don't rewrite history.</summary>
+        public string? SchemeName { get; set; }
     }
 }

Distribution/Program.cs

@@ -12,6 +12,7 @@ using Distribution.Features.ReceivedCheque;
 using Distribution.Features.DriverComplianceConfig;
 using Distribution.Features.DriverProfile;
 using Distribution.Features.Grn;
+using Distribution.Features.Notifications;
 using Distribution.Features.Item;
 using Distribution.Features.ShopPO;
 using Distribution.Features.Invoice;
@@ -142,6 +143,15 @@ builder.Services.AddScoped<ReceivedChequeService>();
 builder.Services.AddScoped<SupplierPaymentService>();
 builder.Services.AddScoped<SysConfigService>();
 
+builder.Services.AddScoped<INotificationRepository, NotificationRepository>();
+builder.Services.AddScoped<NotificationRecipientResolver>();
+builder.Services.AddScoped<NotificationService>();
+builder.Services.AddScoped<INotificationService>(sp => sp.GetRequiredService<NotificationService>());
+builder.Services.AddSingleton<Microsoft.AspNetCore.SignalR.IUserIdProvider, NotificationUserIdProvider>();
+builder.Services.AddHostedService<NotificationCleanupJob>();
+builder.Services.AddSignalR()
+    .AddJsonProtocol(options => options.PayloadSerializerOptions.Converters.Add(new JsonStringEnumConverter()));
+
 builder.Services.AddMemoryCache();
 builder.Services.AddHttpContextAccessor();
 builder.Services.AddScoped<ICurrentUserService, CurrentUserService>();
@@ -193,5 +203,6 @@ app.UseMiddleware<AuthMiddleware>();
 app.UseAuthentication();
 app.UseAuthorization();
 app.MapControllers();
+app.MapHub<NotificationHub>(NotificationHub.Path);
 
 app.Run();

Distribution/docs/21_notifications_alerts.md

@@ -1,67 +1,330 @@
 # 21 — Notifications & Alerts
 
-**Status**: Not Started
-**Depends On**: 02 — Stock Ledger, 12 — Store Management, 08 — Sales Agent Controls
+**Status**: v1 in-app built — backend, SignalR hub, frontend bell + view-all page, 10 unit tests. EF migration `AddNotifications` is generated but **not applied** to any database. Six of the seven Phase 1 triggers are wired into the services (see **Triggers**); `StockLow` is deferred. The temporary test endpoint and button were removed.
+**Depends On**: 02 — Stock Ledger, 12 — Store Management, 08 — Sales Agent Controls, 15 — Procurement, 18 — Returns & Claims, 19 — Finance & Accounting
 
 ---
 
 ## Goal
 
-Covers [mainPlan.md §15](./mainPlan.md#15-notifications--alerts) in full
-— a cross-cutting delivery mechanism (email/SMS/push) triggered by events other steps already
-produce.
+Real-time **in-app** notifications (bell + toast) triggered by events other modules already produce
+([mainPlan.md §15](./mainPlan.md#15-notifications--alerts)). Email / SMS / push are out of scope for v1.
+
+Real-time uses **SignalR**. A notification is **saved first, pushed second**, so offline users see
+what they missed on their next load.
 
 ---
 
-## Background / Context
+## Implemented now — who gets which notification
 
-No notification channel exists in this codebase today. This step is purely the delivery mechanism
-and trigger wiring; the underlying conditions it watches for are already defined elsewhere
-(reorder point in [02_stock_ledger.md](./02_stock_ledger.md), credit limit in
-[12_store_management.md](./12_store_management.md), route deviation logic in
-[09_fraud_controls.md](./09_fraud_controls.md)).
+Every notification is **in-app only** (bell + toast + `/notifications`), pushed live over SignalR.
+
+| # | When this happens | Where in the app | Notification the user sees | Who receives it | Who does **not** | Level | Click opens |
+|---|---|---|---|---|---|---|---|
+| 1 | Shop order **confirmed** | `ShopPOService.ConfirmAsync`, `ConfirmAndCreateInvoiceAsync` | **Shop order confirmed** — "Shop order for *Store* was confirmed." | The user who raised the order + that user's supervisor | The person who confirmed it | Info | `/sales/orders` |
+| 2 | Shop order **cancelled** | `ShopPOService.CancelAsync` | **Shop order cancelled** — "Shop order for *Store* was cancelled: *reason*" | The user who raised the order + that user's supervisor | The person who cancelled it | Warning | `/sales/orders` |
+| 3 | Supplier claim **approved** | `SupplierClaimService.ApproveAsync` | **Supplier claim approved** | The user who raised the claim | The approver | Success | `/returns-claims/supplier-claims` |
+| 4 | Supplier claim **rejected** | `SupplierClaimService.RejectAsync` | **Supplier claim rejected** | The user who raised the claim | The person who rejected it | Warning | `/returns-claims/supplier-claims` |
+| 5 | **Driver assigned** to a ride | `RideService.AssignDriverAsync` | **Ride assigned** — "You have been assigned to a ride." | The assigned driver | Everyone else | Info | `/operations/rides` |
+| 6 | Ride **cancelled** | `RideService.CancelAsync` | **Ride cancelled** — "A ride was cancelled (*type*). *reason*" | The owner of every route in the ride, plus users with `delivery-task.manage` whose scope covers those routes | The person who cancelled it | Critical | `/operations/rides` |
+| 7 | Delivery **failed** | `DeliveryTaskService.FailAsync` | **Delivery failed** — "Delivery to *Store* failed. *note*" | The owner of the store's route, plus users with `delivery-task.manage` whose scope covers the store | Nobody is excluded (this action does not record who did it) | Warning | `/operations/deliveries` |
+| 8 | Delivery **partly delivered** | `DeliveryTaskService.ConfirmAsync` | **Partial delivery** — "Delivery to *Store* was only partly delivered." | Same as #7 | The person who confirmed it | Warning | `/operations/deliveries` |
+| 9 | Store **credit limit crossed** | `StoreService.UpdateOutstandingBalanceAsync` | **Credit limit exceeded** — "*Store* has exceeded its credit limit." | The owner of the store's route, plus users with `store.manage` whose scope covers the store | The person who updated the balance. Fires only when the balance goes from within the limit to above it | Warning | `/stores/{id}` |
+
+**Not wired yet:** low stock (`StockLow`), cheque returned / bounced / due, expiring batches, overdue payments, and the Phase 2 list below.
+
+### Three rules that decide who sees what
+
+1. **You are never notified of your own action.**
+2. **Receiving needs no permission** — any logged-in user gets the bell and the page. Permissions only matter for *doing* the action, and for the "managers in scope" recipients (they need the permission **and** a scope covering the store or route).
+3. **SuperAdmin usually acts, rarely receives.** It holds every permission but has no scope rows in the seed, so it is only a recipient when it created the record (orders, claims) or owns the route.
+
+### With two logins — SuperAdmin and a sales rep
+
+| Who does it | Action | Who gets the notification |
+|---|---|---|
+| Rep creates, **SuperAdmin** confirms or cancels | Shop order | **Rep** (creator), plus the rep's supervisor if they have one |
+| **SuperAdmin** creates, rep confirms or cancels | Shop order | **SuperAdmin** (creator) |
+| SuperAdmin | Sets a store's outstanding balance above its limit | The **rep**, if the rep owns that store's route. SuperAdmin never (actor) |
+| SuperAdmin | Assigns a driver to a ride | The **rep**, only if the rep is that driver |
+| SuperAdmin | Approves or rejects a supplier claim | Whoever raised the claim — the **rep** only if the rep raised it |
+| Anyone | Fails a delivery / cancels a ride | The **rep**, if the rep owns a route involved. SuperAdmin only if it has a scope on that route |
+
+Seed route owners: `nimal.perera` owns the Colombo and Negombo routes; `kamal.silva` owns Kandy and Matale.
+
+### Quick test (two browsers, one login each, both on a dashboard page)
+
+1. As the **rep**, create a shop order (Sales → New).
+2. As **SuperAdmin**, confirm it, then create a second one and cancel it with a reason.
+3. The rep sees a toast, a red badge on the bell and a new row on `/notifications` — "Shop order confirmed" and "Shop order cancelled: *reason*". Clicking one marks it read and opens `/sales/orders`.
+4. Reverse it: SuperAdmin creates an order and the rep confirms or cancels it — SuperAdmin is notified.
+5. Credit limit: there is no screen for it, so use Swagger (`/swagger`): `PUT /api/stores/{id}/outstanding-balance` with `{ "newBalance": 60000 }` on a store whose limit is lower (Fort Mini Mart: limit 50,000). A second call with a higher value does not alert again; drop the balance back under the limit and set it over again to re-trigger.
 
 ---
 
-## Data Model Changes
+## Flow
 
-### Notification
-
-`RecipientUserId`, `Type`, `Payload` (JSON), `Channel` (`Email`, `SMS`, `Push`, `InApp`), `SentAt`,
-`ReadAt` (nullable).
+```
+Service action ──► uow.CommitAsync()                    (business transaction, unchanged)
+      │
+      ▼  only after a successful commit
+NotificationService.NotifyAsync(type, recipientRule, args, entity)
+      1. resolve recipients      (users | permission | scope | reports-to)
+      2. insert Notification + NotificationRecipient rows
+      3. hub.Clients.Users(ids).SendAsync("notification", dto)
+      ▼
+Frontend provider: connection.on("notification") → badge + toast → click opens Link + marks read
+```
 
 ---
 
-## API Endpoints
+## Decisions
 
-| Function reference | Endpoint intent |
+| Question | Decision |
 |---|---|
-| `sendLowStockAlert(warehouseId, sku)` | Internal — triggered when a stock movement crosses the reorder point set in [02_stock_ledger.md](./02_stock_ledger.md) |
-| `sendCreditLimitBreachAlert(storeId)` | Internal — triggered on order/invoice creation when `Store.OutstandingBalance` exceeds `Store.CreditLimit` |
-| `sendApprovalPendingNotification(approverId, requestId)` | Internal — triggered by `submitOrderForApproval` ([08_sales_agent_controls.md](./08_sales_agent_controls.md)) and return approval ([18_returns_claims.md](./18_returns_claims.md)) |
-| `sendRouteDeviationAlert(routeId, salesRepId)` | Internal — triggered from [09_fraud_controls.md](./09_fraud_controls.md)'s anomaly flag. The source data now exists (`RouteVisitLog.IsDeviationFlagged`, see [11_route_sales_management.md](./11_route_sales_management.md)), but no anomaly flag or notification reads it yet. |
-| — | `GET /api/notifications` — recipient's own notification inbox |
-| — | `PUT /api/notifications/{id}/read` |
+| First batch of triggers | The seven Phase 1 triggers below. Cheque triggers wait until finance permissions exist in the seed |
+| Channels | In-app only (SignalR). Email / SMS / push deferred |
+| Per-type config table + admin screen | **Not in v1.** Every type is always enabled; add `NotificationModuleConfig` when someone needs to mute a type |
+| Scheduled alerts (Phase 1b) | Second pass. Only the retention cleanup job ships in v1 |
+| CORS / instances | Existing `Cors:AllowedOrigins` + `AllowCredentials()` already suit SignalR. Single API instance, no Redis backplane |
+| Recipients | By **permission code** and scope, not role name. The seeded roles are `SalesRep`, `Supervisor`, `AreaManager`, `AreaSupervisor`, `RegionalManager`, `RegionalAgency`, `SuperAdmin`; there is no Accounts / operations role |
+| Ids | `User`, `Permission` and entity ids are **Guid** (see seeds) |
 
 ---
 
-## Business Rules
+## Data Model
 
-- Every `send*` function in §15 is a trigger, not a user-facing endpoint — the only client-facing
-  endpoints are inbox read/list.
-- Notification delivery failures (e.g. SMS provider down) must not roll back the business
-  transaction that triggered them — fire-and-forget, logged separately.
+**Notification** — one row per event
+
+| Field | Type | Notes |
+|---|---|---|
+| `Id` | Guid PK | |
+| `Type` | varchar(60) | `NotificationTypes` constant; frontend maps it to an icon |
+| `Severity` | enum | `Info`, `Success`, `Warning`, `Critical` |
+| `Title` / `Message` | varchar(150) / varchar(500) | Built from the type's templates |
+| `EntityType` / `EntityId` | varchar(50) / Guid | The related record |
+| `Link` | varchar(200) | Frontend route, e.g. `/payments/received-cheques/88` |
+| `CreatedByUserId` | FK User, null | Null for system / scheduled events |
+| `CreatedAt` | datetime | `DateTime.Now` |
+| `DedupeKey` | — | **Not in v1.** Added with the Phase 1b scheduled jobs, e.g. `ItemBatchExpiring:77:2026-10-20` |
+
+**NotificationRecipient** — one row per user per event (read state is per user)
+
+| Field | Type |
+|---|---|
+| `Id` | Guid PK |
+| `NotificationId` | FK |
+| `UserId` | FK |
+| `IsRead` / `ReadAt` | bool / datetime null |
+
+Index `(UserId, IsRead)`; the bell orders by the joined `Notification.CreatedAt DESC`.
+
+No config table in v1 — every type is enabled. (Later: `NotificationModuleConfig` with `Type` PK +
+`InAppEnabled`, missing row = enabled.)
+
+Example (failed delivery):
+```
+Notification:          Type=DeliveryTaskFailed, Severity=Warning,
+                       Title="Delivery failed", Message="Delivery to Fort Mini Mart failed.",
+                       EntityType=DeliveryTask, EntityId=<guid>, Link=/operations/delivery-tasks/<guid>
+NotificationRecipient: (that notification, Nimal Perera - route owner, unread)
+                       (that notification, a delivery-task.manage user in Western region, unread)
+```
+
+---
+
+## Recipients
+
+Every trigger names its rule. There is **no "notify everyone"** option.
+
+| Rule | Resolves to |
+|---|---|
+| `Users(ids)` | Those users (creator, driver, approver, claim owner) |
+| `Permission(code)` | Active users whose role has that permission code (`User.FK_RoleId` → `RolePermission` → `Permission.Code`), e.g. `delivery-task.manage` |
+| `Scope(kind, id)` | Users whose `UserStoreScope` / `UserRegionScope` / `UserRouteScope` covers the record |
+| `PermissionInScope(code, kind, id)` | Intersection of the two (e.g. `store.manage` users for that store's region) |
+| `ReportsTo(userId)` | The user's supervisor via `User.FK_ReportsToUserId` |
+| `RouteOwner(kind, id)` | The owner (`Route.FK_OwnerUserId`) of the route, or of the store's route when `kind` is `Store` |
+
+`SuperAdmin` holds every permission, so it receives `Permission` rules automatically; use
+`PermissionInScope` where that would be too noisy.
+
+The resolver always drops inactive users and the acting user, and de-duplicates.
+
+---
+
+## Triggers
+
+Each is called **after** the owning service's `uow.CommitAsync()`.
+
+**Phase 1 — must have**
+
+| Type | Raised by | When | Recipients | Severity |
+|---|---|---|---|---|
+| Type | Status | Raised by | When | Recipients | Severity |
+|---|---|---|---|---|---|
+| `SupplierClaimApproved` / `Rejected` | ✅ wired | `SupplierClaimService.ApproveAsync` / `RejectAsync` | Decision | `Users(RaisedByUserId)` (not the decider) | Success / Warning |
+| `RideCancelled` | ✅ wired | `RideService.CancelAsync` | Cancelled (message carries `CancelRequestType` + reason) | For each distinct route in the ride's delivery tasks: `RouteOwner(Route)` + `PermissionInScope(delivery-task.manage, Route)`. A ride has no route of its own, so routes come from its tasks' stores | Critical |
+| `RideDriverAssigned` | ✅ wired | `RideService.AssignDriverAsync` | Driver assigned | `Users(driver.FK_UserId)` | Info |
+| `DeliveryTaskFailed` | ✅ wired | `DeliveryTaskService.FailAsync` | Task failed | `RouteOwner(Store)` + `PermissionInScope(delivery-task.manage, Store)` | Warning |
+| `DeliveryTaskPartiallyDelivered` | ✅ wired | `DeliveryTaskService.ConfirmAsync` | Confirmed with `fullyDelivered == false` (a separate type: "failed" would be the wrong wording) | same as above | Warning |
+| `ShopPOConfirmed` / `Cancelled` | ✅ wired | `ShopPOService.ConfirmAsync`, `ConfirmAndCreateInvoiceAsync` / `CancelAsync` | Status change | `Users(RaisedById)` + `ReportsTo(RaisedById)` (not the actor) | Info / Warning |
+| `CreditLimitBreached` | ✅ wired | `StoreService.UpdateOutstandingBalanceAsync` | Balance crosses from ≤ to > `CreditLimit` (crossing only). This is the only place `OutstandingBalance` is ever written — invoices and payments do not update it | `RouteOwner(Store)` + `PermissionInScope(store.manage, Store)` | Warning |
+| `StockLow` | ⏸ deferred | Stock movement | Crosses to ≤ `Item.ReorderLevel` | Undecided — warehouses have no region / scope link, so `PermissionInScope` cannot target them. Needs a per-request tracker + action filter because stock moves from many call sites that commit separately | Warning |
+
+**Waiting on finance permissions** (not in the seed yet — add a cheque permission first)
+
+`ReceivedChequeReturned` (`ReceivedChequeService.UpdateStatusAsync`, action `Return`, Critical) ·
+`ChequePageBounced` (`ChequeBookService.UpdatePageStatusAsync`, action `Bounce`, Critical)
+
+**Phase 1b — scheduled, second pass** (daily `BackgroundService`, uses `DedupeKey`)
+
+`ReceivedChequeDueSoon` (≤ 2 days) · `ItemBatchExpiring` (≤ N days) · `PaymentOverdue` ·
+`DriverComplianceExpiring`
+
+**Phase 2 — later**
+
+`PoCancelled` / `PoClosed` · `GrnShortOrDamaged` · `LoadingSheetConfirmed` · `InvoiceFinalized` ·
+`ReturnCreated` / `ClaimSettled` · `PurchaseReturnCreated` · `ApprovalPending` ·
+`RouteDeviationFlagged` · `RoleAssigned` / `ScopeChanged` · `SyncFailed`
+
+Excluded on purpose: plain master-data CRUD (brand, category, UOM, vehicle, region).
+
+---
+
+## API
+
+| Endpoint | Purpose |
+|---|---|
+| `GET /api/notifications?unreadOnly=&page=&pageSize=` | Caller's inbox, newest first |
+| `GET /api/notifications/unread-count` | Badge count |
+| `PATCH /api/notifications/{id}/read` | Mark one read (own row only) |
+| `PATCH /api/notifications/read-all` | Mark all read |
+| `DELETE /api/notifications/{id}` | Remove caller's recipient row |
+| `WS /hubs/notifications` | SignalR; server → client event `notification` |
+
+---
+
+## Backend structure
+
+```
+Features/Notifications/     (namespace Distribution.Features.Notifications — "Notification" alone clashes with Models.Notification)
+  NotificationController.cs         thin, no UoW
+  NotificationService.cs            resolve → persist → push; owns uow.CommitAsync()
+  INotificationRepository.cs / NotificationRepository.cs
+  NotificationRecipientResolver.cs  Users / Permission / Scope / PermissionInScope / ReportsTo
+  NotificationTypes.cs              constants + definition (severity, title/message template)
+  NotificationDTOs.cs
+  NotificationHub.cs                SignalR hub
+  NotificationCleanupJob.cs         daily retention purge
+  NotificationScheduleJob.cs        Phase 1b alerts (second pass)
+Models/Notification.cs, NotificationRecipient.cs
+```
+
+### Code reference
+
+**Registry** — services never pass string literals:
+```csharp
+public static class NotificationTypes
+{
+    public const string DeliveryTaskFailed = "DeliveryTaskFailed";
+    // ...
+    public static readonly IReadOnlyDictionary<string, NotificationTypeDefinition> All = new Dictionary<string, NotificationTypeDefinition>
+    {
+        [DeliveryTaskFailed] = new(NotificationSeverity.Warning,
+            "Delivery failed", "Delivery to {StoreName} failed."),
+    };
+}
+```
+
+**Service contract** — never throws; failures are logged:
+```csharp
+public interface INotificationService
+{
+    // recipients = union of the rules, then resolved, filtered (inactive, actor) and de-duplicated
+    Task NotifyAsync(string type, IReadOnlyList<RecipientRule> recipients, NotificationArgs args, CancellationToken ct = default);
+}
+// RecipientRule: Users(ids) | Permission(code) | Scope(kind, id) | PermissionInScope(code, kind, id) | ReportsTo(userId) | RouteOwner(kind, id)
+// NotificationArgs: Values (template tokens), EntityType, EntityId (Guid), Link, CreatedByUserId (Guid?)
+```
+
+**Calling it from an existing service:**
+```csharp
+await _uow.CommitAsync(ct);
+await _notifications.NotifyAsync(NotificationTypes.DeliveryTaskFailed,
+    [RecipientRule.Users(route.FK_OwnerUserId),
+     RecipientRule.PermissionInScope("delivery-task.manage", ScopeKind.Region, route.FK_RegionId)],
+    new(new { StoreName = store.StoreName }, "DeliveryTask", task.Id,
+        $"/operations/delivery-tasks/{task.Id}", currentUserId), ct);
+```
+
+**Program.cs:**
+```csharp
+builder.Services.AddSignalR();
+builder.Services.AddScoped<INotificationService, NotificationService>();
+builder.Services.AddHostedService<NotificationCleanupJob>();
+// CORS: AllowCredentials() with explicit origins
+app.MapHub<NotificationHub>("/hubs/notifications");
+```
+The hub authenticates through the existing `access-token` cookie (read by `AuthMiddleware`); the
+client connects with `withCredentials: true`. A `?access_token=` query fallback is not needed unless
+the token ever moves out of the cookie. Users are addressed by their `UserId` claim
+(`NotificationUserIdProvider`). Each recipient gets its own push because the DTO `Id` is the
+recipient row id.
+
+**Frontend** (`contexts/notification-context.tsx`):
+```tsx
+const connection = new HubConnectionBuilder()
+  .withUrl(`${API}/hubs/notifications`, { withCredentials: true })
+  .withAutomaticReconnect().build();
+
+connection.on("notification", (n: NotificationDto) => {
+  setUnread((c) => c + 1);
+  setItems((p) => [n, ...p]);
+  toast(n.title, { description: n.message, action: { label: "Open", onClick: () => router.push(n.link) } });
+});
+connection.onreconnected(refetch);   // catch up on anything missed
+```
+Also: `lib/api/notifications.ts`, bell + popover in the dashboard header, `/notifications` "view all" page.
+
+---
+
+## Rules
+
+- Notify **after** a successful commit, inside try/catch + log. A notification failure must never
+  fail or roll back the business action.
+- Saving and the hub push are separate try/catch blocks (a failed push still leaves the inbox entry).
+- Unknown type: throws in dev/test, logged and skipped in production. A unit test checks that every
+  constant has a definition.
+- No per-type config in v1: every type is always delivered.
+- Click-through is mandatory: `EntityType`, `EntityId` and `Link` are required; clicking marks read.
+- Retention: `NotificationCleanupJob` deletes read recipients older than 90 days (SysConfig), then
+  events with no recipients left.
+- No Email/SMS switches in the UI until a sender exists.
+- `AGENTS.md`: `uow.CommitAsync()` only in services, never `SaveChangesAsync()`, `DateTime.Now` only.
 
