Refactor code structure for improved readability and maintainability

Reviewed-on: #47

.gitignore

@@ -30,12 +30,10 @@ yarn-error.log*
 Thumbs.db
 .idea/
 
-# ── Migrations ─────────────────────────────────────────────────────────
-# Reverted 2026-07-31: excluding new EF Core migrations while
-# ErpDbContextModelSnapshot.cs stayed tracked meant every `dotnet ef
-# migrations add` after the initial 4 silently produced a migration git would
-# never see, while the (tracked) snapshot's changes committed normally —
-# so the snapshot kept claiming tables existed that no migration in git
-# history ever created them. Confirmed live: 25 HRM tables + 11 Manufacturing
-# tables were missing from the actual database for exactly this reason.
-# Migrations now stay tracked like any other source file — commit them.
+# ── Playwright E2E (Testing/e2e) ──────────────────────────────────────
+Testing/e2e/playwright-report/
+Testing/e2e/test-results/
+Testing/e2e/.auth/
+Testing/e2e/blob-report/
+
+

Backend/ERPCore/Controllers/BundleSalesController.cs

@@ -0,0 +1,80 @@
+using ERPCore.Domain.Enums;
+using ERPCore.Dtos.Common;
+using ERPCore.Dtos.Sales;
+using ERPCore.Services.Interfaces;
+using Microsoft.AspNetCore.Mvc;
+
+namespace ERPCore.Controllers;
+
+[Route("api/v1/bundle-sales")]
+public sealed class BundleSalesController : ApiControllerBase
+{
+    private readonly IBundleSaleService _bundles;
+
+    public BundleSalesController(IBundleSaleService bundles) => _bundles = bundles;
+
+    [HttpGet("templates")]
+    [ProducesResponseType(typeof(PagedResponse<BundleSaleTemplateSummaryDto>), StatusCodes.Status200OK)]
+    public async Task<ActionResult<PagedResponse<BundleSaleTemplateSummaryDto>>> ListTemplates(
+        [FromQuery] PageQuery query,
+        CancellationToken ct)
+        => Ok(await _bundles.ListTemplatesAsync(query, ct));
+
+    [HttpGet("templates/{bundleSaleTemplateId:int}")]
+    [ProducesResponseType(typeof(BundleSaleTemplateDto), StatusCodes.Status200OK)]
+    [ProducesResponseType(StatusCodes.Status404NotFound)]
+    public async Task<ActionResult<BundleSaleTemplateDto>> GetTemplate(int bundleSaleTemplateId, CancellationToken ct)
+    {
+        var result = await _bundles.GetTemplateAsync(bundleSaleTemplateId, ct);
+        return result is null ? NotFound() : Ok(result);
+    }
+
+    [HttpGet]
+    [ProducesResponseType(typeof(PagedResponse<BundleSaleSummaryDto>), StatusCodes.Status200OK)]
+    public async Task<ActionResult<PagedResponse<BundleSaleSummaryDto>>> List(
+        [FromQuery] PageQuery query,
+        [FromQuery] BundleSaleStatus? status,
+        [FromQuery] int? customerId,
+        [FromQuery] int? warehouseId,
+        CancellationToken ct)
+        => Ok(await _bundles.ListAsync(query, status, customerId, warehouseId, ct));
+
+    [HttpGet("{bundleSaleId:int}")]
+    [ProducesResponseType(typeof(BundleSaleDto), StatusCodes.Status200OK)]
+    [ProducesResponseType(StatusCodes.Status404NotFound)]
+    public async Task<ActionResult<BundleSaleDto>> GetById(int bundleSaleId, CancellationToken ct)
+    {
+        var result = await _bundles.GetAsync(bundleSaleId, ct);
+        return result is null ? NotFound() : Ok(result);
+    }
+
+    [HttpGet("{bundleSaleId:int}/posting-check")]
+    [ProducesResponseType(typeof(BundleSalePostingCheckDto), StatusCodes.Status200OK)]
+    public async Task<ActionResult<BundleSalePostingCheckDto>> PostingCheck(int bundleSaleId, CancellationToken ct)
+        => Ok(await _bundles.CheckPostingAsync(bundleSaleId, ct));
+
+    [HttpPost]
+    [ProducesResponseType(typeof(BundleSaleDto), StatusCodes.Status201Created)]
+    public async Task<ActionResult<BundleSaleDto>> Create([FromBody] CreateBundleSaleRequest request, CancellationToken ct)
+    {
+        var result = await _bundles.CreateAsync(request, ct);
+        return Created($"/api/v1/bundle-sales/{result.BundleSaleId}", result);
+    }
+
+    [HttpPut("{bundleSaleId:int}")]
+    [ProducesResponseType(typeof(BundleSaleDto), StatusCodes.Status200OK)]
+    public async Task<ActionResult<BundleSaleDto>> Update(int bundleSaleId, [FromBody] UpdateBundleSaleRequest request, CancellationToken ct)
+    {
+        return Ok(await _bundles.UpdateAsync(bundleSaleId, request, ct));
+    }
+
+    [HttpPost("{bundleSaleId:int}/post")]
+    [ProducesResponseType(typeof(BundleSaleDto), StatusCodes.Status200OK)]
+    public async Task<ActionResult<BundleSaleDto>> Post(int bundleSaleId, CancellationToken ct)
+        => Ok(await _bundles.PostAsync(bundleSaleId, ct));
+
+    [HttpPost("{bundleSaleId:int}/cancel")]
+    [ProducesResponseType(typeof(BundleSaleDto), StatusCodes.Status200OK)]
+    public async Task<ActionResult<BundleSaleDto>> Cancel(int bundleSaleId, CancellationToken ct)
+        => Ok(await _bundles.CancelAsync(bundleSaleId, ct));
+}

Backend/ERPCore/Controllers/GrnsController.cs

@@ -11,8 +11,13 @@ namespace ERPCore.Controllers;
 public sealed class GrnsController : ApiControllerBase
 {
     private readonly IGrnService _grns;
+    private readonly IGrnPaymentService _payments;
 
-    public GrnsController(IGrnService grns) => _grns = grns;
+    public GrnsController(IGrnService grns, IGrnPaymentService payments)
+    {
+        _grns = grns;
+        _payments = payments;
+    }
 
     /// <summary>List GRNs, newest first.</summary>
     [HttpGet]
@@ -59,4 +64,23 @@ public sealed class GrnsController : ApiControllerBase
     public async Task<ActionResult<ReleaseLineResultDto>> Release(
         int grnId, int grnLineId, [FromBody] ReleaseLineRequest request, CancellationToken ct)
         => Ok(await _grns.ReleaseLineAsync(grnId, grnLineId, request.Action, ct));
+
+    /// <summary>Pay the vendor against this GRN's balance, in full or in installments; posts a real GL journal entry.</summary>
+    [HttpPost("{grnId:int}/payments")]
+    [ProducesResponseType(typeof(GrnPaymentDto), StatusCodes.Status201Created)]
+    [ProducesResponseType(StatusCodes.Status400BadRequest)]
+    [ProducesResponseType(StatusCodes.Status404NotFound)]
+    [ProducesResponseType(StatusCodes.Status409Conflict)]
+    public async Task<ActionResult<GrnPaymentDto>> Pay(int grnId, [FromBody] CreateGrnPaymentRequest request, CancellationToken ct)
+    {
+        var dto = await _payments.PayAsync(grnId, request, ct);
+        return Created($"/api/v1/grns/{grnId}/payments/{dto.GrnPaymentId}", dto);
+    }
+
+    /// <summary>Payment history for this GRN, newest first.</summary>
+    [HttpGet("{grnId:int}/payments")]
+    [ProducesResponseType(typeof(IReadOnlyList<GrnPaymentDto>), StatusCodes.Status200OK)]
+    [ProducesResponseType(StatusCodes.Status404NotFound)]
+    public async Task<ActionResult<IReadOnlyList<GrnPaymentDto>>> ListPayments(int grnId, CancellationToken ct)
+        => Ok(await _payments.ListAsync(grnId, ct));
 }

Backend/ERPCore/Controllers/ItemsController.cs

@@ -81,11 +81,4 @@ public sealed class ItemsController : ApiControllerBase
     [ProducesResponseType(StatusCodes.Status404NotFound)]
     public async Task<ActionResult<ItemReorderSettingsDto>> UpdateReorder(int itemId, [FromBody] UpdateReorderRequest request, CancellationToken ct)
         => Ok(await _items.UpdateReorderAsync(itemId, request, ct));
-
-    /// <summary>Replace the item's UOM conversions (FR-MD-02).</summary>
-    [HttpPut("{itemId:int}/uom-conversions")]
-    [ProducesResponseType(typeof(ItemUomConversionsDto), StatusCodes.Status200OK)]
-    [ProducesResponseType(StatusCodes.Status404NotFound)]
-    public async Task<ActionResult<ItemUomConversionsDto>> UpdateUomConversions(int itemId, [FromBody] UpdateUomConversionsRequest request, CancellationToken ct)
-        => Ok(await _items.UpdateUomConversionsAsync(itemId, request, ct));
 }