 ---
 
 ## Open Questions
 
-- Which channels are actually needed at launch — in-app only, or SMS/email/push from day one? This
-  significantly changes the infrastructure needed (third-party provider integration, see
-  [22_integration_api.md](./22_integration_api.md)).
+Resolved — see **Decisions**. Remaining for later:
+
+1. Add a cheque / finance permission to the seed, then enable the two cheque triggers.
+2. Email / SMS / push: see [22_integration_api.md](./22_integration_api.md).
+3. If the API ever runs on more than one instance, add a SignalR Redis backplane.
+4. Per-type mute (`NotificationModuleConfig` + admin screen) when requested.
 
 ---
 
-## Implementation Notes
+## Build order
 
-> Fill this section in during planning discussion before writing any code.
+1. Entities (`Notification`, `NotificationRecipient`) + EF migration.
+2. `Features/Notifications/` (repository, resolver, service, controller, DTOs, `NotificationTypes`) + retention job.
+3. SignalR hub, `Program.cs` registration, user-id provider.
+4. Frontend: API client, provider, bell, toast, click-through, view-all page.
+
+5. Phase 1 triggers — six wired (recipient resolution is unit-tested; the per-service calls are not,
+   because `Distribution.Tests` does not currently compile). `StockLow` deferred.
+6. Later: `StockLow`, cheque triggers, Phase 1b scheduled alerts, Phase 2 triggers.
+
+Remaining before this works end to end: apply the `AddNotifications` migration.

Distribution/docs/refactor_docs/order_invoice_lifecycle.md

@@ -82,6 +82,89 @@ Invoice
 ├── IsActive, CreatedAt        — from Template
 ```
 
+### Invoice Line Items & Version History
+
+> **Implemented.** Class/column names follow the code: the PO is `ShopPO`/`ShopPOItem`, and the
+> invoice FK is `FK_ShopPOId` (not `FK_OrderId` as sketched above).
+
+The invoice no longer bills straight from the PO. It owns its own lines, and every change to them is
+snapshotted, so the original, printed and finalized quantities can all be compared.
+
+```
+InvoiceItem                          — the live billing lines
+├── FK_InvoiceId, FK_ShopPOItemId, FK_ItemId
+├── Quantity (int)                   — what is billed now (0..ShopPOItem.Quantity)
+├── UnitPrice (decimal)
+└── IsActive, CreatedAt              — from Template
+
+InvoiceVersion                       — immutable snapshot of the invoice
+├── FK_InvoiceId, VersionNumber      — unique per invoice, starts at 1
+├── Stage (InvoiceVersionStage)      — Created, DraftEdited, Printed, Finalized
+├── TotalAmount, CreatedBy
+└── Items → InvoiceVersionItem       — FK_ShopPOItemId, FK_ItemId, Quantity, UnitPrice
+```
+
+- **Add / remove lines (Draft):** `PUT /api/invoices/{id}/items` takes edits keyed by `invoiceItemId`
+  (change quantity/price, or `isRemoved: true` to strike the line — it is kept, excluded from the
+  total, shown struck through on the invoice view and print copy in every status, and can be
+  restored while Draft) or by `itemId` (add a catalog item
+  that was not on the PO; `unitPrice` required, quantity > 0, no duplicate of a live line). Added
+  lines have no `ShopPOItem` (`FK_ShopPOItemId` is nullable → no `orderedQuantity`, no max). Versions
+  store `IsRemoved` per line. At `Finalize`, adjustments are keyed by `invoiceItemId` and can also
+  set `isRemoved`. When the loading sheet is linked to invoices, it must count added lines.
+- **Original PO quantity** stays on `ShopPOItem.Quantity` (locked once the PO is confirmed) and is
+  returned as `orderedQuantity` on each invoice line.
+- `InvoiceItem` rows are copied from the PO's active lines at invoice creation (Mode A and Mode B).
+- A version is written, in the same transaction as the change, when the invoice is:
+
+| Stage | Written when |
+|---|---|
+| `Created` (v1) | Invoice created |
+| `DraftEdited` | `PUT /api/invoices/{id}/items` while `Draft` |
+| `Printed` | `POST /api/invoices/{id}/print` — the quantities on the paper copy |
+| `Finalized` | `POST /api/invoices/{id}/finalize` — after the agent's edits are applied |
+
+- Comparing `Printed` vs `Finalized` shows what the agent changed on paper.
+- Migrations `AddInvoiceItems` and `AddInvoiceVersions` backfill lines and one baseline version for
+  invoices that already existed (stage mapped from the invoice's status at migration time, so they
+  have no earlier history).
+
+### Invoice Screens & Printing (frontend)
+
+> **Implemented** in `distribution_fe`.
+
+**Invoice document** — one shared component (`components/invoice/invoice-template.tsx`) renders the
+invoice for the preview, the draft editor and the print tab:
+
+- **A4**: `INVOICE` header with Invoice No. (`INV-xxxxxxxx`), date and PO ref; a Status row shown
+  until the invoice is Finalized; *Bill To* (store name, plus address/phone from the PO); item table
+  (Item · Qty · Unit Price · Amount); totals (Subtotal, Total, and Paid / Balance Due when payments
+  exist); payments list; notes lines for the agent's edits on non-finalized copies; signature lines.
+  Soft slate rules, no heavy colour.
+- **80mm / 58mm receipts**: single black-and-white column with dashed rules (`*** DRAFT ***` /
+  `*** PRINTED ***`, `qty x price` lines, heavy-ruled TOTAL, Paid/Balance, payments, "Thank you!").
+- Money `Rs. 12,450.00`, quantities up to 3 decimals, dates `dd/MM/yyyy`.
+- Deleted lines are shown **struck through in every status** and excluded from all totals.
+- Not included (no data in the app): company/"From" block, logo, bank details, discount, tax, due date.
+
+**Print tab** — `/invoices/{id}/print` (own route group `(print)`, no dashboard chrome). Has a
+paper-size selector (A4 / 80mm / 58mm), sets `@page` with `margin: 0` (so the browser's own
+URL/date header and footer are not printed; the A4 sheet pads itself with 14mm), and opens the
+print dialog automatically. *Print* on a Draft asks who printed it, calls `POST /print`, then opens
+this tab (the tab is opened inside the click so popup blockers allow it). Printed/Finalized
+invoices have *Reprint*, which opens the tab without changing status.
+
+**Draft editor** — pencil icon (Draft only, also *Edit Items* on the invoice page) opens a full page, `/sales/invoices/{id}/edit` (not a modal), showing the invoice template in edit mode: quantity/price
+inputs, a trash icon per line (undo icon restores a deleted line), and an add-item row aligned to
+the table columns (item dropdown excluding items already on the invoice, quantity, price
+auto-filled from the store's price list, Enter or **+** to add). Save is disabled until something
+changes, a summary shows what is pending (the browser warns before leaving with unsaved edits), and an item picked but not yet added is included on save. Non-Draft invoices redirect back to the invoice page.
+Each save writes a `DraftEdited` version.
+
+**Configuration** — *Invoice Creation* card: two toggles, **Auto** (Mode A) and **Manual** (Mode B,
+default), mutually exclusive (turning one on turns the other off; the active one is locked on), each
+with a one-line explanation and a process line (`Confirm PO → … → Edit draft → Print → Finalize`).
+
 ### New Enum — `InvoiceStatus`
 
 ```csharp
@@ -140,6 +223,7 @@ Draft → Printed → Finalized
 |---|---|---|
 | (create) → Draft | **Mode A:** combined with PO confirm above | Invoice created at `Draft`. `Order.InvoiceId` set. |
 | (create) → Draft | **Mode B:** `POST /api/invoices` `{ orderId }` | Office user selects a Confirmed PO (filtered by `agentId` / `routeId` / `shopId`) and creates the Invoice at `Draft`. `Order.InvoiceId` set. |
+| Draft (edit) | `PUT /api/invoices/{id}/items` | Office user edits the draft's lines (quantity `0..ordered`, price `>= 0`). Status stays `Draft`; `TotalAmount` recomputed; a `DraftEdited` version is saved. |
 | Draft → Printed | `POST /api/invoices/{id}/print` | Invoice is physically printed. `PrintedAt`/`PrintedBy` set. Agent takes the printed copy to the field and makes handwritten edits during the ride. |
 | Printed → Finalized | `POST /api/invoices/{id}/finalize` | After ride/day-end, agent returns printed invoice. Office worker enters any edits the agent made (quantity adjustments, returns, damage, discounts) and submits. `TotalAmount` locked. `FinalizedAt`/`FinalizedBy` set. |
 
@@ -162,7 +246,10 @@ Draft → Printed → Finalized
    Invoice creation for both modes. It is stored as a plain column with no DB-level FK constraint.
 7. An Invoice cannot skip `Printed` — `Draft → Finalized` directly is not a valid transition.
 8. `Invoice.TotalAmount` is only authoritative once `Finalized`; through `Draft`/`Printed` it
-   reflects the current line items.
+   reflects the current invoice lines (`InvoiceItem`), not the PO lines.
+8a. Invoice lines are editable only while `Draft`. At `Finalize`, only quantities can be adjusted
+    (never above the ordered quantity). Every change writes an `InvoiceVersion` snapshot — see
+    [Invoice Line Items & Version History](#invoice-line-items--version-history).
 9. `Order.Status` (fulfillment tracking: Pending/PartiallyFulfilled/Fulfilled/Cancelled) is a
    separate axis from `Invoice.Status` — not merged in this pass.
 10. `Order.FK_SaleId` is optional — a PO can exist and be confirmed before any `Sale` is recorded.
@@ -201,8 +288,9 @@ Draft → Printed → Finalized
    already has a linked Invoice, what happens to that Invoice (voided? stays Draft?) is unresolved.
    If the PO's items were pulled into a loading sheet, what happens to those loading sheet items is
    also unresolved. Both cases need explicit cascade rules before implementation.
-6. **Exact adjustment payload for `POST /finalize`** — quantity adjustments, returns, damage, and
-   discounts are assumed but the payload shape is not fully specified. "Free issues" handling (items
+6. **Exact adjustment payload for `POST /finalize`** — *partly resolved:* quantity adjustments
+   (`{ shopPOItemId, adjustedQuantity }`) are implemented and persisted on the invoice lines.
+   Returns, damage and discounts are still open, as is the payload shape for them. "Free issues" handling (items
    given to the shop at no charge) is a known case that needs its own field(s) in the payload.
 
 ---

Distribution/docs/refactor_docs/shop_po_invoice_operations_flow.md

@@ -35,10 +35,28 @@ status transition and stock movement along the way.
 
 - Created via `ShopPOService.ConfirmAndCreateInvoiceAsync` — confirms the PO **and** creates an
   `Invoice` (`Status: Draft`, `PaymentStatus: Pending`) in one step, linking `ShopPO.InvoiceId`.
-  (No frontend UI currently calls this endpoint — only the plain `Confirm` action is wired up.)
+  The frontend calls it when **Configuration → Invoice Creation** is set to **Auto** (Mode A, the
+  confirm dialog and PO edit page read the mode); with **Manual** (Mode B, the default) it calls the
+  plain `Confirm` and the invoice is created later from `/sales/orders` → **Create Invoice**.
 - Lifecycle: `Draft → Printed → Finalized`.
-  - Finalizing can adjust the billed quantity per line (capped between `0` and the ordered
-    quantity) and recomputes `TotalAmount` from the adjusted lines.
+  - The invoice has its own lines (`InvoiceItem`), copied from the PO's active lines when it is
+    created (either mode). The PO's original quantity stays on `ShopPOItem` and is shown as
+    `orderedQuantity`.
+  - While `Draft`, lines can be edited (`PUT /invoices/{id}/items`): change quantity (`0..ordered`
+    on PO lines) and price (`>= 0`), **delete** a line (it is kept, struck through, excluded from
+    the total, and can be restored), or **add** a catalog item that was not on the PO (no ordered
+    quantity / max). `TotalAmount` is recomputed from the non-deleted lines.
+  - Finalizing applies the agent's edits from the printed copy to the lines (quantity capped
+    between `0` and the ordered quantity, or a line removed) and recomputes `TotalAmount`.
+  - Every change is snapshotted as an `InvoiceVersion` — see
+    [refactor_docs/order_invoice_lifecycle.md](refactor_docs/order_invoice_lifecycle.md#invoice-line-items--version-history).
+  - Frontend, `/sales/orders` row icons: **eye** = invoice preview, **pencil** (Draft) = open the edit page for the
+    draft invoice (`/sales/invoices/[id]/edit`: trash/undo icon per line, add-item row), **printer** (Draft) =
+    mark as printed and open the print tab; on Printed/Finalized the printer reprints without
+    changing status; plus finalize and record payment. `/sales/invoices/[id]` shows the items table
+    (ordered vs billed, Added/Removed badges), the version history, and the same actions.
+  - Invoice document and print tab: see
+    [refactor_docs/order_invoice_lifecycle.md](refactor_docs/order_invoice_lifecycle.md#invoice-screens--printing-frontend).
 - Payments (`payments` API) apply against the invoice, moving `PaymentStatus`:
   `Pending → PartiallyPaid → Paid`.
 

distribution_fe/app/(dashboard)/_components/analytics-sections.tsx

@@ -7,6 +7,8 @@ import { toast } from '@/components/ui/toast'
 import { dashboardReports, productReports, stockReports, getApiError, getPaginatedItems } from '@/lib/api/index'
 import type { DashboardInventorySummary, DashboardSalesSummary, ProductSalesRow, SalesKpis, StockOverview } from '@/lib/api/reports'
 import { DonutChart, MultiAreaChart, seriesColor } from './dashboard-charts'
+import { RegionSalesPie } from './region-sales-pie'
+import { SalesTrendInteractive } from './sales-trend-interactive'
 
 export interface DateRange {
   from: string // yyyy-MM-dd
@@ -60,8 +62,8 @@ function Kpi({ title, value, footer }: { title: string; value: string; footer?:
 function LoadingGrid() {
   return (
     <div className="flex flex-col gap-3" aria-busy="true">
-      <div className="grid grid-cols-2 gap-3 md:grid-cols-3 xl:grid-cols-6">
-        {Array.from({ length: 6 }).map((_, i) => <Skeleton key={i} className="h-[76px] rounded-xl" />)}
+      <div className="grid grid-cols-2 gap-3 md:grid-cols-4 xl:grid-cols-7">
+        {Array.from({ length: 7 }).map((_, i) => <Skeleton key={i} className="h-[76px] rounded-xl" />)}
       </div>
       <div className="grid grid-cols-1 gap-3 md:grid-cols-2 xl:grid-cols-3">
         {Array.from({ length: 6 }).map((_, i) => (
@@ -175,6 +177,7 @@ export function SalesSection({ range }: { range: DateRange }) {
   if (loading || productsLoading || !sales) return <LoadingGrid />
 
   const { current: c, previous: p } = sales.kpis
+  const { current: cash, previous: cashPrev } = sales.cash
   const kpi = (title: string, key: keyof SalesKpis, money = true) => (
     <Kpi
       title={title}
@@ -184,12 +187,11 @@ export function SalesSection({ range }: { range: DateRange }) {
   )
 
   const trend = sales.trend.map(t => ({ period: t.period, sales: t.sales, returns: t.returns }))
-  const regionTotal = sales.byRegion.reduce((t, r) => t + r.amount, 0)
   const repTotal = sales.byRep.reduce((t, r) => t + r.amount, 0)
 
   return (
     <div className="flex flex-col gap-3">
-      <div className="grid grid-cols-2 gap-3 md:grid-cols-3 xl:grid-cols-6">
+      <div className="grid grid-cols-2 gap-3 md:grid-cols-4 xl:grid-cols-7">
         {kpi('Net Sales', 'netSales')}
         {kpi('Gross Sales', 'grossSales')}
         {kpi('Total Orders', 'orders', false)}
@@ -204,16 +206,40 @@ export function SalesSection({ range }: { range: DateRange }) {
           }
         />
         {kpi('Sales Returns', 'returnValue')}
+        {kpi('Discounts', 'discounts')}
+      </div>
+      <div className="grid grid-cols-2 gap-3 md:grid-cols-4">
+        <Kpi
+          title="Collected"
+          value={fmtMoney(cash.collected)}
+          footer={<Delta current={cash.collected} previous={cashPrev.collected} />}
+        />
+        <Kpi
+          title="Outstanding"
+          value={fmtMoney(cash.outstanding)}
+          footer={<span className="text-muted-foreground">Unpaid on finalized invoices</span>}
+        />
+        <Kpi
+          title="Overdue"
+          value={fmtMoney(cash.overdue)}
+          footer={<span className="text-muted-foreground">Unpaid, invoiced over 30 days ago</span>}
+        />
+        <Kpi
+          title="Collection Rate"
+          value={cash.collectionRatePercent === null ? '—' : `${cash.collectionRatePercent}%`}
+          footer={<span className="text-muted-foreground">Collected ÷ billed (gross − discounts)</span>}
+        />
       </div>
       <p className="text-[11px] text-muted-foreground">
-        Sales = fulfilled lines on non-cancelled orders with a finalized invoice, dated by finalization. Net = gross − customer returns.
-        Gross profit uses item cost prices and covers only items that have one. Discounts and sales targets are not tracked per order yet.
+        Sales are recognised when an invoice is finalized (billable invoice lines on non-cancelled orders), regardless of payment status or method.
+        Net = gross − customer returns that deduct credit (item exchanges are net zero) − scheme discounts on those invoices
+        (not split by category, so Discounts is 0 when a category is selected). Collected = cash and cheque payments received;
+        credit-method payments stay outstanding. Outstanding and overdue are balances as of the end of the range, and Collected ignores the category filter.
+        Gross profit uses item cost prices and covers only items that have one. Sales targets are not tracked per order yet.
       </p>
 
       <div className="grid grid-cols-1 gap-3 md:grid-cols-2 xl:grid-cols-3">
-        <ChartCard title="Sales Trend" note={`Gross sales per ${sales.granularity}`} className="md:col-span-2">
-          <MultiAreaChart data={trend} series={[{ key: 'sales', label: 'Sales', color: seriesColor(0) }]} emptyText="No sales in this period." />
-        </ChartCard>
+        <SalesTrendInteractive className="md:col-span-2" />
         <ChartCard title="Sales by Category" note="Share of gross sales">
           <DonutChart data={topWithOther(named(sales.byCategory))} centerLabel="Rs." emptyText="No sales in this period." />
         </ChartCard>
@@ -232,9 +258,7 @@ export function SalesSection({ range }: { range: DateRange }) {
             ])}
           />
         </ChartCard>
-        <ChartCard title="Sales by Region">
-          <RankTable rows={sales.byRegion.map(r => ({ name: r.name, value: r.amount, extra: sharePct(r.amount, regionTotal) }))} fmt={fmtMoney} empty="No sales in this period." />
-        </ChartCard>
+        <RegionSalesPie rows={sales.byRegion} />
 