Backend/ERPCore/Controllers/SalesDayEndController.cs

@@ -0,0 +1,50 @@
+using ERPCore.Dtos.Common;
+using ERPCore.Dtos.Sales;
+using ERPCore.Services.Interfaces;
+using Microsoft.AspNetCore.Mvc;
+
+namespace ERPCore.Controllers;
+
+/// <summary>Cashier day-end close-out — locks a cashier's Posted sales slips for a business
+/// date and posts one consolidated GL journal entry for the day (docs/14 Sales API).</summary>
+[Route("api/v1/sales-day-end")]
+public sealed class SalesDayEndController : ApiControllerBase
+{
+    private readonly ISalesDayEndService _dayEnds;
+
+    public SalesDayEndController(ISalesDayEndService dayEnds) => _dayEnds = dayEnds;
+
+    /// <summary>List day-end closes, newest first.</summary>
+    [HttpGet]
+    [ProducesResponseType(typeof(PagedResponse<SalesDayEndSummaryDto>), StatusCodes.Status200OK)]
+    public async Task<ActionResult<PagedResponse<SalesDayEndSummaryDto>>> List(
+        [FromQuery] PageQuery query, [FromQuery] int? cashierUserId, CancellationToken ct)
+        => Ok(await _dayEnds.ListAsync(query, cashierUserId, ct));
+
+    /// <summary>What closing this cashier/date right now would include (or the existing close's totals, if already closed).</summary>
+    [HttpGet("preview")]
+    [ProducesResponseType(typeof(SalesDayEndPreviewDto), StatusCodes.Status200OK)]
+    public async Task<ActionResult<SalesDayEndPreviewDto>> Preview(
+        [FromQuery] int cashierUserId, [FromQuery] DateOnly? businessDate, CancellationToken ct)
+        => Ok(await _dayEnds.PreviewAsync(cashierUserId, businessDate ?? DateOnly.FromDateTime(DateTime.UtcNow), ct));
+
+    [HttpGet("{salesDayEndId:int}")]
+    [ProducesResponseType(typeof(SalesDayEndDto), StatusCodes.Status200OK)]
+    [ProducesResponseType(StatusCodes.Status404NotFound)]
+    public async Task<ActionResult<SalesDayEndDto>> GetById(int salesDayEndId, CancellationToken ct)
+    {
+        var dto = await _dayEnds.GetAsync(salesDayEndId, ct);
+        return dto is null ? NotFound() : Ok(dto);
+    }
+
+    /// <summary>Close the day: lock every Posted slip for (CashierUserId, BusinessDate) and post the
+    /// consolidated GL journal entry. Idempotent — closing an already-closed date replays it.</summary>
+    [HttpPost]
+    [ProducesResponseType(typeof(SalesDayEndDto), StatusCodes.Status201Created)]
+    [ProducesResponseType(StatusCodes.Status409Conflict)]
+    public async Task<ActionResult<SalesDayEndDto>> Close([FromBody] CreateSalesDayEndRequest request, CancellationToken ct)
+    {
+        var dto = await _dayEnds.CloseAsync(request, ct);
+        return Created($"/api/v1/sales-day-end/{dto.SalesDayEndId}", dto);
+    }
+}

Backend/ERPCore/Controllers/SalesInvoicesController.cs

@@ -10,8 +10,13 @@ namespace ERPCore.Controllers;
 public sealed class SalesInvoicesController : ApiControllerBase
 {
     private readonly ISalesInvoiceService _invoices;
+    private readonly ISalesInvoicePaymentService _payments;
 
-    public SalesInvoicesController(ISalesInvoiceService invoices) => _invoices = invoices;
+    public SalesInvoicesController(ISalesInvoiceService invoices, ISalesInvoicePaymentService payments)
+    {
+        _invoices = invoices;
+        _payments = payments;
+    }
 
     [HttpGet]
     [ProducesResponseType(typeof(PagedResponse<SalesInvoiceSummaryDto>), StatusCodes.Status200OK)]
@@ -70,4 +75,23 @@ public sealed class SalesInvoicesController : ApiControllerBase
     [ProducesResponseType(typeof(SalesInvoiceDto), StatusCodes.Status200OK)]
     public async Task<ActionResult<SalesInvoiceDto>> Cancel(int salesInvoiceId, CancellationToken ct)
         => Ok(await _invoices.CancelAsync(salesInvoiceId, ct));
+
+    /// <summary>Pay the customer's balance against this invoice, in full or in installments; posts a real GL journal entry.</summary>
+    [HttpPost("{salesInvoiceId:int}/payments")]
+    [ProducesResponseType(typeof(SalesInvoicePaymentDto), StatusCodes.Status201Created)]
+    [ProducesResponseType(StatusCodes.Status400BadRequest)]
+    [ProducesResponseType(StatusCodes.Status404NotFound)]
+    [ProducesResponseType(StatusCodes.Status409Conflict)]
+    public async Task<ActionResult<SalesInvoicePaymentDto>> Pay(int salesInvoiceId, [FromBody] CreateSalesInvoicePaymentRequest request, CancellationToken ct)
+    {
+        var dto = await _payments.PayAsync(salesInvoiceId, request, ct);
+        return Created($"/api/v1/sales-invoices/{salesInvoiceId}/payments/{dto.SalesInvoicePaymentId}", dto);
+    }
+
+    /// <summary>Payment history for this invoice, newest first.</summary>
+    [HttpGet("{salesInvoiceId:int}/payments")]
+    [ProducesResponseType(typeof(IReadOnlyList<SalesInvoicePaymentDto>), StatusCodes.Status200OK)]
+    [ProducesResponseType(StatusCodes.Status404NotFound)]
+    public async Task<ActionResult<IReadOnlyList<SalesInvoicePaymentDto>>> ListPayments(int salesInvoiceId, CancellationToken ct)
+        => Ok(await _payments.ListAsync(salesInvoiceId, ct));
 }

Backend/ERPCore/Controllers/SalesReturnsController.cs

@@ -0,0 +1,49 @@
+using ERPCore.Dtos.Common;
+using ERPCore.Dtos.Sales;
+using ERPCore.Services.Interfaces;
+using Microsoft.AspNetCore.Mvc;
+
+namespace ERPCore.Controllers;
+
+/// <summary>Sales-return endpoints — customer returns of previously sold goods.</summary>
+[Route("api/v1/sales-returns")]
+public sealed class SalesReturnsController : ApiControllerBase
+{
+    private readonly ISalesReturnService _returns;
+
+    public SalesReturnsController(ISalesReturnService returns) => _returns = returns;
+
+    /// <summary>List posted returns, newest first.</summary>
+    [HttpGet]
+    [ProducesResponseType(typeof(PagedResponse<SalesReturnSummaryDto>), StatusCodes.Status200OK)]
+    public async Task<ActionResult<PagedResponse<SalesReturnSummaryDto>>> List(
+        [FromQuery] PageQuery query, [FromQuery] int? customerId, [FromQuery] int? warehouseId, CancellationToken ct)
+        => Ok(await _returns.ListAsync(query, customerId, warehouseId, ct));
+
+    /// <summary>Remaining returnable qty per line of one sales invoice (invoiced qty minus already-returned).</summary>
+    [HttpGet("remaining")]
+    [ProducesResponseType(typeof(IReadOnlyList<SalesInvoiceLineRemainingDto>), StatusCodes.Status200OK)]
+    public async Task<ActionResult<IReadOnlyList<SalesInvoiceLineRemainingDto>>> GetRemaining([FromQuery] int salesInvoiceId, CancellationToken ct)
+        => Ok(await _returns.GetRemainingByInvoiceAsync(salesInvoiceId, ct));
+
+    /// <summary>Get one return with its lines and the ledger entries it posted.</summary>
+    [HttpGet("{returnId:int}")]
+    [ProducesResponseType(typeof(SalesReturnDto), StatusCodes.Status200OK)]
+    [ProducesResponseType(StatusCodes.Status404NotFound)]
+    public async Task<ActionResult<SalesReturnDto>> GetById(int returnId, CancellationToken ct)
+    {
+        var dto = await _returns.GetAsync(returnId, ct);
+        return dto is null ? NotFound() : Ok(dto);
+    }
+
+    /// <summary>Create + auto-post a return (inbound movement).</summary>
+    [HttpPost]
+    [ProducesResponseType(typeof(SalesReturnDto), StatusCodes.Status201Created)]
+    [ProducesResponseType(StatusCodes.Status400BadRequest)]
+    [ProducesResponseType(StatusCodes.Status422UnprocessableEntity)]
+    public async Task<ActionResult<SalesReturnDto>> Create([FromBody] CreateSalesReturnRequest request, CancellationToken ct)
+    {
+        var dto = await _returns.CreateAsync(request, ct);
+        return Created($"/api/v1/sales-returns/{dto.ReturnId}", dto);
+    }
+}

Backend/ERPCore/Domain/DocumentTypes.cs

@@ -19,4 +19,9 @@ public static class DocumentTypes
     public const string Production = "PRD";
     public const string SalesInvoice = "SI";
     public const string SalesSlip = "SSL";
+    public const string BundleSale = "BND";
+    public const string SalesReturn = "SRET";
+
+    /// <summary>Cashier day-end close-out (Sales) — <c>DEND-2026-00001</c>.</summary>
+    public const string SalesDayEnd = "DEND";
 }

Backend/ERPCore/Domain/Entities/BundleSale.cs

@@ -0,0 +1,39 @@
+using ERPCore.Domain.Enums;
+
+namespace ERPCore.Domain.Entities;
+
+public class BundleSale
+{
+    public int BundleSaleId { get; set; }
+    public string BundleNo { get; set; } = string.Empty;
+    public DateTime BundleDate { get; set; }
+    public int CustomerId { get; set; }
+    public Customer? Customer { get; set; }
+    public string CustomerSnapshotName { get; set; } = string.Empty;
+    public int WarehouseId { get; set; }
+    public Warehouse? Warehouse { get; set; }
+    public int CashierUserId { get; set; }
+    public User? CashierUser { get; set; }
+    public int BundleSaleTemplateId { get; set; }
+    public BundleSaleTemplate? BundleSaleTemplate { get; set; }
+    public string BundleName { get; set; } = string.Empty;
+    public string BundleCode { get; set; } = string.Empty;
+    public BundleSaleStatus Status { get; set; } = BundleSaleStatus.Draft;
+    public decimal ComponentSubtotal { get; set; }
+    public decimal BundlePrice { get; set; }
+    public decimal MarginAmount { get; set; }
+    public decimal DiscountTotal { get; set; }
+    public decimal TaxTotal { get; set; }
+    public decimal GrandTotal { get; set; }
+    public DateTime CreatedAt { get; set; }
+    public DateTime? UpdatedAt { get; set; }
+    public int ConcurrencyStamp { get; set; }
+
+    /// <summary>Set once this bundle's business date is closed by <see cref="SalesDayEnd"/> — a
+    /// closed bundle sale is frozen (no further edits). Same role as <see cref="SalesSlip.DayEndId"/>;
+    /// a bundle sale is a cashier document exactly like a sales slip, just priced as a set.</summary>
+    public int? DayEndId { get; set; }
+    public SalesDayEnd? DayEnd { get; set; }
+
+    public ICollection<BundleSaleLine> Lines { get; set; } = new List<BundleSaleLine>();
+}

Backend/ERPCore/Domain/Entities/BundleSaleLine.cs

@@ -0,0 +1,22 @@
+using ERPCore.Domain.Enums;
+
+namespace ERPCore.Domain.Entities;
+
+public class BundleSaleLine
+{
+    public int BundleSaleLineId { get; set; }
+    public int BundleSaleId { get; set; }
+    public BundleSale? BundleSale { get; set; }
+
+    public int ItemId { get; set; }
+    public Item? Item { get; set; }
+    public string Description { get; set; } = string.Empty;
+    public decimal Qty { get; set; }
+    public int WarehouseId { get; set; }
+    public Warehouse? Warehouse { get; set; }
+    public decimal UnitPrice { get; set; }
+    public decimal LineTotal { get; set; }
+    public bool IncludeInBundle { get; set; } = true;
+    public bool IsComponent { get; set; } = true;
+    public int? ParentLineId { get; set; }
+}

Backend/ERPCore/Domain/Entities/BundleSaleTemplate.cs

@@ -0,0 +1,17 @@
+using ERPCore.Domain.Enums;
+
+namespace ERPCore.Domain.Entities;
+
+public class BundleSaleTemplate
+{
+    public int BundleSaleTemplateId { get; set; }
+    public string TemplateCode { get; set; } = string.Empty;
+    public string TemplateName { get; set; } = string.Empty;
+    public string? Description { get; set; }
+    public EntityStatus Status { get; set; } = EntityStatus.Active;
+    public DateTime CreatedAt { get; set; }
+    public DateTime? UpdatedAt { get; set; }
+    public int ConcurrencyStamp { get; set; }
+
+    public ICollection<BundleSaleTemplateLine> Lines { get; set; } = new List<BundleSaleTemplateLine>();
+}

Backend/ERPCore/Domain/Entities/BundleSaleTemplateLine.cs

@@ -0,0 +1,18 @@
+namespace ERPCore.Domain.Entities;
+
+public class BundleSaleTemplateLine
+{
+    public int BundleSaleTemplateLineId { get; set; }
+    public int BundleSaleTemplateId { get; set; }
+    public BundleSaleTemplate? BundleSaleTemplate { get; set; }
+
+    public int ItemId { get; set; }
+    public Item? Item { get; set; }
+    public int WarehouseId { get; set; }
+    public Warehouse? Warehouse { get; set; }
+
+    public decimal Qty { get; set; }
+    public decimal UnitPrice { get; set; }
+    public bool IncludeInBundle { get; set; } = true;
+    public int SortOrder { get; set; }
+}

Backend/ERPCore/Domain/Entities/Grn.cs

@@ -30,8 +30,18 @@ public class Grn
     public DateTime CreatedAt { get; set; }
     public DateTime? PostedAt { get; set; }
 
+    /// <summary>Journal number of the real GL journal entry posted for this GRN's receipt (set on confirm).</summary>
+    public string? GlJournalNo { get; set; }
+    public DateTime? GlPostedAt { get; set; }
+
+    /// <summary>Sum of vendor payments made against this GRN's total payable (<see cref="GrnLine.LineTotal"/>).</summary>
+    public decimal PaidAmount { get; set; }
+    /// <summary>Total payable minus <see cref="PaidAmount"/>; installments accrue against this until it reaches zero.</summary>
+    public decimal BalanceAmount { get; set; }
+
     /// <summary>PostgreSQL xmin-backed optimistic concurrency token.</summary>
     public uint RowVersion { get; set; }
 
     public ICollection<GrnLine> Lines { get; set; } = new List<GrnLine>();
+    public ICollection<GrnPayment> Payments { get; set; } = new List<GrnPayment>();
 }

Backend/ERPCore/Domain/Entities/GrnLine.cs

@@ -25,9 +25,6 @@ public class GrnLine
     public int ItemId { get; set; }
     public Item? Item { get; set; }
 
-    public int UomId { get; set; }
-    public Uom? Uom { get; set; }
-
     public int? BinId { get; set; }
     public Bin? Bin { get; set; }
 
@@ -61,4 +58,11 @@ public class GrnLine
     public decimal LineTotal { get; set; }
 
     public HoldStatus HoldStatus { get; set; } = HoldStatus.Available;
+
+    /// <summary>
+    /// One row per received unit when <see cref="Item.Warranty"/> is
+    /// <see cref="Enums.Warranty.Warranty"/> — count must equal <see cref="Qty"/>.
+    /// Empty for a non-warranty item.
+    /// </summary>
+    public ICollection<GrnLineWarrantyNumber> WarrantyNumbers { get; set; } = new List<GrnLineWarrantyNumber>();
 }

Backend/ERPCore/Domain/Entities/GrnLineWarrantyNumber.cs

@@ -0,0 +1,20 @@
+namespace ERPCore.Domain.Entities;
+
+/// <summary>
+/// One warranty number captured against a single received unit of a warranty-tracked
+/// item (<see cref="Item.Warranty"/> = <see cref="Enums.Warranty.Warranty"/>). A GRN line
+/// for such an item must carry exactly <see cref="GrnLine.Qty"/> of these — one per unit —
+/// mirroring how a Serial-tracked item requires one serial per unit (docs/10 Part C.3).
+/// </summary>
+public class GrnLineWarrantyNumber
+{
+    public int GrnLineWarrantyNumberId { get; set; }
+
+    public int GrnLineId { get; set; }
+    public GrnLine? GrnLine { get; set; }
+
+    public string WarrantyNo { get; set; } = string.Empty;
+
+    /// <summary>Warranty coverage length in months, selected at receipt (e.g. 3/6/12/18).</summary>
+    public int WarrantyPeriodMonths { get; set; }
+}

Backend/ERPCore/Domain/Entities/GrnPayment.cs

@@ -0,0 +1,31 @@
+namespace ERPCore.Domain.Entities;
+
+/// <summary>
+/// A vendor payment made against a confirmed GRN's balance (installments allowed —
+/// see GrnPaymentService.PayAsync). Posts its own real GL journal entry (Debit GRN
+/// Clearing / Credit the selected bank-or-cash account) before being recorded here.
+/// </summary>
+public class GrnPayment
+{
+    public int GrnPaymentId { get; set; }
+
+    public int GrnId { get; set; }
+    public Grn? Grn { get; set; }
+
+    public decimal Amount { get; set; }
+    public DateTime PaymentDate { get; set; }
+
+    /// <summary>GL's numeric id for the bank/cash account the payment was made from.</summary>
+    public long GlBankAccountId { get; set; }
+    /// <summary>Snapshot of the account's display name at payment time (GL account lists have no local FK).</summary>
+    public string BankAccountName { get; set; } = string.Empty;
+
+    public string? Reference { get; set; }
+
+    /// <summary>Journal number of the real GL journal entry this payment posted.</summary>
+    public string? GlJournalNo { get; set; }
+
+    public int CreatedBy { get; set; }
+    public User? Creator { get; set; }
+    public DateTime CreatedAt { get; set; }
+}