         <ChartCard title="Sales vs Returns" note={`Per ${sales.granularity}`} className="md:col-span-2">
           <MultiAreaChart

distribution_fe/app/(dashboard)/_components/dashboard-client.tsx

@@ -18,7 +18,7 @@ import {
   getPaginatedItems,
 } from '@/lib/api/index'
 import { useAuth } from '@/contexts/auth-context'
-import type { LowStockItemResponse, StockMovementResponse } from '@/types/api'
+import type { StockMovementResponse } from '@/types/api'
 import { InventorySection, SalesSection, type DateRange } from './analytics-sections'
 import { ColumnBarChart, DonutChart, HorizontalBarChart, RadialGauge, SalesTrendChart } from './dashboard-charts'
 import type { ChartDatum, MonthlySalesPoint } from './dashboard-charts'
@@ -54,7 +54,6 @@ const WIDGET_META: WidgetMeta[] = [
   { id: 'openRides',            cat: 'ops',     title: 'Open Rides',                 size: 'md', permission: 'rides.view' },
   { id: 'loadingSheetsByStatus',cat: 'ops',     title: 'Loading Sheets by Status',   size: 'md', permission: 'loading-sheet.view' },
   { id: 'deliveryTasks',        cat: 'ops',     title: 'Pending Delivery Tasks',     size: 'sm', permission: 'delivery-task.view' },
-  { id: 'lowStock',             cat: 'stock',   title: 'Low Stock Alerts',           size: 'lg', permission: 'stock.view' },
   { id: 'stockMovements',       cat: 'stock',   title: 'Recent Stock Movements',     size: 'lg', permission: 'stock.view' },
   { id: 'warehouseBalance',     cat: 'stock',   title: 'Warehouse Balances',         size: 'md', permission: 'stock.view' },
   { id: 'outstandingPay',       cat: 'finance', title: 'Outstanding Payments',       size: 'sm', permission: 'orders.view' },
@@ -63,7 +62,7 @@ const WIDGET_META: WidgetMeta[] = [
 
 const DEFAULT_ACTIVE = [
   'pendingPO', 'awaitingConfirm', 'fulfillRate', 'openRides', 'loadingSheetsByStatus',
-  'deliveryTasks', 'lowStock', 'outstandingPay', 'invoiceStatus',
+  'deliveryTasks', 'outstandingPay', 'invoiceStatus',
   'salesTrendChart', 'poStatusChart', 'paymentStatusChart', 'warehouseChart',
 ]
 
@@ -153,7 +152,6 @@ interface DashboardData {
   confirmedSheetsCount: number
   pendingTasksCount: number
   partialTasksCount: number
-  lowStock: LowStockItemResponse[]
   movements: StockMovementResponse[]
   warehouseBalances: WarehouseBalanceRow[]
   outstandingAmount: number
@@ -173,7 +171,7 @@ function emptyDashboardData(): DashboardData {
     openRides: [],
     plannedSheetsCount: 0, confirmedSheetsCount: 0,
     pendingTasksCount: 0, partialTasksCount: 0,
-    lowStock: [], movements: [], warehouseBalances: [],
+    movements: [], warehouseBalances: [],
     outstandingAmount: 0, outstandingInvoiceCount: 0,
     draftInvoiceCount: 0, printedInvoiceCount: 0, finalizedInvoiceCount: 0,
     poStatusChart: [], paymentStatusChart: [], movementTypeChart: [], monthlySales: [],
@@ -236,14 +234,6 @@ async function loadDashboardData(activeIds: Set<string>): Promise<DashboardData>
     )
   }
 
-  if (activeIds.has('lowStock')) {
-    fetches.push(
-      stock.lowStock()
-        .then(res => { data.lowStock = getPaginatedItems(res).slice(0, 5) })
-        .catch(() => {})
-    )
-  }
-
   if (activeIds.has('stockMovements')) {
     fetches.push(
       stock.movements({ pageSize: 5 })
@@ -400,24 +390,6 @@ function WidgetBody({ id, data }: { id: string; data: DashboardData }) {
           <div className="mt-1.5 text-xs text-muted-foreground">{data.partialTasksCount} partially delivered</div>
         </div>
       )
-    case 'lowStock':
-      return data.lowStock.length === 0 ? (
-        <p className="text-xs text-muted-foreground">No items below their reorder level.</p>
-      ) : (
-        <div>
-          <div className="grid grid-cols-[2fr_1.4fr_0.8fr_0.8fr] gap-2 border-b pb-2 text-[10px] font-semibold uppercase tracking-wide text-muted-foreground">
-            <span>Item</span><span>Warehouse</span><span>On hand</span><span>Reorder</span>
-          </div>
-          {data.lowStock.map(row => (
-            <div key={`${row.itemId}-${row.locationId}`} className="grid grid-cols-[2fr_1.4fr_0.8fr_0.8fr] gap-2 border-b border-muted py-2.5 text-sm last:border-0">
-              <span className="text-foreground">{row.itemName}</span>
-              <span className="text-muted-foreground">{row.locationName}</span>
-              <span className="font-semibold text-destructive">{row.quantity}</span>
-              <span className="text-muted-foreground">{row.reorderLevel}</span>
-            </div>
-          ))}
-        </div>
-      )
     case 'stockMovements':
       return data.movements.length === 0 ? (
         <p className="text-xs text-muted-foreground">No recent stock movements.</p>

distribution_fe/app/(dashboard)/_components/region-sales-pie.tsx

@@ -0,0 +1,123 @@
+'use client'
+
+import { useCallback, useMemo, useState } from 'react'
+import { Label, Pie, PieChart, Sector } from 'recharts'
+import type { PieSectorShapeProps } from 'recharts/types/polar/Pie'
+
+import { Card, CardAction, CardContent, CardDescription, CardHeader, CardTitle } from '@/components/ui/card'
+import { ChartContainer, ChartTooltip, ChartTooltipContent, type ChartConfig } from '@/components/ui/chart'
+import { Select, SelectContent, SelectGroup, SelectItem, SelectTrigger, SelectValue } from '@/components/ui/select'
+
+const SLICE_COLORS = ['var(--chart-1)', 'var(--chart-2)', 'var(--chart-3)', 'var(--chart-4)', 'var(--chart-5)']
+const MAX_SLICES = 5
+
+const fmtCompact = (v: number) => v.toLocaleString('en-LK', { notation: 'compact', maximumFractionDigits: 1 })
+const fmtMoney = (v: number) => `Rs. ${v.toLocaleString('en-LK', { maximumFractionDigits: 0 })}`
+
+/** Top (n-1) regions plus an "Other" slice, so the pie and the picker stay readable. */
+function topWithOther(rows: Array<{ name: string; amount: number }>) {
+  const sorted = [...rows].filter(r => r.amount > 0).sort((a, b) => b.amount - a.amount)
+  if (sorted.length <= MAX_SLICES) return sorted
+  const head = sorted.slice(0, MAX_SLICES - 1)
+  return [...head, { name: 'Other', amount: sorted.slice(MAX_SLICES - 1).reduce((t, r) => t + r.amount, 0) }]
+}
+
+/**
+ * Interactive pie of gross sales by region: pick a region (or it defaults to the largest) to pull its slice
+ * out and show its amount and share in the centre.
+ */
+export function RegionSalesPie({ rows, className }: { rows: Array<{ name: string; amount: number }>; className?: string }) {
+  const slices = useMemo(
+    () => topWithOther(rows).map((r, i) => ({ key: `r${i}`, name: r.name, amount: r.amount, fill: `var(--color-r${i})` })),
+    [rows],
+  )
+  const config = useMemo(
+    () => Object.fromEntries(slices.map((s, i) => [s.key, { label: s.name, color: SLICE_COLORS[i % SLICE_COLORS.length] }])) as ChartConfig,
+    [slices],
+  )
+  const total = slices.reduce((t, s) => t + s.amount, 0)
+
+  const [selected, setSelected] = useState<string | null>(null)
+  // Fall back to the largest region when nothing is picked or the picked region left the data (range changed).
+  const activeKey = slices.some(s => s.key === selected) ? selected : slices[0]?.key
+  const activeIndex = slices.findIndex(s => s.key === activeKey)
+  const active = slices[activeIndex]
+
+  const renderShape = useCallback(
+    ({ index, outerRadius = 0, ...props }: PieSectorShapeProps) =>
+      index === activeIndex ? (
+        <g>
+          <Sector {...props} outerRadius={outerRadius + 10} />
+          <Sector {...props} outerRadius={outerRadius + 25} innerRadius={outerRadius + 12} />
+        </g>
+      ) : (
+        <Sector {...props} outerRadius={outerRadius} />
+      ),
+    [activeIndex],
+  )
+
+  return (
+    <Card className={className}>
+      <CardHeader>
+        <CardTitle>Sales by Region</CardTitle>
+        <CardDescription>Share of gross sales</CardDescription>
+        {active && (
+          <CardAction>
+            <Select value={activeKey} onValueChange={v => v && setSelected(v)}>
+              <SelectTrigger size="sm" className="w-36" aria-label="Select a region">
+                <SelectValue placeholder="Select region" />
+              </SelectTrigger>
+              <SelectContent align="end">
+                <SelectGroup>
+                  {slices.map((s, i) => (
+                    <SelectItem key={s.key} value={s.key} label={s.name}>
+                      <span className="flex items-center gap-2 text-xs">
+                        <span className="size-3 shrink-0 rounded-xs" style={{ backgroundColor: SLICE_COLORS[i % SLICE_COLORS.length] }} />
+                        {s.name}
+                      </span>
+                    </SelectItem>
+                  ))}
+                </SelectGroup>
+              </SelectContent>
+            </Select>
+          </CardAction>
+        )}
+      </CardHeader>
+      <CardContent className="flex flex-1 justify-center">
+        {!active ? (
+          <p className="flex h-52 items-center justify-center text-xs text-muted-foreground">No sales in this period.</p>
+        ) : (
+          <ChartContainer config={config} className="mx-auto aspect-square w-full max-w-[260px]">
+            <PieChart>
+              <ChartTooltip
+                cursor={false}
+                content={<ChartTooltipContent hideLabel nameKey="key" formatter={(value, _name, item) => (
+                  <div className="flex w-full items-center justify-between gap-4">
+                    <span className="text-muted-foreground">{(item.payload as { name: string }).name}</span>
+                    <span className="font-mono font-medium text-foreground tabular-nums">{fmtMoney(Number(value))}</span>
+                  </div>
+                )} />}
+              />
+              <Pie data={slices} dataKey="amount" nameKey="key" innerRadius={60} strokeWidth={5} shape={renderShape}>
+                <Label
+                  content={({ viewBox }) => {
+                    if (!viewBox || !('cx' in viewBox) || !('cy' in viewBox)) return null
+                    const cy = viewBox.cy ?? 0
+                    return (
+                      <text x={viewBox.cx} y={cy} textAnchor="middle" dominantBaseline="middle">
+                        <tspan x={viewBox.cx} y={cy - 6} className="fill-foreground text-xl font-bold">{fmtCompact(active.amount)}</tspan>
+                        <tspan x={viewBox.cx} y={cy + 12} className="fill-muted-foreground text-[11px]">
+                          {total > 0 ? `${((active.amount / total) * 100).toFixed(1)}%` : ''}
+                        </tspan>
+                      </text>
+                    )
+                  }}
+                />
+              </Pie>
+            </PieChart>
+          </ChartContainer>
+        )}
+      </CardContent>
+    </Card>
+  )
+}

distribution_fe/app/(dashboard)/_components/sales-trend-interactive.tsx

@@ -0,0 +1,133 @@
+'use client'
+
+import { useEffect, useMemo, useState } from 'react'
+import { Area, AreaChart, CartesianGrid, XAxis, YAxis } from 'recharts'
+
+import { Card, CardAction, CardContent, CardDescription, CardHeader, CardTitle } from '@/components/ui/card'
+import {
+  ChartContainer,
+  ChartTooltip,
+  ChartTooltipContent,
+  type ChartConfig,
+} from '@/components/ui/chart'
+import { Select, SelectContent, SelectGroup, SelectItem, SelectTrigger, SelectValue } from '@/components/ui/select'
+import { Skeleton } from '@/components/ui/skeleton'
+import { toast } from '@/components/ui/toast'
+import { dashboardReports, getApiError } from '@/lib/api/index'
+import type { DashboardSalesSummary } from '@/lib/api/reports'
+
+const MAX_DAYS = 90
+
+const RANGES = [
+  { value: '90', label: 'Last 3 months' },
+  { value: '30', label: 'Last 30 days' },
+  { value: '7', label: 'Last 7 days' },
+]
+
+const chartConfig = {
+  sales: { label: 'Gross sales', color: 'var(--chart-2)' },
+} satisfies ChartConfig
+
+const pad = (n: number) => String(n).padStart(2, '0')
+const toIso = (d: Date) => `${d.getFullYear()}-${pad(d.getMonth() + 1)}-${pad(d.getDate())}`
+const addDays = (d: Date, n: number) => new Date(d.getFullYear(), d.getMonth(), d.getDate() + n)
+const parseIso = (v: string) => new Date(`${v}T00:00:00`)
+
+const fmtCompact = (v: number) => v.toLocaleString('en-LK', { notation: 'compact', maximumFractionDigits: 1 })
+const fmtMoney = (v: number) => `Rs. ${v.toLocaleString('en-LK', { maximumFractionDigits: 0 })}`
+const fmtTick = (v: string) => parseIso(v).toLocaleDateString('en-US', { month: 'short', day: 'numeric' })
+const fmtLabel = (v: string) => parseIso(v).toLocaleDateString('en-US', { month: 'short', day: 'numeric', year: 'numeric' })
+
+interface Loaded {
+  end: string // yyyy-MM-dd of the last day covered
+  trend: DashboardSalesSummary['trend']
+}
+
+/**
+ * Interactive area chart of daily gross sales. The last 90 days are loaded once and the
+ * time-range selector narrows them client-side. Days without activity are plotted as 0 so every day shows.
+ */
+export function SalesTrendInteractive({ className }: { className?: string }) {
+  const [range, setRange] = useState('90')
+  const [loaded, setLoaded] = useState<Loaded | null | undefined>(undefined)
+
+  useEffect(() => {
+    let cancelled = false
+    const today = new Date()
+    dashboardReports
+      .sales({ from: toIso(addDays(today, -(MAX_DAYS - 1))), to: toIso(today) })
+      .then(res => { if (!cancelled) setLoaded({ end: toIso(today), trend: res.trend }) })
+      .catch(err => {
+        if (cancelled) return
+        toast.add({ title: 'Failed to load sales trend', description: getApiError(err), type: 'error' })
+        setLoaded(null)
+      })
+    return () => { cancelled = true }
+  }, [])
+
+  const days = Number(range)
+  const data = useMemo(() => {
+    if (!loaded) return []
+    const byDay = new Map(loaded.trend.map(t => [t.period, t]))
+    const end = parseIso(loaded.end)
+    return Array.from({ length: days }, (_, i) => {
+      const date = toIso(addDays(end, i - (days - 1)))
+      const point = byDay.get(date)
+      return { date, sales: point?.sales ?? 0 }
+    })
+  }, [loaded, days])
+
+  const total = data.reduce((sum, d) => sum + d.sales, 0)
+  const rangeLabel = RANGES.find(r => r.value === range)?.label.toLowerCase() ?? ''
+
+  return (
+    <Card className={className}>
+      <CardHeader>
+        <CardTitle>Sales Trend</CardTitle>
+        <CardDescription>
+          {loaded ? `${fmtMoney(total)} gross sales in the ${rangeLabel}` : 'Gross sales per day'}
+        </CardDescription>
+        <CardAction>
+          <Select value={range} onValueChange={v => v && setRange(v)}>
+            <SelectTrigger size="sm" className="w-40" aria-label="Select time range">
+              <SelectValue placeholder="Last 3 months" />
+            </SelectTrigger>
+            <SelectContent>
+              <SelectGroup>
+                {RANGES.map(r => <SelectItem key={r.value} value={r.value}>{r.label}</SelectItem>)}
+              </SelectGroup>
+            </SelectContent>
+          </Select>
+        </CardAction>
+      </CardHeader>
+      <CardContent>
+        {loaded === undefined ? (
+          <Skeleton className="h-[250px] w-full rounded-xl" />
+        ) : loaded === null || data.every(d => d.sales === 0) ? (
+          <p className="flex h-[250px] items-center justify-center text-xs text-muted-foreground">
+            {loaded === null ? 'Sales trend is unavailable.' : `No sales in the ${rangeLabel}.`}
+          </p>
+        ) : (
+          <ChartContainer config={chartConfig} className="aspect-auto h-[250px] w-full">
+            <AreaChart data={data}>
+              <defs>
+                <linearGradient id="fillSales" x1="0" y1="0" x2="0" y2="1">
+                  <stop offset="5%" stopColor="var(--color-sales)" stopOpacity={0.8} />
+                  <stop offset="95%" stopColor="var(--color-sales)" stopOpacity={0.1} />
+                </linearGradient>
+              </defs>
+              <CartesianGrid vertical={false} />
+              <XAxis dataKey="date" tickLine={false} axisLine={false} tickMargin={8} minTickGap={32} tickFormatter={fmtTick} />
+              <YAxis tickFormatter={fmtCompact} tickLine={false} axisLine={false} width={44} />
+              <ChartTooltip
+                cursor={false}
+                content={<ChartTooltipContent indicator="dot" labelFormatter={v => fmtLabel(String(v))} />}
+              />
+              <Area dataKey="sales" type="natural" fill="url(#fillSales)" stroke="var(--color-sales)" />
+            </AreaChart>
+          </ChartContainer>
+        )}
+      </CardContent>
+    </Card>
+  )
+}

distribution_fe/app/(dashboard)/configuration/_components/invoice-creation-mode-card.tsx

@@ -0,0 +1,95 @@
+'use client'
+
+import { useEffect, useState } from 'react'
+import { HugeiconsIcon } from '@hugeicons/react'
+import { ReceiptDollarIcon } from '@hugeicons/core-free-icons'
+import { Card, CardContent, CardHeader, CardTitle, CardDescription } from '@/components/ui/card'
+import { Switch } from '@/components/ui/switch'
+import { toast } from '@/components/ui/toast'
+import {
+  invoiceCreationMode as invoiceCreationModeApi,
+  DEFAULT_INVOICE_CREATION_MODE,
+  getApiError,
+} from '@/lib/api/index'
+import type { InvoiceCreationMode } from '@/lib/api/sys-config'
+
+// What each toggle stands for. Both end the same way: edit the draft, print, finalize.
+const POSITIONS: { mode: InvoiceCreationMode; label: string; meaning: string; steps: string[] }[] = [
+  { mode: 'ModeA', label: 'Auto', meaning: 'Confirming a PO also creates its draft invoice.', steps: ['Confirm PO', 'Draft created'] },
+  { mode: 'ModeB', label: 'Manual', meaning: 'Confirm first, then create the invoice yourself.', steps: ['Confirm PO', 'Create invoice'] },
+]
+
+export function InvoiceCreationModeCard() {
+  const [loading, setLoading] = useState(true)
+  const [mode, setMode] = useState<InvoiceCreationMode>(DEFAULT_INVOICE_CREATION_MODE)
+  const [pending, setPending] = useState(false)
+
+  useEffect(() => {
+    invoiceCreationModeApi.get()
+      .then(setMode)
+      .catch(err => toast.add({ title: 'Failed to load invoice creation mode', description: getApiError(err), type: 'error' }))
+      .finally(() => setLoading(false))
+  }, [])
+
+  async function save(next: InvoiceCreationMode) {
+    if (next === mode) return
+    const previous = mode
+    setMode(next)
+    setPending(true)
+    try {
+      await invoiceCreationModeApi.set(next)
+    } catch (err) {
+      setMode(previous)
+      toast.add({ title: 'Failed to update invoice creation mode', description: getApiError(err), type: 'error' })
+    } finally {
+      setPending(false)
+    }
+  }
+
+  if (loading) return <p className="text-sm text-muted-foreground">Loading...</p>
+
+  return (
+    <Card className="h-full gap-3 rounded-3xl border-border/60 py-4">
+      <CardHeader className="border-b border-border/60 pb-3">
+        <div className="flex items-center gap-2.5">
+          <div className="flex h-8 w-8 shrink-0 items-center justify-center rounded-full bg-muted text-muted-foreground">
+            <HugeiconsIcon icon={ReceiptDollarIcon} size={16} />
+          </div>
+          <div>
+            <CardTitle className="text-base">Invoice Creation</CardTitle>
+            <CardDescription className="text-xs">When invoices are created for a Shop PO</CardDescription>
+          </div>
+        </div>
+      </CardHeader>
+      <CardContent className="flex flex-col gap-3">
+        {POSITIONS.map((p) => {
+          const active = p.mode === mode
+          return (
+            <div
+              key={p.mode}
+              className={`flex items-center justify-between gap-3 rounded-xl border px-3 py-2.5 ${
+                active ? 'border-primary/40 bg-muted' : 'border-border/60'
+              }`}
+            >
+              <label htmlFor={`invoice-creation-${p.mode}`} className="flex flex-col gap-0.5">
+                <span className="text-sm font-medium">{p.label}</span>
+                <span className="text-xs leading-relaxed text-muted-foreground">{p.meaning}</span>
+              </label>
+              {/* One mode is always on: turning one on turns the other off; the active one cannot be switched off. */}
+              <Switch
+                id={`invoice-creation-${p.mode}`}
+                checked={active}
+                disabled={pending || active}
+                onCheckedChange={(v) => v && save(p.mode)}
+              />
+            </div>
+          )
+        })}
+
+        <p className="text-xs text-muted-foreground">
+          {[...(POSITIONS.find((p) => p.mode === mode)?.steps ?? []), 'Edit draft', 'Print', 'Finalize'].join(' → ')}
+        </p>
+      </CardContent>
+    </Card>
+  )
+}

distribution_fe/app/(dashboard)/configuration/page.tsx

@@ -2,6 +2,7 @@
 
 import { ProductCapabilitiesCard } from './_components/product-capabilities-card'
 import { GrnTaxCard } from './_components/grn-tax-card'
+import { InvoiceCreationModeCard } from './_components/invoice-creation-mode-card'
 
 export default function ConfigurationPage() {
   return (
@@ -11,7 +12,6 @@ export default function ConfigurationPage() {
         <p className="text-sm text-muted-foreground mt-0.5">System-wide settings, grouped by area</p>
       </div>
 