Backend/ERPCore/Domain/Entities/Item.cs

@@ -24,6 +24,12 @@ public class Item
     public int? BrandId { get; set; }
     public Brand? Brand { get; set; }
 
+    /// <summary>
+    /// The stocking unit — the pack the item is counted in (BOTTLE, PACKET, BOX, PCS).
+    /// <b>Every</b> quantity in the system is a count of these: stock layers, the ledger,
+    /// and every document line. Nothing converts, so this is the sole meaning of a
+    /// quantity and cannot be changed once the item has stock history.
+    /// </summary>
     public int BaseUomId { get; set; }
     public Uom? BaseUom { get; set; }
 
@@ -32,6 +38,9 @@ public class Item
 
     public StockNature StockNature { get; set; }
     public TrackingMode TrackingMode { get; set; }
+    public Warranty Warranty { get; set; } = Warranty.NonWarranty;
+    /// <summary>Coverage length in months (see <see cref="Enums.WarrantyPeriods.AllowedMonths"/>) when <see cref="Warranty"/> is Warranty; null otherwise.</summary>
+    public int? WarrantyPeriodMonths { get; set; }
     public string? TaxClass { get; set; }
 
     /// <summary>
@@ -41,6 +50,34 @@ public class Item
     /// </summary>
     public decimal? SalePrice { get; set; }
 
+    /// <summary>
+    /// How much one pack holds, as the user entered it — <c>500</c> with
+    /// <see cref="ContentUnit"/> <c>Ml</c> for a 500 ml bottle, <c>1.5</c> with <c>L</c>
+    /// for a 1.5 L one. Null (together with the other three) when the item has no
+    /// measurable content: a screw, a label, a service.
+    /// <para>
+    /// Content never affects stock — that is always a pack count. It exists so production
+    /// can express a formula in millilitres or grams and resolve it to packs
+    /// (see <c>IItemMeasure</c>).
+    /// </para>
+    /// <para>
+    /// A loose bulk item bought by weight is modelled the same way:
+    /// <c>BaseUom = KG, ContentQty = 1, ContentUnit = Kg</c> ⇒ 1000 g per stocked unit.
+    /// </para>
+    /// </summary>
+    public decimal? ContentQty { get; set; }
+    public MeasureUnit? ContentUnit { get; set; }
+
+    /// <summary>
+    /// <see cref="ContentQty"/>/<see cref="ContentUnit"/> normalised to a base unit
+    /// (L→Ml, Kg→G, both ×1000) at write time by <c>ItemContent.Normalize</c>. Server-derived
+    /// and never accepted from a client. <see cref="ContentBaseUnit"/> is therefore only ever
+    /// <see cref="MeasureUnit.Ml"/> or <see cref="MeasureUnit.G"/>.
+    /// <para>Stored rather than recomputed so every consumer reads one settled number.</para>
+    /// </summary>
+    public decimal? ContentBaseQty { get; set; }
+    public MeasureUnit? ContentBaseUnit { get; set; }
+
     public EntityStatus Status { get; set; } = EntityStatus.Active;
 
     public DateTime CreatedAt { get; set; }
@@ -50,5 +87,4 @@ public class Item
     public uint RowVersion { get; set; }
 
     public ICollection<ItemReorder> ReorderSettings { get; set; } = new List<ItemReorder>();
-    public ICollection<UomConversion> UomConversions { get; set; } = new List<UomConversion>();
 }

Backend/ERPCore/Domain/Entities/ItemType.cs

@@ -7,12 +7,15 @@ namespace ERPCore.Domain.Entities;
 /// Material.
 /// <para>
 /// <b>Deliberately unlinked.</b> Nothing references this entity and it references
-/// nothing: there is no value table and no join to <see cref="Item"/>. Its only job is
-/// to feed the frontend's item-builder dropdown via <c>GET /item-types</c>. The chosen
+/// nothing: there is no value table and no join to <see cref="Item"/>. The chosen
 /// values (Red, S, M) are encoded by the client into the generated SKU
 /// (e.g. <c>BL-100-0003</c>) and are never stored or parsed server-side — the item list
 /// is the record of what was built. See the accepted trade-off in docs/10 Part C.9.
 /// </para>
+/// <para>
+/// It does, however, carry one piece of meaning the client acts on:
+/// <see cref="IsMeasurable"/>. So this is no longer purely a dropdown source.
+/// </para>
 /// Not to be confused with <see cref="Enums.StockNature"/> (Stocked/NonStocked/Service),
 /// which is what the old <c>ItemType</c> enum became.
 /// Model: docs/10-BACKEND-PHASE1.md Part C.1.
@@ -21,6 +24,24 @@ public class ItemType
 {
     public int ItemTypeId { get; set; }
     public string Name { get; set; } = string.Empty;
+
+    /// <summary>
+    /// When true, this dimension's values are content <b>measurements</b> (500 ml, 1 L) rather
+    /// than plain labels (Red, S). The item builder then captures a number + unit per value and
+    /// stamps that pair onto each generated item's <see cref="Item.ContentQty"/> /
+    /// <see cref="Item.ContentUnit"/>, instead of copying one form-level pair into every variant
+    /// — which is what makes "Coca-Cola in 500 ml / 1 L / 250 ml" three correctly sized items.
+    /// <para>
+    /// This is what lets an apparel <c>Size</c> (S/M/L) stay plain text while a
+    /// <c>Pack Size</c>/<c>Volume</c> dimension carries ml/g/L/kg.
+    /// </para>
+    /// <para>
+    /// A client hint only: the server never reads it when writing an item. Each item's pair is
+    /// still validated and normalised on its own by <c>ItemContent</c>.
+    /// </para>
+    /// </summary>
+    public bool IsMeasurable { get; set; }
+
     public EntityStatus Status { get; set; } = EntityStatus.Active;
 
     public DateTime CreatedAt { get; set; }

Backend/ERPCore/Domain/Entities/PoLine.cs

@@ -15,9 +15,6 @@ public class PoLine
     public int ItemId { get; set; }
     public Item? Item { get; set; }
 
-    public int UomId { get; set; }
-    public Uom? Uom { get; set; }
-
     public int WarehouseId { get; set; }
     public Warehouse? Warehouse { get; set; }
 

Backend/ERPCore/Domain/Entities/PurchaseReturn.cs

@@ -28,5 +28,12 @@ public class PurchaseReturn
 
     public DateTime CreatedAt { get; set; }
 
+    /// <summary>Journal number of the real GL journal entry posted for this return (set on create — it auto-posts).
+    /// Reverses the Inventory/Clearing lines a Grn posts — <see cref="PurchaseReturnLine"/> carries no unit
+    /// price/VAT of its own, so it can't reverse a VAT-recoverable line the way a real credit note would.</summary>
+    public string? GlJournalNo { get; set; }
+    public DateTime? GlPostedAt { get; set; }
+
     public ICollection<PurchaseReturnLine> Lines { get; set; } = new List<PurchaseReturnLine>();
 }
+

Backend/ERPCore/Domain/Entities/RunStageInput.cs

@@ -31,10 +31,14 @@ public class RunStageInput
     public int? FromRunOutputId { get; set; }
     public RunStageOutput? FromRunOutput { get; set; }
 
-    public int UomId { get; set; }
-    public Uom? Uom { get; set; }
+    /// <summary>Copied from the template input: what <see cref="PlannedQty"/> is expressed in.</summary>
+    public StageQtyUnit QtyUnit { get; set; } = StageQtyUnit.Pack;
 
-    /// <summary>Scaled at creation; per-run editable until the stage starts (FR-MFG-08, <c>409 STAGE_NOT_EDITABLE</c>).</summary>
+    /// <summary>
+    /// Scaled at creation; per-run editable until the stage starts (FR-MFG-08,
+    /// <c>409 STAGE_NOT_EDITABLE</c>). Expressed in <see cref="QtyUnit"/> — so unlike the
+    /// consumption figures below it is <b>not</b> necessarily a pack count.
+    /// </summary>
     public decimal PlannedQty { get; set; }
 
     /// <summary>

Backend/ERPCore/Domain/Entities/RunStageOutput.cs

@@ -23,10 +23,17 @@ public class RunStageOutput
 
     public string Name { get; set; } = string.Empty;
 
-    public int UomId { get; set; }
+    /// <summary>
+    /// Display label for intermediate WIP; null on the terminal output, whose unit is the
+    /// finished item's base UOM. Never converted — see <see cref="StageOutput.UomId"/>.
+    /// </summary>
+    public int? UomId { get; set; }
     public Uom? Uom { get; set; }
 
-    /// <summary>Scaled at creation; per-run editable until the stage starts.</summary>
+    /// <summary>
+    /// Scaled at creation; per-run editable until the stage starts. Every quantity on an
+    /// output is a pack count, so scrap is recorded in whole broken bottles rather than ml.
+    /// </summary>
     public decimal PlannedQty { get; set; }
 
     /// <summary>Recorded at complete. A re-complete after a rework <b>overwrites</b> this, never adds to it.</summary>

Backend/ERPCore/Domain/Entities/SalesDayEnd.cs

@@ -0,0 +1,46 @@
+namespace ERPCore.Domain.Entities;
+
+/// <summary>
+/// A cashier's end-of-day close-out. Aggregates every <see cref="SalesSlip"/> the
+/// cashier posted on <see cref="BusinessDate"/>, freezes them against this record
+/// (<see cref="SalesSlip.DayEndId"/>) so a slip can only ever belong to one day-end,
+/// and posts one consolidated GL journal entry for the day's revenue/tax/COGS —
+/// the sales-side equivalent of how <see cref="Grn"/> posts per receipt. Unique per
+/// (CashierUserId, BusinessDate): closing twice replays the existing record instead
+/// of creating a second one (same idempotent-replay pattern as Grn.ConfirmAsync).
+/// </summary>
+public class SalesDayEnd
+{
+    public int SalesDayEndId { get; set; }
+    public string DocNo { get; set; } = string.Empty;
+
+    public int CashierUserId { get; set; }
+    public User? CashierUser { get; set; }
+
+    /// <summary>The calendar date being closed (matched against each slip's <see cref="SalesSlip.SlipDate"/>, UTC).</summary>
+    public DateOnly BusinessDate { get; set; }
+
+    public int SlipCount { get; set; }
+    public int BundleCount { get; set; }
+    public decimal Subtotal { get; set; }
+    public decimal DiscountTotal { get; set; }
+    public decimal TaxTotal { get; set; }
+    public decimal GrandTotal { get; set; }
+
+    /// <summary>Sum of the FIFO cost consumed for these slips (from <see cref="StockLedger"/>), for the COGS GL lines.</summary>
+    public decimal CostOfGoodsSold { get; set; }
+
+    /// <summary>Journal number of the real GL journal entry posted for this close (null when there was nothing to post).</summary>
+    public string? GlJournalNo { get; set; }
+    public DateTime? GlPostedAt { get; set; }
+
+    public int ClosedBy { get; set; }
+    public User? ClosedByUser { get; set; }
+    public DateTime ClosedAt { get; set; }
+
+    /// <summary>PostgreSQL xmin-backed optimistic concurrency token.</summary>
+    public uint RowVersion { get; set; }
+
+    public ICollection<SalesSlip> Slips { get; set; } = new List<SalesSlip>();
+    public ICollection<BundleSale> BundleSales { get; set; } = new List<BundleSale>();
+}

Backend/ERPCore/Domain/Entities/SalesInvoice.cs

@@ -29,6 +29,14 @@ public class SalesInvoice
     public decimal PaidAmount { get; set; }
     public decimal BalanceAmount { get; set; }
 
+    /// <summary>Journal number of the revenue-recognition GL journal entry posted when this
+    /// invoice is Posted (Debit Accounts Receivable / Credit Sales Revenue + Tax, plus COGS —
+    /// see SalesPostingService.PostInvoiceAsync). Unlike a SalesSlip, an invoice posts its own
+    /// GL entry immediately rather than waiting for Sales Day End, since invoices aren't a
+    /// cashier document and don't go through that close-out.</summary>
+    public string? GlJournalNo { get; set; }
+    public DateTime? GlPostedAt { get; set; }
+
     public int CreatedBy { get; set; }
     public User? Creator { get; set; }
 
@@ -38,4 +46,5 @@ public class SalesInvoice
     public uint RowVersion { get; set; }
 
     public ICollection<SalesInvoiceLine> Lines { get; set; } = new List<SalesInvoiceLine>();
+    public ICollection<SalesInvoicePayment> Payments { get; set; } = new List<SalesInvoicePayment>();
 }

Backend/ERPCore/Domain/Entities/SalesInvoiceLine.cs

@@ -16,8 +16,6 @@ public class SalesInvoiceLine
 
     public decimal Qty { get; set; }
     public decimal FreeQty { get; set; }
-    public int UomId { get; set; }
-    public Uom? Uom { get; set; }
     public int WarehouseId { get; set; }
     public Warehouse? Warehouse { get; set; }
 

Backend/ERPCore/Domain/Entities/SalesInvoicePayment.cs

@@ -0,0 +1,32 @@
+namespace ERPCore.Domain.Entities;
+
+/// <summary>
+/// A customer payment made against a Posted sales invoice's balance (installments
+/// allowed — see SalesInvoicePaymentService.PayAsync). Posts its own real GL journal
+/// entry (Debit the selected bank-or-cash account / Credit Accounts Receivable) before
+/// being recorded here — the mirror image of <see cref="GrnPayment"/>.
+/// </summary>
+public class SalesInvoicePayment
+{
+    public int SalesInvoicePaymentId { get; set; }
+
+    public int SalesInvoiceId { get; set; }
+    public SalesInvoice? SalesInvoice { get; set; }
+
+    public decimal Amount { get; set; }
+    public DateTime PaymentDate { get; set; }
+
+    /// <summary>GL's numeric id for the bank/cash account the payment was received into.</summary>
+    public long GlBankAccountId { get; set; }
+    /// <summary>Snapshot of the account's display name at payment time (GL account lists have no local FK).</summary>
+    public string BankAccountName { get; set; } = string.Empty;
+
+    public string? Reference { get; set; }
+
+    /// <summary>Journal number of the real GL journal entry this payment posted.</summary>
+    public string? GlJournalNo { get; set; }
+
+    public int CreatedBy { get; set; }
+    public User? Creator { get; set; }
+    public DateTime CreatedAt { get; set; }
+}

Backend/ERPCore/Domain/Entities/SalesReturn.cs

@@ -0,0 +1,38 @@
+using ERPCore.Domain.Enums;
+
+namespace ERPCore.Domain.Entities;
+
+/// <summary>
+/// Sales return header — a customer returns previously sold goods, generating an
+/// inbound stock movement. Auto-posts with a mandatory reason code, mirroring
+/// <see cref="PurchaseReturn"/> with the direction reversed.
+/// </summary>
+public class SalesReturn
+{
+    public int ReturnId { get; set; }
+    public string DocNo { get; set; } = string.Empty;
+
+    public int CustomerId { get; set; }
+    public Customer? Customer { get; set; }
+
+    public int WarehouseId { get; set; }
+    public Warehouse? Warehouse { get; set; }
+
+    public int ReasonCodeId { get; set; }
+    public ReasonCode? ReasonCode { get; set; }
+
+    public ReturnStatus Status { get; set; } = ReturnStatus.Posted;
+
+    public int CreatedBy { get; set; }
+    public User? Creator { get; set; }
+
+    public DateTime CreatedAt { get; set; }
+
+    /// <summary>Journal number of the real GL journal entry posted for this return (set on create — it auto-posts).
+    /// Reverses Inventory/COGS only — <see cref="SalesReturnLine"/> carries no unit price, so revenue/tax aren't
+    /// reversed here (they'd need a per-line price this document doesn't capture).</summary>
+    public string? GlJournalNo { get; set; }
+    public DateTime? GlPostedAt { get; set; }
+
+    public ICollection<SalesReturnLine> Lines { get; set; } = new List<SalesReturnLine>();
+}

Backend/ERPCore/Domain/Entities/SalesReturnLine.cs

@@ -0,0 +1,21 @@
+namespace ERPCore.Domain.Entities;
+
+/// <summary>
+/// Sales-return line referencing the original sales invoice line for traceability.
+/// <see cref="Qty"/> is in base UOM.
+/// </summary>
+public class SalesReturnLine
+{
+    public int ReturnLineId { get; set; }
+
+    public int ReturnId { get; set; }
+    public SalesReturn? Return { get; set; }
+
+    public int? SalesInvoiceLineId { get; set; }
+    public SalesInvoiceLine? SalesInvoiceLine { get; set; }
+
+    public int ItemId { get; set; }
+    public Item? Item { get; set; }
+
+    public decimal Qty { get; set; }
+}

Backend/ERPCore/Domain/Entities/SalesSlip.cs

@@ -27,6 +27,10 @@ public class SalesSlip
     public decimal PaidAmount { get; set; }
     public decimal BalanceAmount { get; set; }
 
+    /// <summary>Set once this slip's business date is closed by <see cref="SalesDayEnd"/> — a closed slip is frozen (no further edits).</summary>
+    public int? DayEndId { get; set; }
+    public SalesDayEnd? DayEnd { get; set; }
+
     public DateTime CreatedAt { get; set; }
     public DateTime? UpdatedAt { get; set; }
 

Backend/ERPCore/Domain/Entities/SalesSlipLine.cs

@@ -16,8 +16,6 @@ public class SalesSlipLine
 
     public decimal Qty { get; set; }
     public decimal FreeQty { get; set; }
-    public int UomId { get; set; }
-    public Uom? Uom { get; set; }
     public int WarehouseId { get; set; }
     public Warehouse? Warehouse { get; set; }
 

Backend/ERPCore/Domain/Entities/StageInput.cs

@@ -32,8 +32,13 @@ public class StageInput
     public int? FromOutputId { get; set; }
     public StageOutput? FromOutput { get; set; }
 