-      {/* 12-column grid: each card takes 6 columns so the two sit side by side; they stack on narrow screens. */}
       <div className="grid grid-cols-12 items-stretch gap-6">
         <div className="col-span-12 flex lg:col-span-6 [&>*]:w-full">
           <ProductCapabilitiesCard />
@@ -19,6 +19,9 @@ export default function ConfigurationPage() {
         <div className="col-span-12 flex lg:col-span-6 [&>*]:w-full">
           <GrnTaxCard />
         </div>
+        <div className="col-span-12 flex lg:col-span-6 [&>*]:w-full">
+          <InvoiceCreationModeCard />
+        </div>
       </div>
     </div>
   )

distribution_fe/app/(dashboard)/layout.tsx

@@ -2,6 +2,8 @@ import { SidebarInset, SidebarProvider, SidebarTrigger } from '@/components/ui/s
 import { AppSidebar } from '@/components/layout/app-sidebar'
 import { BottomNav } from '@/components/layout/bottom-nav'
 import { ThemeToggle } from '@/components/layout/theme-toggle'
+import { NotificationBell } from '@/components/layout/notification-bell'
+import { NotificationProvider } from '@/contexts/notification-context'
 import { TopLoader } from '@/components/shared/top-loader'
 
 export default function DashboardLayout({
@@ -10,21 +12,24 @@ export default function DashboardLayout({
   children: React.ReactNode
 }) {
   return (
-    <SidebarProvider>
-      <TopLoader />
-      <AppSidebar />
-      <SidebarInset>
-        <header className="flex h-14 shrink-0 items-center gap-2 border-b border-border px-4">
-          <SidebarTrigger className="-ml-1 hidden md:flex" />
-          <div className="ml-auto">
-            <ThemeToggle />
-          </div>
-        </header>
-        <main className="flex flex-1 flex-col gap-4 p-4 pb-20 md:pb-4">
-          {children}
-        </main>
-      </SidebarInset>
-      <BottomNav />
-    </SidebarProvider>
+    <NotificationProvider>
+      <SidebarProvider>
+        <TopLoader />
+        <AppSidebar />
+        <SidebarInset>
+          <header className="flex h-14 shrink-0 items-center gap-2 border-b border-border px-4">
+            <SidebarTrigger className="-ml-1 hidden md:flex" />
+            <div className="ml-auto flex items-center gap-1">
+              <NotificationBell />
+              <ThemeToggle />
+            </div>
+          </header>
+          <main className="flex flex-1 flex-col gap-4 p-4 pb-20 md:pb-4">
+            {children}
+          </main>
+        </SidebarInset>
+        <BottomNav />
+      </SidebarProvider>
+    </NotificationProvider>
   )
 }

distribution_fe/app/(dashboard)/notifications/_components/notifications-client.tsx

@@ -0,0 +1,133 @@
+'use client'
+
+import { useCallback, useEffect, useState } from 'react'
+import { Trash2 } from 'lucide-react'
+import { Button } from '@/components/ui/button'
+import { EmptyState } from '@/components/shared/empty-state'
+import { NotificationRow } from '@/components/layout/notification-bell'
+import { useNotifications } from '@/contexts/notification-context'
+import { getApiError } from '@/lib/api'
+import { notifications } from '@/lib/api/notifications'
+import { toast } from '@/components/ui/toast'
+import type { NotificationResponse } from '@/types/notifications'
+
+const PAGE_SIZE = 20
+
+type Filter = 'all' | 'unread'
+
+export function NotificationsClient() {
+  const { recent, unreadCount, open, markAllRead, refresh } = useNotifications()
+
+  const [filter, setFilter] = useState<Filter>('all')
+  const [items, setItems] = useState<NotificationResponse[]>([])
+  const [page, setPage] = useState(1)
+  const [total, setTotal] = useState(0)
+  const [loading, setLoading] = useState(true)
+
+  // The caller decides whether to show the loading state (it is true on first render).
+  const load = useCallback(async (targetPage: number, reset: boolean) => {
+    try {
+      const result = await notifications.list({
+        unreadOnly: filter === 'unread',
+        page: targetPage,
+        pageSize: PAGE_SIZE,
+      })
+      setItems(prev => (reset ? result.items : [...prev, ...result.items]))
+      setPage(targetPage)
+      setTotal(result.total)
+    } catch (error) {
+      toast.add({ title: 'Could not load notifications', description: getApiError(error), type: 'error' })
+    } finally {
+      setLoading(false)
+    }
+  }, [filter])
+
+  // Reload when the filter changes or a new notification is pushed in.
+  const latestId = recent[0]?.id
+  useEffect(() => { void load(1, true) }, [load, latestId])
+
+  async function handleOpen(n: NotificationResponse) {
+    setItems(prev => prev.map(x => (x.id === n.id ? { ...x, isRead: true } : x)))
+    await open(n)
+  }
+
+  async function handleMarkAllRead() {
+    await markAllRead()
+    await load(1, true)
+  }
+
+  async function handleDelete(n: NotificationResponse) {
+    try {
+      await notifications.remove(n.id)
+      setItems(prev => prev.filter(x => x.id !== n.id))
+      setTotal(t => Math.max(0, t - 1))
+      void refresh()
+    } catch (error) {
+      toast.add({ title: 'Could not delete notification', description: getApiError(error), type: 'error' })
+    }
+  }
+
+  const hasMore = items.length < total
+
+  return (
+    <div className="mx-auto flex w-full max-w-3xl flex-col gap-4">
+      <div className="flex flex-wrap items-center justify-between gap-2">
+        <div>
+          <h1 className="text-lg font-semibold">Notifications</h1>
+          <p className="text-sm text-muted-foreground">
+            {unreadCount > 0 ? `${unreadCount} unread` : 'You\'re all caught up'}
+          </p>
+        </div>
+        <div className="flex items-center gap-2">
+          <div className="flex rounded-2xl border border-border p-0.5">
+            {(['all', 'unread'] as const).map(f => (
+              <Button
+                key={f}
+                variant={filter === f ? 'secondary' : 'ghost'}
+                size="sm"
+                onClick={() => { setLoading(true); setFilter(f) }}
+              >
+                {f === 'all' ? 'All' : 'Unread'}
+              </Button>
+            ))}
+          </div>
+          <Button variant="outline" size="sm" disabled={unreadCount === 0} onClick={() => { void handleMarkAllRead() }}>
+            Mark all read
+          </Button>
+        </div>
+      </div>
+
+      <div className="overflow-hidden rounded-2xl border border-border">
+        {items.length === 0 && !loading ? (
+          <EmptyState
+            title={filter === 'unread' ? 'No unread notifications' : 'No notifications yet'}
+            description="Alerts about deliveries, stock, claims and orders will show up here."
+          />
+        ) : (
+          <div className="divide-y divide-border">
+            {items.map(n => (
+              <div key={n.id} className="group relative">
+                <NotificationRow notification={n} onOpen={item => { void handleOpen(item) }} />
+                <Button
+                  variant="ghost"
+                  size="icon-sm"
+                  aria-label="Delete notification"
+                  className="absolute top-2 right-2 text-muted-foreground opacity-0 transition-opacity group-hover:opacity-100 focus-visible:opacity-100"
+                  onClick={() => { void handleDelete(n) }}
+                >
+                  <Trash2 size={14} />
+                </Button>
+              </div>
+            ))}
+          </div>
+        )}
+      </div>
+
+      {hasMore && (
+        <Button variant="outline" disabled={loading} onClick={() => { setLoading(true); void load(page + 1, false) }} className="self-center">
+          {loading ? 'Loading…' : 'Load more'}
+        </Button>
+      )}
+    </div>
+  )
+}

distribution_fe/app/(dashboard)/notifications/page.tsx

@@ -0,0 +1,5 @@
+import { NotificationsClient } from './_components/notifications-client'
+
+export default function NotificationsPage() {
+  return <NotificationsClient />
+}

distribution_fe/app/(dashboard)/sales/[id]/edit/page.tsx

@@ -24,9 +24,12 @@ import {
   items as itemsApi,
   priceLists as priceListsApi,
   users as usersApi,
+  invoiceCreationMode as invoiceCreationModeApi,
+  DEFAULT_INVOICE_CREATION_MODE,
   getApiError,
   getPaginatedItems,
 } from '@/lib/api/index'
+import type { InvoiceCreationMode } from '@/lib/api/sys-config'
 import type { ItemSummaryResponse, ShopPOResponse, UserResponse } from '@/types/api'
 
 const lineItemSchema = z.object({
@@ -56,6 +59,11 @@ export default function EditShopPOPage() {
   const [usersList, setUsersList] = useState<UserResponse[]>([])
   const [confirmedByUserId, setConfirmedByUserId] = useState('')
   const [confirming, setConfirming] = useState(false)
+  const [mode, setMode] = useState<InvoiceCreationMode>(DEFAULT_INVOICE_CREATION_MODE)
+
+  useEffect(() => {
+    invoiceCreationModeApi.get().then(setMode).catch(() => {})
+  }, [])
 
   const form = useForm<FormValues>({
     resolver: zodResolver(schema),
@@ -98,9 +106,14 @@ export default function EditShopPOPage() {
     if (!po || !confirmedByUserId) return
     setConfirming(true)
     try {
-      const updated = await shopPosApi.confirm(po.id, confirmedByUserId)
+      const updated = mode === 'ModeA'
+        ? await shopPosApi.confirmAndCreateInvoice(po.id, confirmedByUserId)
+        : await shopPosApi.confirm(po.id, confirmedByUserId)
       setPo(updated)
-      toast.add({ title: 'Shop PO confirmed', type: 'success' })
+      toast.add({
+        title: mode === 'ModeA' ? 'Shop PO confirmed and invoice created' : 'Shop PO confirmed',
+        type: 'success',
+      })
     } catch (err) {
       toast.add({ title: 'Failed to confirm Shop PO', description: getApiError(err), type: 'error' })
     } finally {

distribution_fe/app/(dashboard)/sales/_components/confirm-shop-po-dialog.tsx

@@ -21,7 +21,15 @@ import {
 } from '@/components/ui/dialog'
 import { FieldGroup } from '@/components/ui/field'
 import { toast } from '@/components/ui/toast'
-import { shopPos as shopPosApi, users as usersApi, getApiError, getPaginatedItems } from '@/lib/api/index'
+import {
+  shopPos as shopPosApi,
+  users as usersApi,
+  invoiceCreationMode as invoiceCreationModeApi,
+  DEFAULT_INVOICE_CREATION_MODE,
+  getApiError,
+  getPaginatedItems,
+} from '@/lib/api/index'
+import type { InvoiceCreationMode } from '@/lib/api/sys-config'
 import type { ShopPOResponse, UserResponse } from '@/types/api'
 
 const schema = z.object({
@@ -39,6 +47,7 @@ interface ConfirmShopPODialogProps {
 
 export function ConfirmShopPODialog({ open, onClose, onSuccess, po }: ConfirmShopPODialogProps) {
   const [usersList, setUsersList] = useState<UserResponse[]>([])
+  const [mode, setMode] = useState<InvoiceCreationMode>(DEFAULT_INVOICE_CREATION_MODE)
 
   const form = useForm<FormValues>({
     resolver: zodResolver(schema),
@@ -51,14 +60,20 @@ export function ConfirmShopPODialog({ open, onClose, onSuccess, po }: ConfirmSho
     usersApi.list()
       .then((res) => setUsersList(res))
       .catch((err) => toast.add({ title: 'Failed to load users', description: getApiError(err), type: 'error' }))
+    invoiceCreationModeApi.get().then(setMode).catch(() => {})
   }, [open])
 
   if (!po) return null
 
   async function onSubmit(values: FormValues) {
     try {
-      await shopPosApi.confirm(po!.id, values.confirmedByUserId)
-      toast.add({ title: 'Shop PO confirmed', type: 'success' })
+      if (mode === 'ModeA') {
+        await shopPosApi.confirmAndCreateInvoice(po!.id, values.confirmedByUserId)
+        toast.add({ title: 'Shop PO confirmed and invoice created', type: 'success' })
+      } else {
+        await shopPosApi.confirm(po!.id, values.confirmedByUserId)
+        toast.add({ title: 'Shop PO confirmed', type: 'success' })
+      }
       onSuccess()
       onClose()
     } catch (err) {
@@ -71,7 +86,10 @@ export function ConfirmShopPODialog({ open, onClose, onSuccess, po }: ConfirmSho
       <DialogContent className="sm:max-w-md">
         <DialogHeader>
           <DialogTitle>Confirm Shop PO</DialogTitle>
-          <DialogDescription>{po.storeName} — Rs. {po.totalAmount.toLocaleString()}</DialogDescription>
+          <DialogDescription>
+            {po.storeName} — Rs. {po.totalAmount.toLocaleString()}
+            {mode === 'ModeA' && ' · a draft invoice will be created'}
+          </DialogDescription>
         </DialogHeader>
 
         <form onSubmit={form.handleSubmit(onSubmit)} className="flex flex-col gap-6">

distribution_fe/app/(dashboard)/sales/invoices/[id]/edit/page.tsx

@@ -0,0 +1,342 @@
+'use client'
+
+import { useEffect, useMemo, useState } from 'react'
+import { useParams, useRouter } from 'next/navigation'
+import { HugeiconsIcon } from '@hugeicons/react'
+import { Add01Icon, ArrowLeft01Icon, Delete02Icon, Undo02Icon } from '@hugeicons/core-free-icons'
+import { Badge } from '@/components/ui/badge'
+import { Button } from '@/components/ui/button'
+import { Input } from '@/components/ui/input'
+import {
+  Select,
+  SelectContent,
+  SelectItem,
+  SelectTrigger,
+  SelectValue,
+} from '@/components/ui/select'
+import { InvoiceTemplate } from '@/components/invoice/invoice-template'
+import { toast } from '@/components/ui/toast'
+import {
+  invoices as invoicesApi,
+  users as usersApi,
+  items as itemsApi,
+  priceLists as priceListsApi,
+  getApiError,
+  getPaginatedItems,
+} from '@/lib/api/index'
+import type { InvoiceItemResponse, InvoiceResponse, ItemSummaryResponse, UserResponse } from '@/types/api'
+
+interface AddedLine {
+  key: string
+  itemId: string
+  name: string
+  qty: string
+  price: string
+}
+
+const NEW_PREFIX = 'new:'
+const isNew = (item: InvoiceItemResponse) => item.id.startsWith(NEW_PREFIX)
+const addedKey = (item: InvoiceItemResponse) => item.id.slice(NEW_PREFIX.length)
+
+// Full-page editor for a Draft invoice, on the invoice template: change quantity/price, delete (strike)
+// lines and add items that were not on the PO. Each save is recorded as a new invoice version.
+export default function InvoiceEditPage() {
+  const router = useRouter()
+  const params = useParams<{ id: string }>()
+  const invoiceId = params.id
+  const backToInvoice = () => router.push(`/sales/invoices/${invoiceId}`)
+
+  const [full, setFull] = useState<InvoiceResponse | null>(null)
+  const [loading, setLoading] = useState(true)
+  const [qty, setQty] = useState<Record<string, string>>({})
+  const [price, setPrice] = useState<Record<string, string>>({})
+  const [removed, setRemoved] = useState<Record<string, boolean>>({})
+  const [added, setAdded] = useState<AddedLine[]>([])
+  const [catalogue, setCatalogue] = useState<ItemSummaryResponse[]>([])
+  const [pickItemId, setPickItemId] = useState('')
+  const [pickQty, setPickQty] = useState('1')
+  const [pickPrice, setPickPrice] = useState('')
+  const [userId, setUserId] = useState('')
+  const [usersList, setUsersList] = useState<UserResponse[]>([])
+  const [saving, setSaving] = useState(false)
+
+  useEffect(() => {
+    invoicesApi.get(invoiceId)
+      .then((inv) => {
+        if (inv.status !== 'Draft') {
+          toast.add({ title: 'Only Draft invoices can be edited', type: 'error' })
+          router.replace(`/sales/invoices/${invoiceId}`)
+          return
+        }
+        setFull(inv)
+        setQty(Object.fromEntries(inv.items.map((i) => [i.id, String(i.quantity)])))
+        setPrice(Object.fromEntries(inv.items.map((i) => [i.id, String(i.unitPrice)])))
+        setRemoved(Object.fromEntries(inv.items.map((i) => [i.id, i.isRemoved])))
+      })
+      .catch((err) => {
+        toast.add({ title: 'Failed to load invoice', description: getApiError(err), type: 'error' })
+        router.push('/sales/orders')
+      })
+      .finally(() => setLoading(false))
+    usersApi.list()
+      .then(setUsersList)
+      .catch((err) => toast.add({ title: 'Failed to load users', description: getApiError(err), type: 'error' }))
+    itemsApi.list({ pageSize: 200 })
+      .then((res) => setCatalogue(getPaginatedItems(res)))
+      .catch((err) => toast.add({ title: 'Failed to load items', description: getApiError(err), type: 'error' }))
+  }, [invoiceId, router])
+
+  // The template renders this copy so line amounts and the total follow what is typed.
+  const live = useMemo<InvoiceResponse | null>(() => {
+    if (!full) return null
+    const existing = full.items.map((i) => ({
+      ...i,
+      quantity: Number(qty[i.id]) || 0,
+      unitPrice: Number(price[i.id]) || 0,
+      isRemoved: !!removed[i.id],
+    }))
+    const extra: InvoiceItemResponse[] = added.map((a) => ({
+      id: NEW_PREFIX + a.key,
+      shopPOItemId: null,
+      itemId: a.itemId,
+      itemName: a.name,
+      orderedQuantity: null,
+      quantity: Number(a.qty) || 0,
+      unitPrice: Number(a.price) || 0,
+      isRemoved: false,
+    }))
+    const items = [...existing, ...extra]
+    const totalAmount = items.filter((i) => !i.isRemoved).reduce((s, i) => s + i.quantity * i.unitPrice, 0)
+    return { ...full, items, totalAmount }
+  }, [full, qty, price, removed, added])
+
+  // Items not already on the invoice (a deleted line can be restored with Undo instead).
+  const availableItems = catalogue.filter((c) => !live?.items.some((i) => i.itemId === c.id))
+
+  // Picking an item fills in its price: the store's price list, falling back to the item's default price.
+  async function pickItem(itemId: string) {
+    setPickItemId(itemId)
+    const item = catalogue.find((c) => c.id === itemId)
+    if (!item || !full) return
+    setPickPrice(String(item.salePrice))
+    try {
+      const res = await priceListsApi.resolve({
+        itemId,
+        storeId: full.storeId,
+        saleDate: new Date().toISOString().slice(0, 10),
+      })
+      setPickPrice(String(res.price))
+    } catch {
+      // No price list entry for this store — keep the default price.
+    }
+  }
+
+  // The line currently typed into the add row, or null when nothing valid is picked.
+  function pendingLine(): AddedLine | null {
+    const item = catalogue.find((c) => c.id === pickItemId)
+    if (!item || !(Number(pickQty) > 0) || pickPrice === '' || Number(pickPrice) < 0) return null
+    return { key: crypto.randomUUID(), itemId: item.id, name: item.name, qty: pickQty, price: pickPrice }
+  }
+
+  function addItem() {
+    const line = pendingLine()
+    if (!line) {
+      toast.add({ title: 'Pick an item and enter a quantity above zero', type: 'error' })
+      return
+    }
+    setAdded((a) => [...a, line])
+    setPickItemId('')
+    setPickQty('1')
+    setPickPrice('')
+  }
+
+  const changeSummary = useMemo(() => {
+    if (!full) return []
+    const edited = full.items.filter(
+      (i) => !removed[i.id] && (Number(qty[i.id]) !== i.quantity || Number(price[i.id]) !== i.unitPrice),
+    ).length
+    const struck = full.items.filter((i) => !!removed[i.id] !== i.isRemoved).length
+    return [
+      added.length && `${added.length} added`,
+      struck && `${struck} removed/restored`,
+      edited && `${edited} edited`,
+    ].filter(Boolean) as string[]
+  }, [full, qty, price, removed, added])
+
+  const dirty = changeSummary.length > 0
+
+  // Warn before the tab is closed/reloaded with unsaved edits.
+  useEffect(() => {
+    if (!dirty) return
+    const warn = (e: BeforeUnloadEvent) => e.preventDefault()
+    window.addEventListener('beforeunload', warn)
+    return () => window.removeEventListener('beforeunload', warn)
+  }, [dirty])
+
+  async function save() {
+    if (!full) return
+    if (!userId) {
+      toast.add({ title: 'Select who is editing', type: 'error' })
+      return
+    }
+    // An item picked in the add row but not yet added is included, so it is not silently lost.
+    const pending = pendingLine()
+    const newLines = pending ? [...added, pending] : added
+    setSaving(true)
+    try {
+      await invoicesApi.updateItems(
+        full.id,
+        [
+          ...full.items.map((i) => ({
+            invoiceItemId: i.id,
+            quantity: Number(qty[i.id]),
+            unitPrice: Number(price[i.id]),
+            isRemoved: !!removed[i.id],
+          })),
+          ...newLines.map((a) => ({ itemId: a.itemId, quantity: Number(a.qty), unitPrice: Number(a.price) })),
+        ],
+        userId,
+      )
+      toast.add({ title: 'Invoice updated', type: 'success' })
+      // Navigating away right after a successful save; clear the unsaved-changes guard first.
+      setAdded([])
+      setQty(Object.fromEntries(full.items.map((i) => [i.id, String(i.quantity)])))
+      setPrice(Object.fromEntries(full.items.map((i) => [i.id, String(i.unitPrice)])))
+      setRemoved(Object.fromEntries(full.items.map((i) => [i.id, i.isRemoved])))
+      backToInvoice()
+    } catch (err) {
+      toast.add({ title: 'Failed to update invoice', description: getApiError(err), type: 'error' })
+    } finally {
+      setSaving(false)
+    }
+  }
+
+  return (
+    <div className="flex flex-col gap-6">
+      <div className="flex items-center justify-between gap-4">
+        <div className="flex items-center gap-4">
+          <Button type="button" variant="outline" size="sm" onClick={backToInvoice}>
+            <HugeiconsIcon icon={ArrowLeft01Icon} size={16} strokeWidth={2} />
+            Back
+          </Button>
+          <div>
+            <div className="flex items-center gap-2">
+              <h1 className="text-2xl font-semibold text-foreground">Edit Draft Invoice</h1>
+              {full && <Badge variant="secondary">{full.status}</Badge>}
+            </div>
+            <p className="text-sm text-muted-foreground">
+              Change quantities and prices, delete lines, or add items. Quantity on a PO line cannot exceed the
+              ordered quantity. Every save creates a new version.
+            </p>
+          </div>
+        </div>
+      </div>
+
+      {loading || !live ? (
+        <p className="text-sm text-muted-foreground">Loading invoice…</p>
+      ) : (
+        <>
+          <InvoiceTemplate
+            invoice={live}
+            renderQuantity={(item) => (
+              <Input
+                type="number" min={0} max={item.orderedQuantity ?? undefined}
+                className="ml-auto h-8 w-20 text-right"
+                value={isNew(item) ? added.find((a) => a.key === addedKey(item))?.qty ?? '' : qty[item.id] ?? ''}
+                onChange={(e) => isNew(item)
+                  ? setAdded((a) => a.map((l) => l.key === addedKey(item) ? { ...l, qty: e.target.value } : l))
+                  : setQty((q) => ({ ...q, [item.id]: e.target.value }))}
+              />
+            )}
+            renderUnitPrice={(item) => (
+              <Input
+                type="number" min={0} step="0.01"
+                className="ml-auto h-8 w-28 text-right"
+                value={isNew(item) ? added.find((a) => a.key === addedKey(item))?.price ?? '' : price[item.id] ?? ''}
+                onChange={(e) => isNew(item)
+                  ? setAdded((a) => a.map((l) => l.key === addedKey(item) ? { ...l, price: e.target.value } : l))
+                  : setPrice((p) => ({ ...p, [item.id]: e.target.value }))}
+              />
+            )}
+            renderActions={(item) => (
+              <Button
+                type="button" variant="ghost" size="icon-sm"
+                className={item.isRemoved ? 'text-muted-foreground' : 'text-destructive hover:text-destructive'}
+                aria-label={item.isRemoved ? 'Restore line' : 'Delete line'}
+                title={item.isRemoved ? 'Restore line' : 'Delete line'}
+                onClick={() => isNew(item)
+                  ? setAdded((a) => a.filter((l) => l.key !== addedKey(item)))
+                  : setRemoved((r) => ({ ...r, [item.id]: !r[item.id] }))}
+              >
+                <HugeiconsIcon icon={item.isRemoved ? Undo02Icon : Delete02Icon} size={16} />
+              </Button>
+            )}
+            footerRow={
+              // Cells line up with the table columns: Item · Qty · Unit Price · Amount · action.
+              <tr className="bg-neutral-50 print:hidden" onKeyDown={(e) => { if (e.key === 'Enter') { e.preventDefault(); addItem() } }}>
+                <td className="px-2 py-3">
+                  <Select value={pickItemId} onValueChange={(v) => pickItem(v ?? '')}>
+                    <SelectTrigger className="h-8 w-full"><SelectValue placeholder="Add an item…" /></SelectTrigger>
+                    <SelectContent>
+                      {availableItems.length === 0
+                        ? <div className="px-3 py-2 text-sm text-muted-foreground">No more items to add</div>
+                        : availableItems.map((c) => (
+                            <SelectItem key={c.id} value={c.id}>
+                              {c.name} <span className="text-muted-foreground">· {c.sku}</span>
+                            </SelectItem>
+                          ))}
+                    </SelectContent>
+                  </Select>
+                </td>
+                <td className="px-2 py-3">
+                  <Input
+                    type="number" min={1} aria-label="Quantity" className="ml-auto h-8 w-20 text-right"
+                    value={pickQty} onChange={(e) => setPickQty(e.target.value)}
+                  />
+                </td>
+                <td className="px-2 py-3">
+                  <Input
+                    type="number" min={0} step="0.01" aria-label="Unit price" placeholder="Price"
+                    className="ml-auto h-8 w-28 text-right"
+                    value={pickPrice} onChange={(e) => setPickPrice(e.target.value)}
+                  />
+                </td>
+                <td className="px-2 py-3 text-right text-sm text-neutral-500">
+                  {pickItemId ? ((Number(pickQty) || 0) * (Number(pickPrice) || 0)).toLocaleString('en-US', { minimumFractionDigits: 2 }) : ''}
+                </td>
+                <td className="px-2 py-3 text-right">
+                  <Button
+                    type="button" size="icon-sm" aria-label="Add item" title="Add item (Enter)"
+                    onClick={addItem} disabled={!pickItemId}
+                  >
+                    <HugeiconsIcon icon={Add01Icon} size={16} />
+                  </Button>
+                </td>
+              </tr>
+            }
+          />
+
+          <div className="mx-auto flex w-full max-w-[210mm] flex-wrap items-center justify-between gap-3">
+            <div className="w-64">
+              <Select value={userId} onValueChange={(v) => setUserId(v ?? '')}>
+                <SelectTrigger><SelectValue placeholder="Edited by (temporary)..." /></SelectTrigger>
+                <SelectContent>
+                  {usersList.map((u) => <SelectItem key={u.id} value={u.id}>{u.fullName}</SelectItem>)}
+                </SelectContent>
+              </Select>
+            </div>
+            <p className="text-xs text-muted-foreground">
+              {dirty ? `Unsaved: ${changeSummary.join(', ')}` : 'No changes yet'}
+            </p>
+            <div className="flex items-center gap-2">
+              <Button type="button" variant="outline" onClick={backToInvoice}>Cancel</Button>
+              <Button type="button" onClick={save} disabled={saving || (!dirty && !pendingLine())}>
+                {saving ? 'Saving…' : 'Save changes'}
+              </Button>
+            </div>
+          </div>
+        </>
+      )}
+    </div>
+  )
+}

distribution_fe/app/(dashboard)/sales/invoices/[id]/page.tsx

@@ -8,12 +8,19 @@ import { Badge } from '@/components/ui/badge'
 import { Button } from '@/components/ui/button'
 import { toast } from '@/components/ui/toast'
 import { invoices as invoicesApi, payments as paymentsApi, getApiError } from '@/lib/api/index'
-import type { InvoiceResponse, InvoiceStatus, PaymentResponse, PaymentMethod, PaymentStatus } from '@/types/api'
+import type { InvoiceResponse, InvoiceStatus, InvoiceVersionResponse, PaymentResponse, PaymentMethod, PaymentStatus } from '@/types/api'
 
 import { PaymentSheet } from '../../payments/_components/payment-sheet'
 import { PaymentViewSheet } from '../../payments/_components/payment-view-sheet'
 import { InvoiceActionDialog } from '../../orders/_components/invoice-action-dialog'
 
+const STAGE_LABEL: Record<InvoiceVersionResponse['stage'], string> = {
+  Created: 'Created',
+  DraftEdited: 'Draft edited',
+  Printed: 'Printed',
+  Finalized: 'Finalized',
+}
+
 const INVOICE_STATUS_VARIANT: Record<InvoiceStatus, 'default' | 'secondary' | 'outline'> = {
   Draft: 'secondary',
   Printed: 'outline',
@@ -61,10 +68,12 @@ export default function InvoiceViewPage() {
   const [viewPayment, setViewPayment] = useState<PaymentResponse | null>(null)
   const [actionOpen, setActionOpen] = useState(false)
   const [actionMode, setActionMode] = useState<'print' | 'finalize'>('print')
+  const [versions, setVersions] = useState<InvoiceVersionResponse[]>([])
 
   const fetchInvoice = useCallback(async () => {
-    const inv = await invoicesApi.get(params.id)
+    const [inv, vers] = await Promise.all([invoicesApi.get(params.id), invoicesApi.versions(params.id)])
     setInvoice(inv)
+    setVersions(vers)
     return inv
   }, [params.id])
 
@@ -139,11 +148,21 @@ export default function InvoiceViewPage() {
         </div>
 
         <div className="flex items-center gap-2">
+          {invoice.status === 'Draft' && (
+            <Button type="button" variant="outline" onClick={() => router.push(`/sales/invoices/${invoice.id}/edit`)}>
+              Edit Items
+            </Button>
+          )}
           {invoice.status === 'Draft' && (
             <Button type="button" onClick={handlePrint}>
               Print Invoice
             </Button>
           )}
+          {invoice.status !== 'Draft' && (
+            <Button type="button" variant="outline" onClick={() => window.open(`/invoices/${invoice.id}/print`, '_blank')}>
+              Reprint
+            </Button>
+          )}
           {invoice.status === 'Printed' && (
             <Button type="button" onClick={handleFinalize}>
               Finalize Invoice
@@ -160,6 +179,7 @@ export default function InvoiceViewPage() {
 
       <div className="grid grid-cols-2 gap-4 rounded-2xl border p-4 sm:grid-cols-4">
         <Stat label="Total" value={fmtAmount(invoice.totalAmount)} />
+        {invoice.discountAmount > 0 && <Stat label="Scheme discount (included)" value={fmtAmount(invoice.discountAmount)} />}
         <Stat label="Paid" value={fmtAmount(paidAmount)} />
         <Stat label="Balance" value={fmtAmount(balance)} />
         <Stat label="Created" value={fmtDateTime(invoice.createdAt)} />
@@ -167,6 +187,84 @@ export default function InvoiceViewPage() {
         <Stat label="Finalized" value={fmtDateTime(invoice.finalizedAt)} />
       </div>
 
+      <div className="rounded-2xl border p-6">
+        <div className="mb-4">
+          <h3 className="text-sm font-medium text-foreground">Items</h3>
+          <p className="text-sm text-muted-foreground">Ordered quantity is the original PO; quantity is what is billed now.</p>
+        </div>
+        <div className="overflow-x-auto rounded-xl border">
+          <table className="w-full text-sm">
+            <thead className="bg-muted/50">
+              <tr>
+                <th className="px-3 py-2 text-left font-medium">Item</th>
+                <th className="w-24 px-3 py-2 text-right font-medium">Ordered</th>
+                <th className="w-24 px-3 py-2 text-right font-medium">Billed</th>
+                <th className="w-28 px-3 py-2 text-right font-medium">Unit price</th>
+                <th className="w-32 px-3 py-2 text-right font-medium">Line total</th>
+              </tr>
+            </thead>
+            <tbody>
+              {invoice.items.length === 0 ? (
+                <tr>
+                  <td colSpan={5} className="px-3 py-4 text-center text-muted-foreground">No items.</td>
+                </tr>
+              ) : (
+                invoice.items.map((i) => (
+                  <tr key={i.id} className={`border-t ${i.isRemoved ? 'text-muted-foreground line-through' : ''}`}>
+                    <td className="px-3 py-2">
+                      {i.itemName}
+                      {i.orderedQuantity === null && <Badge variant="outline" className="ml-2 no-underline">Added</Badge>}
+                      {i.isRemoved && <Badge variant="secondary" className="ml-2 no-underline">Removed</Badge>}
+                    </td>
+                    <td className="px-3 py-2 text-right">{i.orderedQuantity ?? '—'}</td>
+                    <td className={`px-3 py-2 text-right ${!i.isRemoved && i.quantity !== i.orderedQuantity ? 'font-medium text-destructive' : ''}`}>
+                      {i.quantity}
+                    </td>
+                    <td className="px-3 py-2 text-right">{fmtAmount(i.unitPrice)}</td>
+                    <td className="px-3 py-2 text-right font-medium">{i.isRemoved ? '—' : fmtAmount(i.quantity * i.unitPrice)}</td>
+                  </tr>
+                ))
+              )}
+            </tbody>
+          </table>
+        </div>
+      </div>
+
+      <div className="rounded-2xl border p-6">
+        <div className="mb-4">
+          <h3 className="text-sm font-medium text-foreground">Version history</h3>
+          <p className="text-sm text-muted-foreground">
+            Quantities after each change, so you can compare the original, printed and finalized copies.
+          </p>
+        </div>
+        <div className="overflow-x-auto rounded-xl border">
+          <table className="w-full text-sm">
+            <thead className="bg-muted/50">
+              <tr>
+                <th className="w-16 px-3 py-2 text-left font-medium">Version</th>
+                <th className="w-32 px-3 py-2 text-left font-medium">Stage</th>
+                <th className="w-40 px-3 py-2 text-left font-medium">When</th>
+                <th className="px-3 py-2 text-left font-medium">Quantities</th>
+                <th className="w-32 px-3 py-2 text-right font-medium">Total</th>
+              </tr>
+            </thead>
+            <tbody>
+              {versions.map((v) => (
+                <tr key={v.id} className="border-t align-top">
+                  <td className="px-3 py-2 font-mono">v{v.versionNumber}</td>
+                  <td className="px-3 py-2"><Badge variant="outline">{STAGE_LABEL[v.stage]}</Badge></td>
+                  <td className="px-3 py-2">{fmtDateTime(v.createdAt)}</td>
+                  <td className="px-3 py-2">
+                    {v.items.map((i) => (i.isRemoved ? `${i.itemName} (removed)` : `${i.itemName} × ${i.quantity}`)).join(', ') || '—'}
+                  </td>
+                  <td className="px-3 py-2 text-right font-medium">{fmtAmount(v.totalAmount)}</td>
+                </tr>
+              ))}
+            </tbody>
+          </table>
+        </div>
+      </div>
+
       <div className="rounded-2xl border p-6">
         <div className="mb-4">
           <h3 className="text-sm font-medium text-foreground">Payments</h3>

distribution_fe/app/(dashboard)/sales/orders/_components/create-invoice-dialog.tsx

@@ -0,0 +1,142 @@
+'use client'
+
+import { useEffect, useState } from 'react'
+import { useForm, zodResolver, z } from '@/lib/form'
+import { FormField } from '@/components/shared/form-field'
+import {
+  Select,
+  SelectContent,
+  SelectItem,
+  SelectTrigger,
+  SelectValue,
+} from '@/components/ui/select'
+import { Button } from '@/components/ui/button'
+import {
+  Dialog,
+  DialogContent,
+  DialogDescription,
+  DialogFooter,
+  DialogHeader,
+  DialogTitle,
+} from '@/components/ui/dialog'
+import { FieldGroup } from '@/components/ui/field'
+import { toast } from '@/components/ui/toast'
+import { invoices as invoicesApi, shopPos as shopPosApi, users as usersApi, getApiError } from '@/lib/api/index'
+import type { ShopPOResponse, UserResponse } from '@/types/api'
+
+const schema = z.object({
+  shopPOId: z.string().min(1, 'Shop PO is required'),
+  userId: z.string().min(1, 'User is required'),
+})
+
+type FormValues = z.infer<typeof schema>
+
+interface CreateInvoiceDialogProps {
+  open: boolean
+  onClose: () => void
+  onSuccess: () => void
+}
+
+const fmtAmount = (n: number) => `Rs. ${n.toLocaleString()}`
+const truncId = (id: string) => id.substring(0, 8)
+
+export function CreateInvoiceDialog({ open, onClose, onSuccess }: CreateInvoiceDialogProps) {
+  const [pos, setPos] = useState<ShopPOResponse[]>([])
+  const [usersList, setUsersList] = useState<UserResponse[]>([])
+  const [loading, setLoading] = useState(false)
+
+  const form = useForm<FormValues>({
+    resolver: zodResolver(schema),
+    defaultValues: { shopPOId: '', userId: '' },
+  })
+
+  useEffect(() => {
+    if (!open) return
+    form.reset({ shopPOId: '', userId: '' })
+    setLoading(true)
+    Promise.all([
+      shopPosApi.confirmedWithoutInvoice(),
+      usersApi.list(),
+    ])
+      .then(([posRes, usersRes]) => {
+        setPos(posRes)
+        setUsersList(usersRes)
+      })
+      .catch((err) => toast.add({ title: 'Failed to load data', description: getApiError(err), type: 'error' }))
+      .finally(() => setLoading(false))
+  }, [open])
+
+  async function onSubmit(values: FormValues) {
+    try {
+      await invoicesApi.create(values.shopPOId, values.userId)
+      toast.add({ title: 'Invoice created', type: 'success' })
+      onSuccess()
+      onClose()
+    } catch (err) {
+      toast.add({ title: 'Failed to create invoice', description: getApiError(err), type: 'error' })
+    }
+  }
+
+  return (
+    <Dialog open={open} onOpenChange={(v) => { if (!v) onClose() }}>
+      <DialogContent className="sm:max-w-lg">
+        <DialogHeader>
+          <DialogTitle>Create Invoice</DialogTitle>
+          <DialogDescription>Generate an invoice from a confirmed Shop PO that doesn&apos;t have one yet.</DialogDescription>
+        </DialogHeader>
+
+        <form onSubmit={form.handleSubmit(onSubmit)} className="flex flex-col gap-6">
+          <FieldGroup>
+            <FormField
+              control={form.control}
+              name="shopPOId"
+              label="Shop PO"
+              required
+              render={({ field }) => (
+                <Select value={field.value as string} onValueChange={field.onChange} disabled={loading || pos.length === 0}>
+                  <SelectTrigger>
+                    <SelectValue placeholder={loading ? 'Loading…' : pos.length === 0 ? 'No eligible Shop POs' : 'Select Shop PO...'} />
+                  </SelectTrigger>
+                  <SelectContent>
+                    {pos.map((po) => (
+                      <SelectItem key={po.id} value={po.id}>
+                        {po.storeName} — {fmtAmount(po.totalAmount)} [{truncId(po.id)}]
+                      </SelectItem>
+                    ))}
+                  </SelectContent>
+                </Select>
+              )}
+            />
+
+            <FormField
+              control={form.control}
+              name="userId"
+              label="Created By"
+              description="Temporary — required until auth resolves the logged-in user automatically."
+              required
+              render={({ field }) => (
+                <Select value={field.value as string} onValueChange={field.onChange}>
+                  <SelectTrigger>
+                    <SelectValue placeholder="Select user..." />
+                  </SelectTrigger>
+                  <SelectContent>
+                    {usersList.map((user) => (
+                      <SelectItem key={user.id} value={user.id}>{user.fullName}</SelectItem>
+                    ))}
+                  </SelectContent>
+                </Select>
+              )}
+            />
+          </FieldGroup>
+
+          <DialogFooter>
+            <Button type="button" variant="outline" onClick={onClose}>Cancel</Button>
+            <Button type="submit" disabled={form.formState.isSubmitting || pos.length === 0}>
+              {form.formState.isSubmitting ? 'Saving…' : 'Create Invoice'}
+            </Button>
+          </DialogFooter>
+        </form>
+      </DialogContent>
+    </Dialog>
+  )
+}

distribution_fe/app/(dashboard)/sales/orders/_components/invoice-action-dialog.tsx

@@ -21,6 +21,7 @@ import {
 } from '@/components/ui/dialog'
 import { FieldGroup } from '@/components/ui/field'
 import { toast } from '@/components/ui/toast'
+import { Input } from '@/components/ui/input'
 import { invoices as invoicesApi, users as usersApi, getApiError, getPaginatedItems } from '@/lib/api/index'
 import type { InvoiceResponse, UserResponse } from '@/types/api'
 
@@ -39,13 +40,17 @@ interface InvoiceActionDialogProps {
 }
 
 const COPY = {
-  print: { title: 'Mark Invoice as Printed', label: 'Printed By', action: 'Mark as Printed', success: 'Invoice marked as printed' },
+  print: { title: 'Print Invoice', label: 'Printed By', action: 'Print Invoice', success: 'Invoice printed' },
   finalize: { title: 'Finalize Invoice', label: 'Finalized By', action: 'Finalize Invoice', success: 'Invoice finalized' },
 }
 
 export function InvoiceActionDialog({ open, onClose, onSuccess, invoice, mode }: InvoiceActionDialogProps) {
   const [usersList, setUsersList] = useState<UserResponse[]>([])
   const copy = COPY[mode]
+  const [qty, setQty] = useState<Record<string, string>>({})
+  const [removed, setRemoved] = useState<Record<string, boolean>>({})
+  // Rows from the list endpoint carry no line items, so the full invoice is loaded for the finalize table.
+  const [full, setFull] = useState<InvoiceResponse | null>(null)
 
   const form = useForm<FormValues>({
     resolver: zodResolver(schema),
@@ -55,6 +60,18 @@ export function InvoiceActionDialog({ open, onClose, onSuccess, invoice, mode }:
   useEffect(() => {
     if (!open) return
     form.reset({ userId: '' })
+    setFull(null)
+    setQty({})
+    setRemoved({})
+    if (invoice) {
+      invoicesApi.get(invoice.id)
+        .then((inv) => {
+          setFull(inv)
+          setQty(Object.fromEntries(inv.items.map((i) => [i.id, String(i.quantity)])))
+          setRemoved(Object.fromEntries(inv.items.map((i) => [i.id, i.isRemoved])))
+        })
+        .catch((err) => toast.add({ title: 'Failed to load invoice', description: getApiError(err), type: 'error' }))
+    }
     usersApi.list()
       .then((res) => setUsersList(res))
       .catch((err) => toast.add({ title: 'Failed to load users', description: getApiError(err), type: 'error' }))
@@ -62,21 +79,35 @@ export function InvoiceActionDialog({ open, onClose, onSuccess, invoice, mode }:
 
   if (!invoice) return null
 
+  const lines = full?.items ?? []
+
   async function onSubmit(values: FormValues) {
+    // Opened synchronously, while the click still counts as a user gesture, so the browser allows the new tab.
+    const printTab = mode === 'print' ? window.open('', '_blank') : null
     try {
-      if (mode === 'print') await invoicesApi.print(invoice!.id, values.userId)
-      else await invoicesApi.finalize(invoice!.id, values.userId)
+      if (mode === 'print') {
+        await invoicesApi.print(invoice!.id, values.userId)
+        if (printTab) printTab.location.href = `/invoices/${invoice!.id}/print`
+      } else {
+        if (!full) throw new Error('Invoice is still loading')
+        // Only lines the agent changed on the printed copy are sent as adjustments.
+        const adjustments = lines
+          .filter((i) => Number(qty[i.id]) !== i.quantity || !!removed[i.id] !== i.isRemoved)
+          .map((i) => ({ invoiceItemId: i.id, adjustedQuantity: Number(qty[i.id]), isRemoved: !!removed[i.id] }))
+        await invoicesApi.finalize(invoice!.id, values.userId, adjustments)
+      }
       toast.add({ title: copy.success, type: 'success' })
       onSuccess()
       onClose()
     } catch (err) {
+      printTab?.close()
       toast.add({ title: `Failed to ${mode} invoice`, description: getApiError(err), type: 'error' })
     }
   }
 
   return (
     <Dialog open={open} onOpenChange={(v) => { if (!v) onClose() }}>
-      <DialogContent className="sm:max-w-md">
+      <DialogContent className="sm:max-w-xl">
         <DialogHeader>
           <DialogTitle>{copy.title}</DialogTitle>
           <DialogDescription>{invoice.storeName} — Rs. {invoice.totalAmount.toLocaleString()}</DialogDescription>
@@ -106,6 +137,45 @@ export function InvoiceActionDialog({ open, onClose, onSuccess, invoice, mode }:
             />
           </FieldGroup>
 