-    public int UomId { get; set; }
-    public Uom? Uom { get; set; }
+    /// <summary>
+    /// What <see cref="QtyPerBatch"/> is expressed in. Stock inputs may use
+    /// <see cref="StageQtyUnit.Content"/> (ml/g) when the item has a content size; Upstream
+    /// inputs are always <see cref="StageQtyUnit.Pack"/> — WIP is counted in the unit its
+    /// source output declares.
+    /// </summary>
+    public StageQtyUnit QtyUnit { get; set; } = StageQtyUnit.Pack;
 
     public decimal QtyPerBatch { get; set; }
 }

Backend/ERPCore/Domain/Entities/StageOutput.cs

@@ -20,8 +20,14 @@ public class StageOutput
 
     public string Name { get; set; } = string.Empty;
 
-    public int UomId { get; set; }
+    /// <summary>
+    /// Display label for intermediate work-in-progress. Required when <see cref="ItemId"/>
+    /// is null and must be null when it is set — a real item's unit is its own base UOM.
+    /// WIP never touches stock or the ledger, so this is never converted, only shown.
+    /// </summary>
+    public int? UomId { get; set; }
     public Uom? Uom { get; set; }
 
+    /// <summary>Always a pack count: of the WIP unit above, or of the item's base UOM.</summary>
     public decimal QtyPerBatch { get; set; }
 }

Backend/ERPCore/Domain/Entities/StockAdjustment.cs

@@ -27,5 +27,10 @@ public class StockAdjustment
     public DateTime CreatedAt { get; set; }
     public uint RowVersion { get; set; }
 
+    /// <summary>Journal number of the real GL journal entry posted for this adjustment (set on create — it
+    /// auto-posts). Increases and decreases post separately (never netted) so gains/losses stay visible.</summary>
+    public string? GlJournalNo { get; set; }
+    public DateTime? GlPostedAt { get; set; }
+
     public ICollection<StockAdjustmentLine> Lines { get; set; } = new List<StockAdjustmentLine>();
 }

Backend/ERPCore/Domain/Entities/Uom.cs

@@ -1,8 +1,10 @@
 namespace ERPCore.Domain.Entities;
 
 /// <summary>
-/// Unit of Measure (FR-MD-02). Referenced as an item's base UOM and as the
-/// endpoints of a <see cref="UomConversion"/>. Model: docs/10-BACKEND-PHASE1.md Part C.1.
+/// Unit of Measure (FR-MD-02). A flat lookup, used as an item's base UOM — the pack every
+/// quantity in the system counts — and as the display label on an intermediate production
+/// output. There are no conversions between UOMs: an item is stocked in exactly one, and a
+/// differently sized pack is a different item. Model: docs/10-BACKEND-PHASE1.md Part C.1.
 /// </summary>
 public class Uom
 {

Backend/ERPCore/Domain/Entities/UomConversion.cs

@@ -1,22 +0,0 @@
-namespace ERPCore.Domain.Entities;
-
-/// <summary>
-/// Per-item conversion factor between two UOMs (FR-MD-02/03): quantity in
-/// <see cref="FromUomId"/> × <see cref="Factor"/> = quantity in <see cref="ToUomId"/>.
-/// Model: docs/10-BACKEND-PHASE1.md Part C.1.
-/// </summary>
-public class UomConversion
-{
-    public int ConversionId { get; set; }
-
-    public int ItemId { get; set; }
-    public Item? Item { get; set; }
-
-    public int FromUomId { get; set; }
-    public Uom? FromUom { get; set; }
-
-    public int ToUomId { get; set; }
-    public Uom? ToUom { get; set; }
-
-    public decimal Factor { get; set; }
-}

Backend/ERPCore/Domain/Enums/BundleSaleStatus.cs

@@ -0,0 +1,8 @@
+namespace ERPCore.Domain.Enums;
+
+public enum BundleSaleStatus
+{
+    Draft = 0,
+    Posted = 1,
+    Cancelled = 2
+}

Backend/ERPCore/Domain/Enums/MeasureUnit.cs

@@ -0,0 +1,23 @@
+namespace ERPCore.Domain.Enums;
+
+/// <summary>
+/// Unit of an item's <b>content size</b> — how much a single stocked pack holds
+/// (a 500 ml bottle, a 50 kg sack). Stored as a string in the database.
+/// <para>
+/// This is <b>not</b> a stocking unit. Stock is always counted in packs
+/// (<c>Item.BaseUomId</c>); content is a separate, optional attribute used by
+/// production to turn "2000 ml of syrup" into a pack count.
+/// </para>
+/// <para>
+/// Only <see cref="Ml"/> and <see cref="G"/> are ever stored as a <i>base</i> content
+/// unit. <see cref="L"/> and <see cref="Kg"/> are entry conveniences normalised ×1000
+/// on write by <c>ItemContent.Normalize</c>, so nothing downstream has to convert.
+/// </para>
+/// </summary>
+public enum MeasureUnit
+{
+    Ml,
+    L,
+    G,
+    Kg
+}

Backend/ERPCore/Domain/Enums/StageQtyUnit.cs

@@ -0,0 +1,22 @@
+namespace ERPCore.Domain.Enums;
+
+/// <summary>
+/// What a stage input's quantity is expressed in (FR-MFG-04). Stored as a string.
+/// <para>
+/// Deliberately explicit rather than inferred from whether the item happens to have a
+/// content size: templates outlive item edits, so an inferred unit would let adding a
+/// content size to an existing item silently reinterpret every saved formula — "300"
+/// meaning 300 packs would become 300 ml.
+/// </para>
+/// </summary>
+public enum StageQtyUnit
+{
+    /// <summary>A count of the item's base UOM — bottles, packets, pieces.</summary>
+    Pack,
+
+    /// <summary>
+    /// An amount of the item's content in its base content unit (ml or g), resolved to
+    /// packs by <c>IItemMeasure</c> at stage start. Requires the item to have a content size.
+    /// </summary>
+    Content
+}

Backend/ERPCore/Domain/Enums/Warranty.cs

@@ -0,0 +1,17 @@
+namespace ERPCore.Domain.Enums;
+
+/// <summary>
+/// Whether an item is sold under warranty (FR-MD-01). Stored as a string, same
+/// convention as <see cref="StockNature"/> and <see cref="TrackingMode"/>.
+/// </summary>
+public enum Warranty
+{
+    NonWarranty,
+    Warranty
+}
+
+/// <summary>Allowed warranty coverage lengths, in months — set once on the item (FR-MD-01).</summary>
+public static class WarrantyPeriods
+{
+    public static readonly int[] AllowedMonths = { 3, 6, 12, 18 };
+}

Backend/ERPCore/Dtos/Grn/GrnDtos.cs

@@ -5,32 +5,47 @@ namespace ERPCore.Dtos.Grn;
 
 // Responses (docs/11 §4) --------------------------------------------------------
 
+public sealed record GrnLineWarrantyNumberDto(string WarrantyNo, int WarrantyPeriodMonths);
+
 public sealed record GrnLineDto(
-    int GrnLineId, int? PoLineId, int ItemId, int UomId, int? BinId,
+    int GrnLineId, int? PoLineId, int ItemId, int? BinId,
     decimal Qty, decimal UnitCost, decimal? PoUnitPrice,
     decimal DiscountPct, decimal NetUnitCost, decimal VatPct, decimal VatAmount,
     decimal ReceivedValue, decimal LineTotal, decimal PriceVariance,
-    HoldStatus HoldStatus, int? BatchId);
+    HoldStatus HoldStatus, int? BatchId, IReadOnlyList<GrnLineWarrantyNumberDto> WarrantyNumbers);
 
 public sealed record GrnDto(
     int GrnId, string DocNo, int? PoId, int VendorId, int WarehouseId, GrnStatus Status,
-    int CreatedBy, DateTime CreatedAt, DateTime? PostedAt, IReadOnlyList<GrnLineDto> Lines);
+    int CreatedBy, DateTime CreatedAt, DateTime? PostedAt, string? GlJournalNo,
+    decimal PaidAmount, decimal BalanceAmount, IReadOnlyList<GrnLineDto> Lines);
 
 /// <summary>Row shape for <c>GET /grns</c> — line count instead of the lines themselves.</summary>
 public sealed record GrnSummaryDto(
     int GrnId, string DocNo, int? PoId, int VendorId, int WarehouseId, GrnStatus Status,
-    int CreatedBy, DateTime CreatedAt, DateTime? PostedAt, int LineCount);
+    int CreatedBy, DateTime CreatedAt, DateTime? PostedAt, int LineCount,
+    decimal PaidAmount, decimal BalanceAmount);
 
 public sealed record CreatedLayerDto(
     int LayerId, int ItemId, int WarehouseId, int? BatchId,
     decimal QtyReceived, decimal QtyRemaining, decimal UnitCost, DateTime ReceiptDate);
 
 public sealed record GrnConfirmResultDto(
-    int GrnId, GrnStatus Status, DateTime PostedAt,
+    int GrnId, GrnStatus Status, DateTime PostedAt, string GlJournalNo, decimal BalanceAmount,
     IReadOnlyList<CreatedLayerDto> CreatedLayers, IReadOnlyList<int> LedgerRefs, PurchaseOrderStatus? PoStatus);
 
 public sealed record ReleaseLineResultDto(int GrnLineId, HoldStatus HoldStatus);
 