+          {mode === 'finalize' && lines.length > 0 && (
+            <div className="flex flex-col gap-2">
+              <p className="text-sm font-medium">Edits from the printed copy</p>
+              <div className="overflow-x-auto rounded-xl border">
+                <table className="w-full text-sm">
+                  <thead className="bg-muted/50">
+                    <tr>
+                      <th className="px-3 py-2 text-left font-medium">Item</th>
+                      <th className="w-20 px-3 py-2 text-right font-medium">Printed</th>
+                      <th className="w-24 px-3 py-2 text-right font-medium">Final qty</th>
+                      <th className="w-24 px-3 py-2" />
+                    </tr>
+                  </thead>
+                  <tbody>
+                    {lines.map((i) => (
+                      <tr key={i.id} className={`border-t ${removed[i.id] ? "text-muted-foreground line-through" : ""}`}>
+                        <td className="px-3 py-2">{i.itemName}</td>
+                        <td className="px-3 py-2 text-right">{i.quantity}</td>
+                        <td className="px-3 py-2">
+                          <Input
+                            type="number" min={0} max={i.orderedQuantity ?? undefined} disabled={!!removed[i.id]}
+                            className="h-8 text-right"
+                            value={qty[i.id] ?? ''}
+                            onChange={(e) => setQty((q) => ({ ...q, [i.id]: e.target.value }))}
+                          />
+                        </td>
+                        <td className="px-3 py-2 text-right no-underline">
+                          <Button type="button" variant="ghost" size="sm" onClick={() => setRemoved((r) => ({ ...r, [i.id]: !r[i.id] }))}>
+                            {removed[i.id] ? 'Undo' : 'Remove'}
+                          </Button>
+                        </td>
+                      </tr>
+                    ))}
+                  </tbody>
+                </table>
+              </div>
+            </div>
+          )}
+
           <DialogFooter>
             <Button type="button" variant="outline" onClick={onClose}>Cancel</Button>
             <Button type="submit" disabled={form.formState.isSubmitting}>

distribution_fe/app/(dashboard)/sales/orders/_components/order-view-sheet.tsx

@@ -1,35 +1,15 @@
 'use client'
 
-import { Badge } from '@/components/ui/badge'
+import { Button } from '@/components/ui/button'
 import {
   Dialog,
   DialogContent,
   DialogHeader,
   DialogTitle,
 } from '@/components/ui/dialog'
-import type { InvoiceResponse, InvoiceStatus, PaymentStatus } from '@/types/api'
-
-const INVOICE_STATUS_VARIANT: Record<InvoiceStatus, 'default' | 'secondary' | 'destructive'> = {
-  Draft: 'secondary',
-  Printed: 'secondary',
-  Finalized: 'default',
-}
-
-const PAYMENT_STATUS_VARIANT: Record<PaymentStatus, 'default' | 'secondary' | 'destructive'> = {
-  Pending: 'secondary',
-  PartiallyPaid: 'secondary',
-  Paid: 'default',
-}
-
-const fmtAmount = (n: number) => `Rs. ${n.toLocaleString()}`
-const truncId = (id: string) => id.substring(0, 8)
-
-const fmtDateTime = (v: string | null) =>
-  v
-    ? new Date(v).toLocaleString('en-GB', {
-        day: '2-digit', month: 'short', year: 'numeric', hour: '2-digit', minute: '2-digit',
-      })
-    : '—'
+import { InvoiceTemplate } from '@/components/invoice/invoice-template'
+import { useInvoiceDocument } from '@/components/invoice/use-invoice-document'
+import type { InvoiceResponse } from '@/types/api'
 
 interface OrderViewSheetProps {
   open: boolean
@@ -37,36 +17,34 @@ interface OrderViewSheetProps {
   invoice: InvoiceResponse | null
 }
 
-function Row({ label, value }: { label: string; value: React.ReactNode }) {
-  return (
-    <div className="flex items-center justify-between py-2 text-sm border-b last:border-0">
-      <span className="text-muted-foreground">{label}</span>
-      <span className="font-medium text-right">{value}</span>
-    </div>
-  )
-}
-
+// Previews the invoice as the printed document. The list rows carry no line items, so the full invoice is fetched.
 export function OrderViewSheet({ open, onClose, invoice }: OrderViewSheetProps) {
+  const doc = useInvoiceDocument(invoice?.id, open)
+
   if (!invoice) return null
 
   return (
     <Dialog open={open} onOpenChange={(v) => !v && onClose()}>
-      <DialogContent className="overflow-y-auto sm:max-w-lg">
+      <DialogContent className="max-h-[90vh] overflow-y-auto sm:max-w-4xl">
         <DialogHeader>
-          <DialogTitle>Invoice Details</DialogTitle>
+          <DialogTitle>Invoice Preview</DialogTitle>
         </DialogHeader>
 
-        <div className="flex flex-col">
-          <Row label="Invoice ID" value={<span className="font-mono">{truncId(invoice.id)}</span>} />
-          <Row label="Shop PO" value={<span className="font-mono">{truncId(invoice.shopPOId)}</span>} />
-          <Row label="Store" value={invoice.storeName} />
-          <Row label="Status" value={<Badge variant={INVOICE_STATUS_VARIANT[invoice.status]}>{invoice.status}</Badge>} />
-          <Row label="Payment" value={<Badge variant={PAYMENT_STATUS_VARIANT[invoice.paymentStatus]}>{invoice.paymentStatus}</Badge>} />
-          <Row label="Total Amount" value={fmtAmount(invoice.totalAmount)} />
-          <Row label="Printed At" value={fmtDateTime(invoice.printedAt)} />
-          <Row label="Finalized At" value={fmtDateTime(invoice.finalizedAt)} />
-          <Row label="Created At" value={fmtDateTime(invoice.createdAt)} />
-        </div>
+        {doc.invoice ? (
+          <InvoiceTemplate invoice={doc.invoice} payments={doc.payments} customer={doc.customer} />
+        ) : (
+          <p className="py-10 text-center text-sm text-muted-foreground">
+            {doc.error ? `Failed to load invoice: ${doc.error}` : 'Loading invoice…'}
+          </p>
+        )}
+
+        {doc.invoice && doc.invoice.status !== 'Draft' && (
+          <div className="flex justify-end">
+            <Button type="button" variant="outline" onClick={() => window.open(`/invoices/${doc.invoice!.id}/print`, '_blank')}>
+              Open print view
+            </Button>
+          </div>
+        )}
       </DialogContent>
     </Dialog>
   )

distribution_fe/app/(dashboard)/sales/orders/_components/orders-client.tsx

@@ -1,16 +1,20 @@
 'use client'
 
 import { useState, useEffect, useCallback, useMemo } from 'react'
+import { useRouter } from 'next/navigation'
 
 import { DataTable } from '@/components/shared/data-table'
 import type { TableConfig } from '@/components/shared/data-table'
 import { Badge } from '@/components/ui/badge'
+import { Button } from '@/components/ui/button'
 import { toast } from '@/components/ui/toast'
-import { invoices as invoicesApi, getApiError, getPaginatedItems } from '@/lib/api/index'
+import { invoices as invoicesApi, invoiceCreationMode as invoiceCreationModeApi, DEFAULT_INVOICE_CREATION_MODE, getApiError, getPaginatedItems } from '@/lib/api/index'
+import type { InvoiceCreationMode } from '@/lib/api/sys-config'
 import type { InvoiceResponse, InvoiceStatus, PaymentStatus } from '@/types/api'
 
 import { OrderViewSheet } from './order-view-sheet'
 import { InvoiceActionDialog } from './invoice-action-dialog'
+import { CreateInvoiceDialog } from './create-invoice-dialog'
 import { PaymentSheet } from '../../payments/_components/payment-sheet'
 
 const fmtDate = (v: string) =>
@@ -32,6 +36,7 @@ const PAYMENT_STATUS_VARIANT: Record<PaymentStatus, 'default' | 'secondary' | 'd
 }
 
 export function OrdersClient() {
+  const router = useRouter()
   const [data, setData] = useState<InvoiceResponse[]>([])
   const [loading, setLoading] = useState(true)
   const [total, setTotal] = useState(0)
@@ -44,6 +49,12 @@ export function OrdersClient() {
   const [actionMode, setActionMode] = useState<'print' | 'finalize'>('print')
   const [paymentOpen, setPaymentOpen] = useState(false)
   const [paymentInvoice, setPaymentInvoice] = useState<InvoiceResponse | null>(null)
+  const [createOpen, setCreateOpen] = useState(false)
+  const [mode, setMode] = useState<InvoiceCreationMode>(DEFAULT_INVOICE_CREATION_MODE)
+
+  useEffect(() => {
+    invoiceCreationModeApi.get().then(setMode).catch(() => {})
+  }, [])
 
   const fetchData = useCallback(async (p: number, ps: number) => {
     setLoading(true)
@@ -67,6 +78,10 @@ export function OrdersClient() {
     setViewOpen(true)
   }
 
+  function handleEdit(row: InvoiceResponse) {
+    router.push(`/sales/invoices/${row.id}/edit`)
+  }
+
   function handlePrint(row: InvoiceResponse) {
     setSelectedInvoice(row)
     setActionMode('print')
@@ -147,12 +162,24 @@ export function OrdersClient() {
           label: 'View invoice',
           onClick: handleView,
         },
+        {
+          action: 'edit',
+          label: 'Edit draft items',
+          onClick: handleEdit,
+          visible: (target) => target.status === 'Draft',
+        },
         {
           action: 'print',
-          label: 'Mark as printed',
+          label: 'Print invoice',
           onClick: handlePrint,
           visible: (target) => target.status === 'Draft',
         },
+        {
+          action: 'print',
+          label: 'Reprint invoice',
+          onClick: (target) => window.open(`/invoices/${target.id}/print`, '_blank'),
+          visible: (target) => target.status !== 'Draft',
+        },
         {
           action: 'finalize',
           label: 'Finalize invoice',
@@ -178,6 +205,9 @@ export function OrdersClient() {
             Billing documents generated from confirmed Shop POs
           </p>
         </div>
+        {mode === 'ModeB' && (
+          <Button onClick={() => setCreateOpen(true)}>Create Invoice</Button>
+        )}
       </div>
 
       <DataTable
@@ -212,6 +242,12 @@ export function OrdersClient() {
         invoices={paymentInvoice ? [paymentInvoice] : []}
         defaultInvoiceId={paymentInvoice?.id}
       />
+
+      <CreateInvoiceDialog
+        open={createOpen}
+        onClose={() => setCreateOpen(false)}
+        onSuccess={() => fetchData(page, pageSize)}
+      />
     </>
   )
 }

distribution_fe/app/(print)/invoices/[id]/print/page.tsx

@@ -0,0 +1,68 @@
+'use client'
+
+import { useEffect, useState } from 'react'
+import { useParams } from 'next/navigation'
+import { Button } from '@/components/ui/button'
+import {
+  Select,
+  SelectContent,
+  SelectItem,
+  SelectTrigger,
+  SelectValue,
+} from '@/components/ui/select'
+import { InvoiceTemplate, type InvoicePaper } from '@/components/invoice/invoice-template'
+import { useInvoiceDocument } from '@/components/invoice/use-invoice-document'
+
+// Browser page rule per paper size. Receipts are one continuous strip (auto height). Margin is 0 so the
+// browser has no margin area to print its own header/footer (page title, URL, date) into; the sheet pads itself.
+const PAGE_RULE: Record<InvoicePaper, string> = {
+  A4: '@page { size: A4; margin: 0; }',
+  '80mm': '@page { size: 80mm auto; margin: 0; }',
+  '58mm': '@page { size: 58mm auto; margin: 0; }',
+}
+
+// Standalone printable invoice (no dashboard chrome). Opened in a new tab after "Print".
+export default function InvoicePrintPage() {
+  const params = useParams<{ id: string }>()
+  const { invoice, payments, customer, error } = useInvoiceDocument(params.id)
+  const [paper, setPaper] = useState<InvoicePaper>('A4')
+
+  // Open the browser print dialog once, when the invoice first appears.
+  useEffect(() => {
+    if (!invoice) return
+    const t = setTimeout(() => window.print(), 600)
+    return () => clearTimeout(t)
+  }, [invoice])
+
+  if (error) return <p className="p-8 text-sm text-destructive">Failed to load invoice: {error}</p>
+  if (!invoice) return <p className="p-8 text-sm text-muted-foreground">Loading invoice…</p>
+
+  return (
+    <div className="mx-auto max-w-4xl p-6 print:max-w-none print:p-0">
+      <style>{`${PAGE_RULE[paper]} @media print { html, body { background: #fff !important; } }`}</style>
+
+      <div className="mb-4 flex items-center justify-end gap-2 print:hidden">
+        <div className="w-32">
+          <Select value={paper} onValueChange={(v) => setPaper((v as InvoicePaper) ?? 'A4')}>
+            <SelectTrigger><SelectValue placeholder="Paper size" /></SelectTrigger>
+            <SelectContent>
+              <SelectItem value="A4">A4</SelectItem>
+              <SelectItem value="80mm">80mm receipt</SelectItem>
+              <SelectItem value="58mm">58mm receipt</SelectItem>
+            </SelectContent>
+          </Select>
+        </div>
+        <Button type="button" variant="outline" onClick={() => window.close()}>Close</Button>
+        <Button type="button" onClick={() => window.print()}>Print</Button>
+      </div>
+
+      <InvoiceTemplate
+        invoice={invoice}
+        payments={payments}
+        customer={customer}
+        paper={paper}
+        showAgentEdits={invoice.status !== 'Finalized'}
+      />
+    </div>
+  )
+}

distribution_fe/components/invoice/invoice-format.ts

@@ -0,0 +1,19 @@
+// Shared number/date formatting for printed invoices.
+
+/** `Rs. 12,450.00` — thousands separator, exactly 2 decimals. */
+export const fmtMoney = (n: number) =>
+  `Rs. ${n.toLocaleString('en-US', { minimumFractionDigits: 2, maximumFractionDigits: 2 })}`
+
+/** Quantity: up to 3 decimals, trailing zeros dropped. */
+export const fmtQty = (n: number) => n.toLocaleString('en-US', { maximumFractionDigits: 3 })
+
+/** `dd/MM/yyyy` */
+export function fmtDate(v: string | null | undefined) {
+  if (!v) return '—'
+  const d = new Date(v)
+  const dd = String(d.getDate()).padStart(2, '0')
+  const mm = String(d.getMonth() + 1).padStart(2, '0')
+  return `${dd}/${mm}/${d.getFullYear()}`
+}
+
+export const invoiceNo = (id: string) => `INV-${id.substring(0, 8).toUpperCase()}`

distribution_fe/components/invoice/invoice-template.tsx

@@ -0,0 +1,304 @@
+import type { ReactNode } from 'react'
+import { cn } from '@/lib/utils'
+import type { InvoiceItemResponse, InvoiceResponse, PaymentResponse } from '@/types/api'
+import { fmtDate, fmtMoney, fmtQty, invoiceNo } from './invoice-format'
+
+export type InvoicePaper = 'A4' | '80mm' | '58mm'
+
+export interface InvoiceCustomer {
+  address?: string | null
+  phone?: string | null
+}
+
+interface InvoiceTemplateProps {
+  invoice: InvoiceResponse
+  payments?: PaymentResponse[]
+  customer?: InvoiceCustomer
+  paper?: InvoicePaper
+  // Draft-editor hooks (A4 only): inputs in the qty / price cells, a per-row action, and an extra table row.
+  renderQuantity?: (item: InvoiceItemResponse) => ReactNode
+  renderUnitPrice?: (item: InvoiceItemResponse) => ReactNode
+  renderActions?: (item: InvoiceItemResponse) => ReactNode
+  footerRow?: ReactNode
+  // Blank lines for the agent's handwritten edits on the paper copy.
+  showAgentEdits?: boolean
+  className?: string
+}
+
+// Soft slate palette: light rules, muted section headings.
+const RULE = '#cbd5e1'
+const HEADING = '#64748b'
+
+const statusLabel = (invoice: InvoiceResponse) =>
+  invoice.status === 'Finalized' ? null : invoice.status.toUpperCase()
+
+// Removed lines stay on the document (struck through) but are excluded from every total.
+function totals(invoice: InvoiceResponse, payments: PaymentResponse[]) {
+  const total = invoice.items.filter((i) => !i.isRemoved).reduce((s, i) => s + i.quantity * i.unitPrice, 0)
+  const paid = payments.reduce((s, p) => s + p.amount, 0)
+  return { total, paid, balance: total - paid }
+}
+
+export function InvoiceTemplate({ paper = 'A4', ...props }: InvoiceTemplateProps) {
+  return paper === 'A4' ? <A4Sheet {...props} /> : <ReceiptSheet {...props} paper={paper} />
+}
+
+// ─── A4 ───────────────────────────────────────────────────────────────────────
+
+function A4Sheet({
+  invoice,
+  payments = [],
+  customer,
+  renderQuantity,
+  renderUnitPrice,
+  renderActions,
+  footerRow,
+  showAgentEdits,
+  className,
+}: Omit<InvoiceTemplateProps, 'paper'>) {
+  const { total, paid, balance } = totals(invoice, payments)
+  const status = statusLabel(invoice)
+  const hasRemoved = invoice.items.some((i) => i.isRemoved)
+
+  return (
+    <div
+      className={cn(
+        'invoice-sheet relative mx-auto w-full max-w-[210mm] rounded-lg border bg-white p-10 text-sm leading-relaxed text-neutral-900 shadow-sm',
+        'print:max-w-none print:rounded-none print:border-0 print:p-[14mm] print:shadow-none',
+        className,
+      )}
+    >
+      {/* Header */}
+      <div className="flex items-start justify-between gap-6 border-b pb-5" style={{ borderColor: RULE }}>
+        <h2 className="text-4xl font-bold tracking-wide">INVOICE</h2>
+        <dl className="grid grid-cols-[auto_auto] gap-x-6 gap-y-1 text-right text-sm">
+          <dt className="text-neutral-500">Invoice No.</dt>
+          <dd className="font-mono font-semibold">{invoiceNo(invoice.id)}</dd>
+          <dt className="text-neutral-500">Invoice Date</dt>
+          <dd>{fmtDate(invoice.createdAt)}</dd>
+          <dt className="text-neutral-500">PO Ref.</dt>
+          <dd className="font-mono">{invoice.shopPOId.substring(0, 8).toUpperCase()}</dd>
+          {status && (
+            <>
+              <dt className="text-neutral-500">Status</dt>
+              <dd className="font-semibold" style={{ color: HEADING }}>{status}</dd>
+            </>
+          )}
+        </dl>
+      </div>
+
+      {/* Bill to */}
+      <div className="mt-6">
+        <h3 className="mb-1 border-b pb-1 text-xs font-semibold uppercase tracking-widest" style={{ borderColor: RULE, color: HEADING }}>
+          Bill To
+        </h3>
+        <p className="text-base font-semibold">{invoice.storeName}</p>
+        {customer?.address && <p className="text-neutral-600">{customer.address}</p>}
+        {customer?.phone && <p className="text-neutral-600">{customer.phone}</p>}
+      </div>
+
+      {/* Items */}
+      <div className="mt-6">
+        <h3 className="mb-2 border-b pb-1 text-xs font-semibold uppercase tracking-widest" style={{ borderColor: RULE, color: HEADING }}>
+          Item Details
+        </h3>
+        <table className="w-full border-collapse">
+          <thead>
+            <tr className="border-b border-neutral-300 text-xs uppercase tracking-wide text-neutral-500">
+              <th className="px-2 py-2 text-left font-medium">Item</th>
+              <th className="w-24 px-2 py-2 text-right font-medium">Qty</th>
+              <th className="w-36 px-2 py-2 text-right font-medium">Unit Price</th>
+              <th className="w-40 px-2 py-2 text-right font-medium">Amount</th>
+              {renderActions && <th className="w-24 px-2 py-2 print:hidden" />}
+            </tr>
+          </thead>
+          <tbody>
+            {invoice.items.length === 0 && !footerRow ? (
+              <tr>
+                <td colSpan={4} className="px-2 py-6 text-center text-neutral-500">No items.</td>
+              </tr>
+            ) : (
+              invoice.items.map((item) => (
+                <tr
+                  key={item.id}
+                  className={cn('break-inside-avoid border-b border-neutral-200', item.isRemoved && 'text-neutral-400 line-through')}
+                >
+                  <td className="px-2 py-2.5">{item.itemName}</td>
+                  <td className="px-2 py-2.5 text-right">
+                    {renderQuantity && !item.isRemoved ? renderQuantity(item) : fmtQty(item.quantity)}
+                  </td>
+                  <td className="px-2 py-2.5 text-right">
+                    {renderUnitPrice && !item.isRemoved ? renderUnitPrice(item) : fmtMoney(item.unitPrice)}
+                  </td>
+                  <td className="px-2 py-2.5 text-right font-medium">{fmtMoney(item.quantity * item.unitPrice)}</td>
+                  {renderActions && <td className="px-2 py-2.5 text-right no-underline print:hidden">{renderActions(item)}</td>}
+                </tr>
+              ))
+            )}
+            {footerRow}
+          </tbody>
+        </table>
+        {hasRemoved && (
+          <p className="mt-2 text-xs text-neutral-500">Struck-through lines were removed and are not charged.</p>
+        )}
+      </div>
+
+      {/* Notes + totals */}
+      <div className="mt-6 grid grid-cols-[1fr_auto] gap-10">
+        <div>
+          {showAgentEdits && (
+            <>
+              <h3 className="mb-1 border-b pb-1 text-xs font-semibold uppercase tracking-widest" style={{ borderColor: RULE, color: HEADING }}>
+                Notes / Agent Edits
+              </h3>
+              {[0, 1, 2, 3].map((n) => (
+                <div key={n} className="h-7 border-b border-dotted border-neutral-400" />
+              ))}
+            </>
+          )}
+        </div>
+        <dl className="w-72 break-inside-avoid text-sm">
+          <div className="flex justify-between border-b py-1.5">
+            <dt className="text-neutral-500">Subtotal</dt>
+            <dd>{fmtMoney(total)}</dd>
+          </div>
+          <div className="flex justify-between border-y py-2 text-base font-bold" style={{ borderColor: RULE }}>
+            <dt>Total</dt>
+            <dd>{fmtMoney(total)}</dd>
+          </div>
+          {paid > 0 && (
+            <>
+              <div className="flex justify-between py-1.5">
+                <dt className="text-neutral-500">Paid</dt>
+                <dd>{fmtMoney(paid)}</dd>
+              </div>
+              <div className="flex justify-between border-t py-1.5 font-semibold">
+                <dt>Balance Due</dt>
+                <dd>{fmtMoney(balance)}</dd>
+              </div>
+            </>
+          )}
+        </dl>
+      </div>
+
+      {/* Payments */}
+      <div className="mt-6 break-inside-avoid">
+        <h3 className="mb-1 border-b pb-1 text-xs font-semibold uppercase tracking-widest" style={{ borderColor: RULE, color: HEADING }}>
+          Payments
+        </h3>
+        {payments.length === 0 ? (
+          <p className="text-neutral-500">No payment recorded yet.</p>
+        ) : (
+          <table className="w-full text-sm">
+            <tbody>
+              {payments.map((p) => (
+                <tr key={p.id} className="border-b border-neutral-100">
+                  <td className="w-28 py-1">{fmtDate(p.collectedAt)}</td>
+                  <td className="py-1">
+                    {p.method}
+                    {p.chequeNumber && <span className="text-neutral-500"> · Cheque {p.chequeNumber}</span>}
+                  </td>
+                  <td className="py-1 text-right font-medium">{fmtMoney(p.amount)}</td>
+                </tr>
+              ))}
+            </tbody>
+          </table>
+        )}
+      </div>
+
+      {/* Signatures */}
+      <div className="mt-14 grid grid-cols-2 gap-16 text-xs text-neutral-600">
+        <div className="border-t border-neutral-400 pt-1">Authorised by</div>
+        <div className="border-t border-neutral-400 pt-1">Received by (customer signature)</div>
+      </div>
+    </div>
+  )
+}
+
+// ─── 80mm / 58mm thermal receipt ──────────────────────────────────────────────
+
+function ReceiptSheet({
+  invoice,
+  payments = [],
+  customer,
+  paper,
+  showAgentEdits,
+  className,
+}: Omit<InvoiceTemplateProps, 'paper'> & { paper: Exclude<InvoicePaper, 'A4'> }) {
+  const { total, paid, balance } = totals(invoice, payments)
+  const status = statusLabel(invoice)
+  const narrow = paper === '58mm'
+  const rule = <div className="my-2 border-t border-dashed border-black" />
+  const num = (n: number) => n.toLocaleString('en-US', { minimumFractionDigits: 2, maximumFractionDigits: 2 })
+
+  return (
+    <div
+      className={cn(
+        'invoice-sheet mx-auto bg-white font-mono text-black shadow-sm print:shadow-none',
+        narrow ? 'w-[58mm] px-[4mm] py-[2.5mm] text-[9.5px]' : 'w-[80mm] px-[5mm] py-[4mm] text-[11px]',
+        className,
+      )}
+    >
+      <div className="text-center">
+        <p className="text-base font-bold tracking-widest">INVOICE</p>
+        {status && <p className="font-bold">*** {status} ***</p>}
+      </div>
+      {rule}
+      <div className="space-y-0.5">
+        <p>No: {invoiceNo(invoice.id)}</p>
+        <p>Date: {fmtDate(invoice.createdAt)}</p>
+        <p>Customer: {invoice.storeName}</p>
+        {customer?.phone && <p>Phone: {customer.phone}</p>}
+      </div>
+      {rule}
+      <div className="space-y-1.5">
+        {invoice.items.map((i) => (
+          <div key={i.id} className={cn(i.isRemoved && 'line-through opacity-60')}>
+            <p>{i.itemName}</p>
+            <p className="flex justify-between">
+              <span>{fmtQty(i.quantity)} x {num(i.unitPrice)}</span>
+              <span>{num(i.quantity * i.unitPrice)}</span>
+            </p>
+          </div>
+        ))}
+      </div>
+      {rule}
+      <p className="flex justify-between">
+        <span>Subtotal</span>
+        <span>{fmtMoney(total)}</span>
+      </p>
+      <div className="my-1 border-y-2 border-black py-1 text-sm font-bold">
+        <p className="flex justify-between">
+          <span>TOTAL</span>
+          <span>{fmtMoney(total)}</span>
+        </p>
+      </div>
+      {paid > 0 && (
+        <>
+          <p className="flex justify-between"><span>Paid</span><span>{fmtMoney(paid)}</span></p>
+          <p className="flex justify-between font-bold"><span>Balance</span><span>{fmtMoney(balance)}</span></p>
+        </>
+      )}
+      {payments.length > 0 && (
+        <>
+          {rule}
+          {payments.map((p) => (
+            <p key={p.id} className="flex justify-between">
+              <span>{fmtDate(p.collectedAt)} {p.method}</span>
+              <span>{num(p.amount)}</span>
+            </p>
+          ))}
+        </>
+      )}
+      {showAgentEdits && (
+        <>
+          {rule}
+          <p>Notes:</p>
+          {[0, 1, 2].map((n) => <div key={n} className="h-5 border-b border-dotted border-black" />)}
+        </>
+      )}
+      {rule}
+      <p className="text-center">Thank you!</p>
+    </div>
+  )
+}

distribution_fe/components/invoice/use-invoice-document.ts

@@ -0,0 +1,41 @@
+'use client'
+
+import { useEffect, useState } from 'react'
+import { invoices as invoicesApi, payments as paymentsApi, shopPos as shopPosApi, getApiError } from '@/lib/api/index'
+import type { PaymentResponse, InvoiceResponse } from '@/types/api'
+import type { InvoiceCustomer } from './invoice-template'
+
+// Loads everything the printed invoice needs. Only the invoice is required — if payments or the
+// customer details fail to load, that block is simply left out.
+export function useInvoiceDocument(invoiceId: string | null | undefined, enabled = true) {
+  const [invoice, setInvoice] = useState<InvoiceResponse | null>(null)
+  const [payments, setPayments] = useState<PaymentResponse[]>([])
+  const [customer, setCustomer] = useState<InvoiceCustomer | undefined>()
+  const [error, setError] = useState<string | null>(null)
+
+  useEffect(() => {
+    if (!enabled || !invoiceId) return
+    let cancelled = false
+    setInvoice(null)
+    setPayments([])
+    setCustomer(undefined)
+    setError(null)
+
+    invoicesApi.get(invoiceId)
+      .then((inv) => {
+        if (cancelled) return
+        setInvoice(inv)
+        paymentsApi.listByInvoice(inv.id).then((p) => !cancelled && setPayments(p)).catch(() => {})
+        shopPosApi.get(inv.shopPOId)
+          .then((po) => !cancelled && setCustomer({ address: po.storeAddress, phone: po.storeContactNumber }))
+          .catch(() => {})
+      })
+      .catch((err) => !cancelled && setError(getApiError(err)))
+
+    return () => {
+      cancelled = true
+    }
+  }, [invoiceId, enabled])
+
+  return { invoice, payments, customer, error }
+}

distribution_fe/components/layout/notification-bell.tsx

@@ -0,0 +1,122 @@
+'use client'
+
+import Link from 'next/link'
+import { useState } from 'react'
+import { Bell } from 'lucide-react'
+import { Button } from '@/components/ui/button'
+import { Popover, PopoverContent, PopoverTrigger } from '@/components/ui/popover'
+import { useNotifications } from '@/contexts/notification-context'
+import { cn } from '@/lib/utils'
+import type { NotificationResponse, NotificationSeverity } from '@/types/notifications'
+
+const SEVERITY_DOT: Record<NotificationSeverity, string> = {
+  Info: 'bg-sky-500',
+  Success: 'bg-emerald-500',
+  Warning: 'bg-amber-500',
+  Critical: 'bg-red-500',
+}
+
+export function timeAgo(iso: string): string {
+  const seconds = Math.max(0, Math.floor((Date.now() - new Date(iso).getTime()) / 1000))
+  if (seconds < 60) return 'just now'
+  const minutes = Math.floor(seconds / 60)
+  if (minutes < 60) return `${minutes}m ago`
+  const hours = Math.floor(minutes / 60)
+  if (hours < 24) return `${hours}h ago`
+  const days = Math.floor(hours / 24)
+  if (days < 7) return `${days}d ago`
+  return new Date(iso).toLocaleDateString()
+}
+
+export function NotificationRow({
+  notification: n,
+  onOpen,
+}: {
+  notification: NotificationResponse
+  onOpen: (n: NotificationResponse) => void
+}) {
+  return (
+    <button
+      type="button"
+      onClick={() => onOpen(n)}
+      className={cn(
+        'flex w-full items-start gap-3 px-4 py-3 text-left transition-colors hover:bg-muted/60',
+        !n.isRead && 'bg-muted/30'
+      )}
+    >
+      <span className={cn('mt-1.5 size-2 shrink-0 rounded-full', n.isRead ? 'bg-transparent' : SEVERITY_DOT[n.severity])} />
+      <span className="flex min-w-0 flex-1 flex-col gap-0.5">
+        <span className={cn('truncate text-sm', n.isRead ? 'text-foreground' : 'font-medium text-foreground')}>
+          {n.title}
+        </span>
+        <span className="line-clamp-2 text-xs text-muted-foreground">{n.message}</span>
+        <span className="text-[11px] text-muted-foreground/70">{timeAgo(n.createdAt)}</span>
+      </span>
+    </button>
+  )
+}
+
+export function NotificationBell() {
+  const { recent, unreadCount, open, markAllRead } = useNotifications()
+  const [isOpen, setIsOpen] = useState(false)
+
+  return (
+    <Popover open={isOpen} onOpenChange={setIsOpen}>
+      <PopoverTrigger
+        render={
+          <Button
+            variant="ghost"
+            size="icon"
+            className="relative h-8 w-8 text-muted-foreground hover:text-foreground"
+            aria-label={unreadCount > 0 ? `Notifications (${unreadCount} unread)` : 'Notifications'}
+          />
+        }
+      >
+        <Bell size={16} />
+        {unreadCount > 0 && (
+          <span className="absolute -top-0.5 -right-0.5 flex h-4 min-w-4 items-center justify-center rounded-full bg-red-500 px-1 text-[10px] font-semibold leading-none text-white">
+            {unreadCount > 99 ? '99+' : unreadCount}
+          </span>
+        )}
+      </PopoverTrigger>
+
+      <PopoverContent>
+        <div className="flex items-center justify-between border-b border-border px-4 py-3">
+          <span className="text-sm font-medium">Notifications</span>
+          <Button
+            variant="ghost"
+            size="xs"
+            disabled={unreadCount === 0}
+            onClick={() => { void markAllRead() }}
+          >
+            Mark all read
+          </Button>
+        </div>
+
+        <div className="max-h-96 divide-y divide-border overflow-y-auto">
+          {recent.length === 0 ? (
+            <p className="px-4 py-10 text-center text-sm text-muted-foreground">You&apos;re all caught up.</p>
+          ) : (
+            recent.map(n => (
+              <NotificationRow
+                key={n.id}
+                notification={n}
+                onOpen={item => { setIsOpen(false); void open(item) }}
+              />
+            ))
+          )}
+        </div>
+
+        <div className="border-t border-border p-2">
+          <Link
+            href="/notifications"
+            onClick={() => setIsOpen(false)}
+            className="block rounded-xl px-3 py-2 text-center text-sm text-muted-foreground transition-colors hover:bg-muted hover:text-foreground"
+          >
+            View all
+          </Link>
+        </div>
+      </PopoverContent>
+    </Popover>
+  )
+}

distribution_fe/components/ui/popover.tsx

@@ -0,0 +1,50 @@
+"use client"
+
+import * as React from "react"
+import { Popover as PopoverPrimitive } from "@base-ui/react/popover"
+
+import { cn } from "@/lib/utils"
+
+function Popover({ ...props }: PopoverPrimitive.Root.Props) {
+  return <PopoverPrimitive.Root data-slot="popover" {...props} />
+}
+
+function PopoverTrigger({ ...props }: PopoverPrimitive.Trigger.Props) {
+  return <PopoverPrimitive.Trigger data-slot="popover-trigger" {...props} />
+}
+
+function PopoverContent({
+  align = "end",
+  alignOffset = 0,
+  side = "bottom",
+  sideOffset = 6,
+  className,
+  ...props
+}: PopoverPrimitive.Popup.Props &
+  Pick<
+    PopoverPrimitive.Positioner.Props,
+    "align" | "alignOffset" | "side" | "sideOffset"
+  >) {
+  return (
+    <PopoverPrimitive.Portal>
+      <PopoverPrimitive.Positioner
+        className="isolate z-50 outline-none"
+        align={align}
+        alignOffset={alignOffset}
+        side={side}
+        sideOffset={sideOffset}
+      >
+        <PopoverPrimitive.Popup
+          data-slot="popover-content"
+          className={cn(
+            "z-50 w-[min(24rem,calc(100vw-2rem))] origin-(--transform-origin) rounded-2xl bg-popover text-popover-foreground shadow-lg ring-1 ring-foreground/5 duration-100 outline-none dark:ring-foreground/10 data-open:animate-in data-open:fade-in-0 data-open:zoom-in-95 data-closed:animate-out data-closed:fade-out-0 data-closed:zoom-out-95",
+            className
+          )}
+          {...props}
+        />
+      </PopoverPrimitive.Positioner>
+    </PopoverPrimitive.Portal>
+  )
+}
+
+export { Popover, PopoverTrigger, PopoverContent }

distribution_fe/contexts/notification-context.tsx

@@ -0,0 +1,135 @@
+'use client'
+
+import { createContext, useContext, useState, useEffect, useCallback, useRef, type ReactNode } from 'react'
+import { useRouter } from 'next/navigation'
+import { HubConnectionBuilder, LogLevel } from '@microsoft/signalr'
+import { useAuth } from '@/contexts/auth-context'
+import { notifications, NOTIFICATION_HUB_URL } from '@/lib/api/notifications'
+import { toast } from '@/components/ui/toast'
+import type { NotificationResponse, NotificationSeverity } from '@/types/notifications'
+
+const RECENT_COUNT = 20
+
+const TOAST_TYPE: Record<NotificationSeverity, 'info' | 'success' | 'warning' | 'error'> = {
+  Info: 'info',
+  Success: 'success',
+  Warning: 'warning',
+  Critical: 'error',
+}
+
+interface NotificationContextValue {
+  /** The most recent notifications, newest first (what the bell popover shows). */
+  recent: NotificationResponse[]
+  unreadCount: number
+  /** Marks the notification read (if needed) and navigates to its link. */
+  open: (n: NotificationResponse) => Promise<void>
+  markAllRead: () => Promise<void>
+  /** Re-fetches the recent list and the unread count. */
+  refresh: () => Promise<void>
+}
+
+const NotificationContext = createContext<NotificationContextValue | null>(null)
+
+export function NotificationProvider({ children }: { children: ReactNode }) {
+  const router = useRouter()
+  const { user } = useAuth()
+  const [recent, setRecent] = useState<NotificationResponse[]>([])
+  const [unreadCount, setUnreadCount] = useState(0)
+
+  const refresh = useCallback(async () => {
+    try {
+      const [page, count] = await Promise.all([
+        notifications.list({ page: 1, pageSize: RECENT_COUNT }),
+        notifications.unreadCount(),
+      ])
+      setRecent(page.items)
+      setUnreadCount(count)
+    } catch {
+      // The bell is a convenience; never break the page if it can't load.
+    }
+  }, [])
+
+  const markRead = useCallback(async (n: NotificationResponse) => {
+    if (n.isRead) return
+    setRecent(prev => prev.map(x => (x.id === n.id ? { ...x, isRead: true } : x)))
+    setUnreadCount(c => Math.max(0, c - 1))
+    try {
+      await notifications.markRead(n.id)
+    } catch {
+      await refresh()
+    }
+  }, [refresh])
+
+  const open = useCallback(async (n: NotificationResponse) => {
+    await markRead(n)
+    if (n.link) router.push(n.link)
+  }, [markRead, router])
+
+  const markAllRead = useCallback(async () => {
+    setRecent(prev => prev.map(x => ({ ...x, isRead: true })))
+    setUnreadCount(0)
+    try {
+      await notifications.markAllRead()
+    } catch {
+      await refresh()
+    }
+  }, [refresh])
+
+  // Keep the latest `open` for the long-lived socket handler without reconnecting.
+  const openRef = useRef(open)
+  useEffect(() => { openRef.current = open }, [open])
+
+  useEffect(() => {
+    if (!user) return
+
+    void refresh()
+
+    const connection = new HubConnectionBuilder()
+      .withUrl(NOTIFICATION_HUB_URL, { withCredentials: true })
+      .withAutomaticReconnect()
+      .configureLogging(LogLevel.Warning)
+      .build()
+
+    connection.on('notification', (n: NotificationResponse) => {
+      setRecent(prev => [n, ...prev.filter(x => x.id !== n.id)].slice(0, RECENT_COUNT))
+      setUnreadCount(c => c + 1)
+      toast.add({
+        title: n.title,
+        description: n.message,
+        type: TOAST_TYPE[n.severity] ?? 'info',
+        actionProps: n.link
+          ? { children: 'Open', onClick: () => { void openRef.current(n) } }
+          : undefined,
+      })
+    })
+
+    // Anything pushed while the socket was down is only in the inbox — catch up.
+    connection.onreconnected(() => { void refresh() })
+
+    connection.start().catch(() => {
+      // Initial connect failed (offline / API down); the inbox endpoints still work.
+    })
+
+    return () => { void connection.stop() }
+  }, [user, refresh])
+
+  return (
+    <NotificationContext.Provider
+      value={{
+        recent: user ? recent : [],
+        unreadCount: user ? unreadCount : 0,
+        open,
+        markAllRead,
+        refresh,
+      }}
+    >
+      {children}
+    </NotificationContext.Provider>
+  )
+}
+
+export function useNotifications(): NotificationContextValue {
+  const ctx = useContext(NotificationContext)
+  if (!ctx) throw new Error('useNotifications must be used inside NotificationProvider')
+  return ctx
+}

distribution_fe/lib/api/index.ts

@@ -11,11 +11,12 @@ export { stock } from './stock'
 export { productReports, stockReports, dashboardReports } from './reports'
 export { shopPos, invoices, payments } from './sales'
 export { saleReturns, claims, supplierClaims } from './returns-claims'
-export { sysConfig, ITEM_TRACKING_KEYS, GRN_TAX_KEYS, grnTaxSettings, DEFAULT_GRN_TAX_SETTINGS } from './sys-config'
+export { sysConfig, ITEM_TRACKING_KEYS, GRN_TAX_KEYS, grnTaxSettings, DEFAULT_GRN_TAX_SETTINGS, invoiceCreationMode, INVOICE_CREATION_MODE_KEY, DEFAULT_INVOICE_CREATION_MODE } from './sys-config'
 export { bankAccounts } from './bank-accounts'
 export { chequeBooks, chequePages } from './cheques'
 export { receivedCheques } from './received-cheques'
 export { supplierPayments } from './supplier-payments'
+export { notifications } from './notifications'
 export { getPaginatedItems } from './paginated'
 
 export type { PageParams } from './master'

distribution_fe/lib/api/notifications.ts

@@ -0,0 +1,24 @@
+import { api } from '@/lib/api'
+import type { NotificationPage } from '@/types/notifications'
+
+export const notifications = {
+  list: (params?: { unreadOnly?: boolean; page?: number; pageSize?: number }) =>
+    api.get<NotificationPage>('/notifications', { params }).then(r => r.data),
+
+  unreadCount: () =>
+    api.get<{ count: number }>('/notifications/unread-count').then(r => r.data.count),
+
+  markRead: (id: string) =>
+    api.patch(`/notifications/${id}/read`).then(() => undefined),
+
+  markAllRead: () =>
+    api.patch('/notifications/read-all').then(() => undefined),
+
+  remove: (id: string) =>
+    api.delete(`/notifications/${id}`).then(() => undefined),
+}
+
+/** SignalR hub URL — the API base URL without its trailing /api. */
+export const NOTIFICATION_HUB_URL =
+  (process.env.NEXT_PUBLIC_API_URL ?? 'http://localhost:5089/api').replace(/\/api\/?$/, '') +
+  '/hubs/notifications'

distribution_fe/lib/api/reports.ts

@@ -163,6 +163,7 @@ export const productReports = {
 export interface SalesKpis {
   grossSales: number
   returnValue: number
+  discounts: number
   netSales: number
   orders: number
   averageOrderValue: number
@@ -170,11 +171,19 @@ export interface SalesKpis {
   grossProfitMarginPercent: number | null
 }
 