+public sealed record GrnPaymentDto(
+    int GrnPaymentId, int GrnId, decimal Amount, DateTime PaymentDate,
+    long GlBankAccountId, string BankAccountName, string? Reference, string? GlJournalNo, DateTime CreatedAt);
+
+public sealed class CreateGrnPaymentRequest
+{
+    [Range(0.01, double.MaxValue)] public decimal Amount { get; set; }
+    [Required] public long GlBankAccountId { get; set; }
+    [StringLength(100)] public string? Reference { get; set; }
+}
+
 // Requests ----------------------------------------------------------------------
 
 public sealed class BatchInput
@@ -44,7 +59,6 @@ public sealed class CreateGrnLineInput
     /// <summary>Set for a PO-based receipt; cost is then derived from the PO line (02-SECURITY C.3).</summary>
     public int? PoLineId { get; set; }
     [Required] public int ItemId { get; set; }
-    [Required] public int UomId { get; set; }
     public int? BinId { get; set; }
     [Range(0.0001, double.MaxValue)] public decimal Qty { get; set; }
     /// <summary>
@@ -59,6 +73,11 @@ public sealed class CreateGrnLineInput
     [Range(0, 100)] public decimal VatPct { get; set; }
     [EnumDataType(typeof(HoldStatus))] public HoldStatus HoldStatus { get; set; } = HoldStatus.Available;
     public BatchInput? Batch { get; set; }
+    /// <summary>
+    /// Required, one per unit (count must equal <see cref="Qty"/>), when the item is
+    /// warranty-tracked (<c>Item.Warranty == Warranty.Warranty</c>). Ignored otherwise.
+    /// </summary>
+    public List<string>? WarrantyNumbers { get; set; }
 }
 
 public sealed class CreateGrnRequest

Backend/ERPCore/Dtos/ItemTypes/ItemTypeDtos.cs

@@ -5,12 +5,16 @@ namespace ERPCore.Dtos.ItemTypes;
 
 /// <summary>
 /// Item type resource (docs/11-BACKEND-PHASE1.md §2.7) — a dimension name such as Color
-/// or Size. Carries no values and no item linkage: <c>GET /item-types</c> exists to
-/// populate the frontend builder's dropdown, and the chosen values are encoded into the
+/// or Size. Carries no values and no item linkage: the chosen values are encoded into the
 /// client-generated SKU rather than stored (docs/10 Part C.9).
+/// <para>
+/// <c>IsMeasurable</c> marks a dimension whose values are content measurements (500 ml, 1 L)
+/// rather than plain labels; the builder captures a number + unit per value and writes it to
+/// each generated item's content size.
+/// </para>
 /// </summary>
 public sealed record ItemTypeDto(
-    int ItemTypeId, string Name, EntityStatus Status, DateTime CreatedAt, DateTime? UpdatedAt);
+    int ItemTypeId, string Name, bool IsMeasurable, EntityStatus Status, DateTime CreatedAt, DateTime? UpdatedAt);
 
 // Request DTOs — narrow: server-controlled fields (status, ids, timestamps)
 // are intentionally excluded to prevent over-posting (02-SECURITY B.6 / C.1). ----
@@ -18,11 +22,21 @@ public sealed record ItemTypeDto(
 public sealed class CreateItemTypeRequest
 {
     [Required, StringLength(200)] public string Name { get; set; } = string.Empty;
+
+    /// <summary>Omitted ⇒ false, i.e. plain-text values. See <see cref="ItemTypeDto"/>.</summary>
+    public bool IsMeasurable { get; set; }
 }
 
 public sealed class UpdateItemTypeRequest
 {
     [Required, StringLength(200)] public string Name { get; set; } = string.Empty;
+
+    /// <summary>
+    /// Nullable on purpose: a plain <c>bool</c> binds an absent property as <c>false</c>, so any
+    /// client that PUT only a name — as the item-types screen used to — would silently clear the
+    /// flag on every rename. Omitting this field <b>preserves</b> the stored value.
+    /// </summary>
+    public bool? IsMeasurable { get; set; }
 }
 
 public sealed class UpdateItemTypeStatusRequest

Backend/ERPCore/Dtos/Items/ItemDtos.cs

@@ -9,7 +9,11 @@ namespace ERPCore.Dtos.Items;
 public sealed record ItemListItemDto(
     int ItemId, string Sku, string Name, int CategoryId, int? SubCategoryId, int? BrandId,
     int BaseUomId, int? DefaultVendorId, StockNature StockNature, TrackingMode TrackingMode,
-    string? TaxClass, decimal? SalePrice, EntityStatus Status);
+    Warranty Warranty, int? WarrantyPeriodMonths,
+    string? TaxClass, decimal? SalePrice,
+    decimal? ContentQty, MeasureUnit? ContentUnit,
+    decimal? ContentBaseQty, MeasureUnit? ContentBaseUnit,
+    EntityStatus Status);
 
 /// <summary>A single per-warehouse reorder policy row.</summary>
 public sealed record ItemReorderDto(int WarehouseId, decimal ReorderPoint, decimal ReorderQty);
@@ -17,26 +21,22 @@ public sealed record ItemReorderDto(int WarehouseId, decimal ReorderPoint, decim
 /// <summary>
 /// Full item resource for <c>GET /items/{id}</c> and create/update responses.
 /// <para>
-/// <see cref="Conversions"/> is embedded because they are otherwise unreadable: they can
-/// only be written via <c>PUT /items/{id}/uom-conversions</c>, which returns them, but no
-/// endpoint reads them back — so a detail screen could never show current state before
-/// editing. Mirrors how <see cref="Reorder"/> is already inlined.
+/// <c>ContentBaseQty</c>/<c>ContentBaseUnit</c> are echoed back so a detail screen can show
+/// what the entered size normalised to (1.5 L ⇒ 1500 ml) — they are server-derived and are
+/// not accepted on write.
 /// </para>
 /// </summary>
 public sealed record ItemDetailDto(
     int ItemId, string Sku, string Name, string? Description, int CategoryId,
     int? SubCategoryId, int? BrandId, int BaseUomId, int? DefaultVendorId,
     StockNature StockNature, TrackingMode TrackingMode,
-    string? TaxClass, decimal? SalePrice, EntityStatus Status, IReadOnlyList<ItemReorderDto> Reorder,
-    IReadOnlyList<UomConversionDto> Conversions,
+    Warranty Warranty, int? WarrantyPeriodMonths,
+    string? TaxClass, decimal? SalePrice,
+    decimal? ContentQty, MeasureUnit? ContentUnit,
+    decimal? ContentBaseQty, MeasureUnit? ContentBaseUnit,
+    EntityStatus Status, IReadOnlyList<ItemReorderDto> Reorder,
     DateTime CreatedAt, DateTime? UpdatedAt);
 
-/// <summary>UOM conversion row (docs/11 §2.2).</summary>
-public sealed record UomConversionDto(int ConversionId, int FromUom, int ToUom, decimal Factor);
-
-/// <summary>Response body for <c>PUT /items/{id}/uom-conversions</c>.</summary>
-public sealed record ItemUomConversionsDto(int ItemId, int BaseUomId, IReadOnlyList<UomConversionDto> Conversions);
-
 /// <summary>Response body for <c>PUT /items/{id}/reorder</c>.</summary>
 public sealed record ItemReorderSettingsDto(IReadOnlyList<ItemReorderDto> Settings);
 
@@ -61,9 +61,20 @@ public sealed class CreateItemRequest
     public int? DefaultVendorId { get; set; }
     [Required, EnumDataType(typeof(StockNature))] public StockNature StockNature { get; set; }
     [EnumDataType(typeof(TrackingMode))] public TrackingMode TrackingMode { get; set; } = TrackingMode.None;
+    [EnumDataType(typeof(Warranty))] public Warranty Warranty { get; set; } = Warranty.NonWarranty;
+    /// <summary>Required (one of <see cref="Enums.WarrantyPeriods.AllowedMonths"/>) when <see cref="Warranty"/> is Warranty; ignored otherwise.</summary>
+    public int? WarrantyPeriodMonths { get; set; }
     [StringLength(20)] public string? TaxClass { get; set; }
     /// <summary>Optional fixed sale price (Sales only). Null ⇒ sell at stock/FIFO value.</summary>
     [Range(0, double.MaxValue)] public decimal? SalePrice { get; set; }
+
+    /// <summary>
+    /// How much one pack holds. Supply with <see cref="ContentUnit"/> or leave both null
+    /// for items with no measurable content. The normalised base pair is derived by the
+    /// server and is deliberately not accepted here.
+    /// </summary>
+    [Range(0.0001, double.MaxValue)] public decimal? ContentQty { get; set; }
+    [EnumDataType(typeof(MeasureUnit))] public MeasureUnit? ContentUnit { get; set; }
 }
 