+export interface CashKpis {
+  collected: number
+  outstanding: number
+  overdue: number
+  collectionRatePercent: number | null
+}
+
 export interface DashboardSalesSummary {
   from: string
   to: string
   granularity: 'day' | 'month'
   kpis: { current: SalesKpis; previous: SalesKpis; previousFrom: string; previousTo: string }
+  cash: { current: CashKpis; previous: CashKpis }
   trend: Array<{ period: string; sales: number; returns: number }>
   byCategory: Array<{ id: string | null; name: string; amount: number }>
   byRegion: Array<{ id: string | null; name: string; amount: number }>

distribution_fe/lib/api/sales.ts

@@ -4,6 +4,7 @@ import type {
   ShopPOResponse,
   InvoiceResponse,
   InvoiceStatus,
+  InvoiceVersionResponse,
   PaymentStatus,
   PaymentResponse,
   PaymentMethod,
@@ -48,6 +49,9 @@ export const shopPos = {
   get: (id: string) =>
     api.get<ShopPOResponse>(`/shop-pos/${id}`).then(r => r.data),
 
+  confirmedWithoutInvoice: (params?: { agentId?: string; routeId?: string; shopId?: string }) =>
+    api.get<ShopPOResponse[]>('/shop-pos/confirmed-without-invoice', { params }).then(r => r.data),
+
   create: (body: CreateShopPOBody) =>
     api.post<ShopPOResponse>('/shop-pos', body).then(r => r.data),
 
@@ -84,11 +88,20 @@ export const invoices = {
   get: (id: string) =>
     api.get<InvoiceResponse>(`/invoices/${id}`).then(r => r.data),
 
+  create: (shopPOId: string, createdByUserId?: string | null) =>
+    api.post<InvoiceResponse>('/invoices', { shopPOId, createdByUserId }).then(r => r.data),
+
   print: (id: string, printedByUserId?: string | null) =>
     api.post<InvoiceResponse>(`/invoices/${id}/print`, { printedByUserId }).then(r => r.data),
 
-  finalize: (id: string, finalizedByUserId?: string | null) =>
-    api.post<InvoiceResponse>(`/invoices/${id}/finalize`, { finalizedByUserId }).then(r => r.data),
+  finalize: (id: string, finalizedByUserId?: string | null, adjustments?: { invoiceItemId: string; adjustedQuantity: number; isRemoved?: boolean }[]) =>
+    api.post<InvoiceResponse>(`/invoices/${id}/finalize`, { finalizedByUserId, adjustments }).then(r => r.data),
+
+  updateItems: (id: string, items: { invoiceItemId?: string; itemId?: string; quantity: number; unitPrice?: number | null; isRemoved?: boolean }[], editedByUserId?: string | null) =>
+    api.put<InvoiceResponse>(`/invoices/${id}/items`, { items, editedByUserId }).then(r => r.data),
+
+  versions: (id: string) =>
+    api.get<InvoiceVersionResponse[]>(`/invoices/${id}/versions`).then(r => r.data),
 }
 
 // ─── Payments ─────────────────────────────────────────────────────────────────

distribution_fe/lib/api/sys-config.ts

@@ -72,3 +72,19 @@ export const grnTaxSettings = {
       .getAll()
       .then(all => parseGrnTaxSettings(Object.fromEntries(all.map(c => [c.key, c.value])))),
 }
+
+// ─── Invoice creation mode (must match Distribution.Features.SysConfig.SysConfigService) ─────
+
+export const INVOICE_CREATION_MODE_KEY = 'InvoiceCreationMode'
+
+export type InvoiceCreationMode = 'ModeA' | 'ModeB'
+
+export const DEFAULT_INVOICE_CREATION_MODE: InvoiceCreationMode = 'ModeB'
+
+export const invoiceCreationMode = {
+  get: () =>
+    api.get<{ mode: InvoiceCreationMode }>('/sys-config/invoice-creation-mode').then(r => r.data.mode),
+
+  set: (mode: InvoiceCreationMode) =>
+    api.put('/sys-config/invoice-creation-mode', { mode }).then(r => r.data),
+}

distribution_fe/package-lock.json

@@ -12,6 +12,7 @@
         "@hookform/resolvers": "^5.9.1",
         "@hugeicons/core-free-icons": "^4.3.0",
         "@hugeicons/react": "^1.1.10",
+        "@microsoft/signalr": "^10.0.11",
         "@types/leaflet": "^1.9.22",
         "axios": "^1.19.0",
         "class-variance-authority": "^0.7.1",
@@ -1763,6 +1764,28 @@
         "@jridgewell/sourcemap-codec": "^1.4.14"
       }
     },
+    "node_modules/@microsoft/signalr": {
+      "version": "10.0.11",
+      "resolved": "https://registry.npmjs.org/@microsoft/signalr/-/signalr-10.0.11.tgz",
+      "integrity": "sha512-FulOJ2EEtKvLQcswe/U7v8pzyXyk7Jua5xgWJPPwyQU/2Z9ORvKcVjyO75VvLsem+CJ1ORRexJ+7Bz1FCei2aw==",
+      "license": "MIT",
+      "dependencies": {
+        "abort-controller": "^3.0.0",
+        "eventsource": "^2.0.2",
+        "fetch-cookie": "^2.0.3",
+        "node-fetch": "^2.6.7",
+        "ws": "^7.5.10"
+      }
+    },
+    "node_modules/@microsoft/signalr/node_modules/eventsource": {
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/eventsource/-/eventsource-2.0.2.tgz",
+      "integrity": "sha512-IzUmBGPR3+oUG9dUeXynyNmf91/3zUSJg1lCktzKw47OXuhco54U3r9B7O4XX+Rb1Itm9OZ2b0RkTs10bICOxA==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=12.0.0"
+      }
+    },
     "node_modules/@modelcontextprotocol/sdk": {
       "version": "1.30.0",
       "resolved": "https://registry.npmjs.org/@modelcontextprotocol/sdk/-/sdk-1.30.0.tgz",
@@ -3251,6 +3274,18 @@
         "win32"
       ]
     },
+    "node_modules/abort-controller": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/abort-controller/-/abort-controller-3.0.0.tgz",
+      "integrity": "sha512-h8lQ8tacZYnR3vNQTgibj+tODHI5/+l06Au2Pcriv/Gmet0eaj4TwWH41sO9wnHDiQsEj19q0drzdWdeAHtweg==",
+      "license": "MIT",
+      "dependencies": {
+        "event-target-shim": "^5.0.0"
+      },
+      "engines": {
+        "node": ">=6.5"
+      }
+    },
     "node_modules/accepts": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/accepts/-/accepts-2.0.0.tgz",
@@ -5683,6 +5718,15 @@
         "node": ">= 0.6"
       }
     },
+    "node_modules/event-target-shim": {
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/event-target-shim/-/event-target-shim-5.0.1.tgz",
+      "integrity": "sha512-i/2XbnSz/uxRCU6+NdVJgKWDTM427+MqYbkQzD321DuCQJUqOuJKIA0IM2+W2xtYHdKOmZ4dR6fExsd4SXL+WQ==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=6"
+      }
+    },
     "node_modules/eventemitter3": {
       "version": "5.0.4",
       "resolved": "https://registry.npmjs.org/eventemitter3/-/eventemitter3-5.0.4.tgz",
@@ -5923,6 +5967,16 @@
         "reusify": "^1.0.4"
       }
     },
+    "node_modules/fetch-cookie": {
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/fetch-cookie/-/fetch-cookie-2.2.0.tgz",
+      "integrity": "sha512-h9AgfjURuCgA2+2ISl8GbavpUdR+WGAM2McW/ovn4tVccegp8ZqCKWSBR8uRdM8dDNlx5WdKRWxBYUwteLDCNQ==",
+      "license": "Unlicense",
+      "dependencies": {
+        "set-cookie-parser": "^2.4.8",
+        "tough-cookie": "^4.0.0"
+      }
+    },
     "node_modules/fflate": {
       "version": "0.8.3",
       "resolved": "https://registry.npmjs.org/fflate/-/fflate-0.8.3.tgz",
@@ -8426,6 +8480,26 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/node-fetch": {
+      "version": "2.7.0",
+      "resolved": "https://registry.npmjs.org/node-fetch/-/node-fetch-2.7.0.tgz",
+      "integrity": "sha512-c4FRfUm/dbcWZ7U+1Wq0AwCyFL+3nt2bEw05wfxSz+DWpWsitgmSgYmy2dQdWyKC1694ELPqMs/YzUSNozLt8A==",
+      "license": "MIT",
+      "dependencies": {
+        "whatwg-url": "^5.0.0"
+      },
+      "engines": {
+        "node": "4.x || >=6.0.0"
+      },
+      "peerDependencies": {
+        "encoding": "^0.1.0"
+      },
+      "peerDependenciesMeta": {
+        "encoding": {
+          "optional": true
+        }
+      }
+    },
     "node_modules/node-releases": {
       "version": "2.0.53",
       "resolved": "https://registry.npmjs.org/node-releases/-/node-releases-2.0.53.tgz",
@@ -9272,11 +9346,22 @@
         "node": ">=10"
       }
     },
+    "node_modules/psl": {
+      "version": "1.15.0",
+      "resolved": "https://registry.npmjs.org/psl/-/psl-1.15.0.tgz",
+      "integrity": "sha512-JZd3gMVBAVQkSs6HdNZo9Sdo0LNcQeMNP3CozBJb3JYC/QUYZTnKxP+f8oWRX4rHP5EurWxqAHTSwUCjlNKa1w==",
+      "license": "MIT",
+      "dependencies": {
+        "punycode": "^2.3.1"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/lupomontero"
+      }
+    },
     "node_modules/punycode": {
       "version": "2.3.1",
       "resolved": "https://registry.npmjs.org/punycode/-/punycode-2.3.1.tgz",
       "integrity": "sha512-vYt7UD1U9Wg6138shLtLOvdAu+8DsC/ilFtEVHcH+wydcSpNE20AfSOduf6MkRFahL5FY7X1oU7nKVZFtfq8Fg==",
-      "dev": true,
       "license": "MIT",
       "engines": {
         "node": ">=6"
@@ -9298,6 +9383,12 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/querystringify": {
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/querystringify/-/querystringify-2.2.0.tgz",
+      "integrity": "sha512-FIqgj2EUvTa7R50u0rGsyTftzjYmv/a3hO345bZNrqabNqjtgiDMgmo4mkUjd+nzU5oF3dClKqFIPUKybUyqoQ==",
+      "license": "MIT"
+    },
     "node_modules/queue-microtask": {
       "version": "1.2.3",
       "resolved": "https://registry.npmjs.org/queue-microtask/-/queue-microtask-1.2.3.tgz",
@@ -9651,6 +9742,12 @@
         "node": ">=0.10.0"
       }
     },
+    "node_modules/requires-port": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/requires-port/-/requires-port-1.0.0.tgz",
+      "integrity": "sha512-KigOCHcocU3XODJxsu8i/j8T9tzT4adHiecwORRQ0ZZFcp7ahwXuRU1m+yuO90C5ZUyGeGfocHDI14M3L3yDAQ==",
+      "license": "MIT"
+    },
     "node_modules/reselect": {
       "version": "5.3.0",
       "resolved": "https://registry.npmjs.org/reselect/-/reselect-5.3.0.tgz",
@@ -9971,6 +10068,12 @@
         "url": "https://opencollective.com/express"
       }
     },
+    "node_modules/set-cookie-parser": {
+      "version": "2.7.2",
+      "resolved": "https://registry.npmjs.org/set-cookie-parser/-/set-cookie-parser-2.7.2.tgz",
+      "integrity": "sha512-oeM1lpU/UvhTxw+g3cIfxXHyJRc/uidd3yK1P242gzHds0udQBYzs3y8j4gCCW+ZJ7ad0yctld8RYO+bdurlvw==",
+      "license": "MIT"
+    },
     "node_modules/set-function-length": {
       "version": "1.2.2",
       "resolved": "https://registry.npmjs.org/set-function-length/-/set-function-length-1.2.2.tgz",
@@ -10860,6 +10963,36 @@
         "node": ">=0.6"
       }
     },
+    "node_modules/tough-cookie": {
+      "version": "4.1.4",
+      "resolved": "https://registry.npmjs.org/tough-cookie/-/tough-cookie-4.1.4.tgz",
+      "integrity": "sha512-Loo5UUvLD9ScZ6jh8beX1T6sO1w2/MpCRpEP7V280GKMVUQ0Jzar2U3UJPsrdbziLEMMhu3Ujnq//rhiFuIeag==",
+      "license": "BSD-3-Clause",
+      "dependencies": {
+        "psl": "^1.1.33",
+        "punycode": "^2.1.1",
+        "universalify": "^0.2.0",
+        "url-parse": "^1.5.3"
+      },
+      "engines": {
+        "node": ">=6"
+      }
+    },
+    "node_modules/tough-cookie/node_modules/universalify": {
+      "version": "0.2.0",
+      "resolved": "https://registry.npmjs.org/universalify/-/universalify-0.2.0.tgz",
+      "integrity": "sha512-CJ1QgKmNg3CwvAv/kOFmtnEN05f0D/cn9QntgNOQlQF9dgvVTHj3t+8JPdjqawCHk7V/KA+fbUqzZ9XWhcqPUg==",
+      "license": "MIT",
+      "engines": {
+        "node": ">= 4.0.0"
+      }
+    },
+    "node_modules/tr46": {
+      "version": "0.0.3",
+      "resolved": "https://registry.npmjs.org/tr46/-/tr46-0.0.3.tgz",
+      "integrity": "sha512-N3WMsuqV66lT30CrXNbEjx4GEwlow3v6rr4mCcv6prnfwhS01rkgyFdjPNBYd9br7LpXV1+Emh01fHnq2Gdgrw==",
+      "license": "MIT"
+    },
     "node_modules/traverse": {
       "version": "0.3.10",
       "resolved": "https://registry.npmjs.org/traverse/-/traverse-0.3.10.tgz",
@@ -11316,6 +11449,16 @@
         "punycode": "^2.1.0"
       }
     },
+    "node_modules/url-parse": {
+      "version": "1.5.10",
+      "resolved": "https://registry.npmjs.org/url-parse/-/url-parse-1.5.10.tgz",
+      "integrity": "sha512-WypcfiRhfeUP9vvF0j6rw0J3hrWrw6iZv3+22h6iRMJ/8z1Tj6XfLP4DsUix5MhMPnXpiHDoKyoZ/bdCkwBCiQ==",
+      "license": "MIT",
+      "dependencies": {
+        "querystringify": "^2.1.1",
+        "requires-port": "^1.0.0"
+      }
+    },
     "node_modules/use-sync-external-store": {
       "version": "1.6.0",
       "resolved": "https://registry.npmjs.org/use-sync-external-store/-/use-sync-external-store-1.6.0.tgz",
@@ -11391,6 +11534,22 @@
         "d3-timer": "^3.0.1"
       }
     },
+    "node_modules/webidl-conversions": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/webidl-conversions/-/webidl-conversions-3.0.1.tgz",
+      "integrity": "sha512-2JAn3z8AR6rjK8Sm8orRC0h/bcl/DqL7tRPdGZ4I1CjdF+EaMLmYxBHyXuKL849eucPFhvBoxMsflfOb8kxaeQ==",
+      "license": "BSD-2-Clause"
+    },
+    "node_modules/whatwg-url": {
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/whatwg-url/-/whatwg-url-5.0.0.tgz",
+      "integrity": "sha512-saE57nupxk6v3HY35+jzBwYa0rKSy0XR8JSxZPwgLr7ys0IBzhGviA1/TUGJLmSVqs8pb9AnvICXEuOHLprYTw==",
+      "license": "MIT",
+      "dependencies": {
+        "tr46": "~0.0.3",
+        "webidl-conversions": "^3.0.0"
+      }
+    },
     "node_modules/which": {
       "version": "2.0.2",
       "resolved": "https://registry.npmjs.org/which/-/which-2.0.2.tgz",
@@ -11507,6 +11666,27 @@
       "integrity": "sha512-l4Sp/DRseor9wL6EvV2+TuQn63dMkPjZ/sp9XkghTEbV9KlPS1xUsZ3u7/IQO4wxtcFB4bgpQPRcR3QCvezPcQ==",
       "license": "ISC"
     },
+    "node_modules/ws": {
+      "version": "7.5.13",
+      "resolved": "https://registry.npmjs.org/ws/-/ws-7.5.13.tgz",
+      "integrity": "sha512-rsKI6xDBFVf4r/x8XyChGK04QR/XHroxs/jUcoWvtEZM8TPU/X/uIY9B1CsSzYws9ZJb/6bbBu7dPhFW00CAoA==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=8.3.0"
+      },
+      "peerDependencies": {
+        "bufferutil": "^4.0.1",
+        "utf-8-validate": "^5.0.2"
+      },
+      "peerDependenciesMeta": {
+        "bufferutil": {
+          "optional": true
+        },
+        "utf-8-validate": {
+          "optional": true
+        }
+      }
+    },
     "node_modules/wsl-utils": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/wsl-utils/-/wsl-utils-1.0.0.tgz",

distribution_fe/package.json

@@ -16,6 +16,7 @@
     "@hookform/resolvers": "^5.9.1",
     "@hugeicons/core-free-icons": "^4.3.0",
     "@hugeicons/react": "^1.1.10",
+    "@microsoft/signalr": "^10.0.11",
     "@types/leaflet": "^1.9.22",
     "axios": "^1.19.0",
     "class-variance-authority": "^0.7.1",

distribution_fe/types/api.ts

@@ -12,6 +12,7 @@ export type PurchaseOrderStatus =
   | 'Issued' | 'PartiallyReceived' | 'Received' | 'Closed' | 'Cancelled'
 export type ShopPOStatus = 'Pending' | 'PartiallyFulfilled' | 'Fulfilled' | 'Cancelled'
 export type InvoiceStatus = 'Draft' | 'Printed' | 'Finalized'
+export type InvoiceVersionStage = 'Created' | 'DraftEdited' | 'Printed' | 'Finalized'
 export type InvoiceCreationMode = 'ModeA' | 'ModeB'
 export type PaymentStatus = 'Pending' | 'PartiallyPaid' | 'Paid'
 export type PaymentMethod = 'Cash' | 'Cheque' | 'Credit'
@@ -1001,6 +1002,36 @@ export interface ShopPOResponse {
   cancelledByRole: string | null
 }
 
+export interface InvoiceItemResponse {
+  id: string
+  shopPOItemId: string | null
+  itemId: string
+  itemName: string
+  orderedQuantity: number | null
+  quantity: number
+  unitPrice: number
+  isRemoved: boolean
+}
+
+export interface InvoiceVersionItemResponse {
+  shopPOItemId: string | null
+  itemId: string
+  itemName: string
+  quantity: number
+  unitPrice: number
+  isRemoved: boolean
+}
+
+export interface InvoiceVersionResponse {
+  id: string
+  versionNumber: number
+  stage: InvoiceVersionStage
+  totalAmount: number
+  createdBy: string
+  createdAt: string
+  items: InvoiceVersionItemResponse[]
+}
+
 export interface InvoiceResponse {
   id: string
   shopPOId: string
@@ -1014,9 +1045,11 @@ export interface InvoiceResponse {
   finalizedAt: string | null
   finalizedBy: string | null
   totalAmount: number
+  discountAmount: number
   paidAmount: number
   isActive: boolean
   createdAt: string
+  items: InvoiceItemResponse[]
 }
 
 export interface OutstandingPaymentsResponse {

distribution_fe/types/notifications.ts

@@ -0,0 +1,23 @@
+export type NotificationSeverity = 'Info' | 'Success' | 'Warning' | 'Critical'
+
+export interface NotificationResponse {
+  /** The caller's own recipient row id — use it for read / delete. */
+  id: string
+  type: string
+  severity: NotificationSeverity
+  title: string
+  message: string
+  entityType: string
+  entityId: string
+  link: string
+  createdAt: string
+  isRead: boolean
+  readAt: string | null
+}
+
+export interface NotificationPage {
+  page: number
+  pageSize: number
+  total: number
+  items: NotificationResponse[]
+}