 public sealed class UpdateItemRequest
@@ -80,9 +91,20 @@ public sealed class UpdateItemRequest
     public int? DefaultVendorId { get; set; }
     [Required, EnumDataType(typeof(StockNature))] public StockNature StockNature { get; set; }
     [EnumDataType(typeof(TrackingMode))] public TrackingMode TrackingMode { get; set; } = TrackingMode.None;
+    [EnumDataType(typeof(Warranty))] public Warranty Warranty { get; set; } = Warranty.NonWarranty;
+    /// <summary>Required (one of <see cref="Enums.WarrantyPeriods.AllowedMonths"/>) when <see cref="Warranty"/> is Warranty; ignored otherwise.</summary>
+    public int? WarrantyPeriodMonths { get; set; }
     [StringLength(20)] public string? TaxClass { get; set; }
     /// <summary>Optional fixed sale price (Sales only). Null ⇒ sell at stock/FIFO value.</summary>
     [Range(0, double.MaxValue)] public decimal? SalePrice { get; set; }
+
+    /// <summary>
+    /// How much one pack holds. Supply with <see cref="ContentUnit"/> or leave both null
+    /// for items with no measurable content. The normalised base pair is derived by the
+    /// server and is deliberately not accepted here.
+    /// </summary>
+    [Range(0.0001, double.MaxValue)] public decimal? ContentQty { get; set; }
+    [EnumDataType(typeof(MeasureUnit))] public MeasureUnit? ContentUnit { get; set; }
 }
 
 public sealed class UpdateItemStatusRequest
@@ -101,15 +123,3 @@ public sealed class UpdateReorderRequest
 {
     [Required, MinLength(1)] public List<ReorderSettingInput> Settings { get; set; } = new();
 }
-
-public sealed class UomConversionInput
-{
-    [Required] public int FromUom { get; set; }
-    [Required] public int ToUom { get; set; }
-    [Range(0.000001, double.MaxValue)] public decimal Factor { get; set; }
-}
-
-public sealed class UpdateUomConversionsRequest
-{
-    [Required, MinLength(1)] public List<UomConversionInput> Conversions { get; set; } = new();
-}

Backend/ERPCore/Dtos/Procurement/PurchaseOrderDtos.cs

@@ -6,7 +6,7 @@ namespace ERPCore.Dtos.Procurement;
 // Responses (docs/11 §3.3) ------------------------------------------------------
 
 public sealed record PoLineDto(
-    int PoLineId, int ItemId, int UomId, int WarehouseId,
+    int PoLineId, int ItemId, int WarehouseId,
     decimal Qty, decimal UnitPrice, decimal Tax, decimal QtyReceived);
 
 public sealed record PoTotalsDto(decimal SubTotal, decimal Tax, decimal GrandTotal, string Currency);
@@ -25,7 +25,6 @@ public sealed record PurchaseOrderSummaryDto(
 public sealed class CreatePoLineInput
 {
     [Required] public int ItemId { get; set; }
-    [Required] public int UomId { get; set; }
     [Required] public int WarehouseId { get; set; }
     [Range(0.0001, double.MaxValue)] public decimal Qty { get; set; }
     [Range(0, double.MaxValue)] public decimal UnitPrice { get; set; }

Backend/ERPCore/Dtos/Procurement/PurchaseReturnDtos.cs

@@ -9,12 +9,13 @@ public sealed record PurchaseReturnLineDto(int ReturnLineId, int? GrnLineId, int
 
 public sealed record PurchaseReturnDto(
     int ReturnId, string DocNo, int VendorId, int WarehouseId, int ReasonCodeId, ReturnStatus Status,
-    int CreatedBy, DateTime CreatedAt, IReadOnlyList<PurchaseReturnLineDto> Lines, IReadOnlyList<int> LedgerRefs);
+    int CreatedBy, DateTime CreatedAt, string? GlJournalNo, DateTime? GlPostedAt,
+    IReadOnlyList<PurchaseReturnLineDto> Lines, IReadOnlyList<int> LedgerRefs);
 
 /// <summary>Row shape for <c>GET /purchase-returns</c> — no lines/ledgerRefs (those need a per-row query).</summary>
 public sealed record PurchaseReturnSummaryDto(
     int ReturnId, string DocNo, int VendorId, int WarehouseId, int ReasonCodeId, ReturnStatus Status,
-    int CreatedBy, DateTime CreatedAt, int LineCount);
+    int CreatedBy, DateTime CreatedAt, int LineCount, string? GlJournalNo);
 
 // Requests ----------------------------------------------------------------------
 

Backend/ERPCore/Dtos/Production/RunDtos.cs

@@ -29,17 +29,23 @@ public sealed record RunSummaryDto(
 /// </summary>
 public sealed record CostPoolDto(decimal Consumed, decimal Returned, decimal Net);
 
+/// <summary>
+/// One input of a run stage. <c>PlannedQty</c> is expressed in <c>QtyUnit</c> — content
+/// (ml/g) or packs — while every consumption figure is always a pack count, so the two are
+/// not directly comparable for a Content input.
+/// </summary>
 public sealed record RunStageInputDto(
-    int RunInputId, StageInputSource Source, int? ItemId, int? FromRunOutputId, int UomId,
+    int RunInputId, StageInputSource Source, int? ItemId, int? FromRunOutputId, StageQtyUnit QtyUnit,
     decimal PlannedQty, decimal ConsumedQty, decimal ConsumedValue,
     decimal DeliveredQty, decimal ReturnedQty, decimal ReturnedValue);
 
 /// <summary>
 /// One output of a run stage. <c>AvailableToTransfer</c> is derived — produced − scrapped −
-/// transferred (FR-MFG-12) — and never stored.
+/// transferred (FR-MFG-12) — and never stored. <c>UomId</c> is the WIP label and is null on
+/// the terminal output, whose unit is the finished item's base UOM.
 /// </summary>
 public sealed record RunStageOutputDto(
-    int RunOutputId, int? ItemId, string Name, int UomId,
+    int RunOutputId, int? ItemId, string Name, int? UomId,
     decimal PlannedQty, decimal ProducedQty, decimal ScrappedQty, int? ScrapReasonCodeId,
     decimal TransferredQty, decimal AvailableToTransfer);
 

Backend/ERPCore/Dtos/Production/TemplateDtos.cs

@@ -35,10 +35,11 @@ public sealed record FieldDefDto(
 
 public sealed record StageInputDto(
     int InputId, StageInputSource Source, int? ItemId,
-    int? FromOutputId, string? FromOutputKey, int UomId, decimal QtyPerBatch);
+    int? FromOutputId, string? FromOutputKey, StageQtyUnit QtyUnit, decimal QtyPerBatch);
 
+/// <summary><c>UomId</c> is the WIP label and is null exactly when <c>ItemId</c> is set.</summary>
 public sealed record StageOutputDto(
-    int OutputId, string Key, int? ItemId, string Name, int UomId, decimal QtyPerBatch);
+    int OutputId, string Key, int? ItemId, string Name, int? UomId, decimal QtyPerBatch);
 
 public sealed record TemplateStageDto(
     int StageId, string Key, string Name, string? RoleLabel, int EstimatedMinutes,
@@ -134,8 +135,12 @@ public sealed class SaveInputRequest
     [StringLength(60)]
     public string? FromOutputKey { get; set; }
 
-    [Range(1, int.MaxValue)]
-    public int UomId { get; set; }
+    /// <summary>
+    /// What <see cref="QtyPerBatch"/> means. <c>Content</c> (ml/g) is allowed only on a Stock
+    /// input whose item has a content size; Upstream inputs must be <c>Pack</c>.
+    /// </summary>
+    [EnumDataType(typeof(StageQtyUnit))]
+    public StageQtyUnit QtyUnit { get; set; } = StageQtyUnit.Pack;
 
     [Range(0.0001, double.MaxValue)]
     public decimal QtyPerBatch { get; set; }
@@ -153,8 +158,12 @@ public sealed class SaveOutputRequest
     [Required, StringLength(150, MinimumLength = 1)]
     public string Name { get; set; } = string.Empty;
 
+    /// <summary>
+    /// The WIP display unit. Required when <see cref="ItemId"/> is null; must be null when it
+    /// is set, because a real item's unit is its own base UOM.
+    /// </summary>
     [Range(1, int.MaxValue)]
-    public int UomId { get; set; }
+    public int? UomId { get; set; }
 
     [Range(0.0001, double.MaxValue)]
     public decimal QtyPerBatch { get; set; }

Backend/ERPCore/Dtos/Sales/BundleSaleDtos.cs

@@ -0,0 +1,82 @@
+using System.ComponentModel.DataAnnotations;
+using ERPCore.Domain.Enums;
+
+namespace ERPCore.Dtos.Sales;
+
+public sealed record BundleSaleLineDto(
+    int BundleSaleLineId, int ItemId, string Description, decimal Qty, int WarehouseId,
+    decimal UnitPrice, decimal LineTotal, bool IncludeInBundle, bool IsComponent, int? ParentLineId);
+
+public sealed record BundleSaleDto(
+    int BundleSaleId, string BundleNo, DateTime BundleDate, int CustomerId, string CustomerSnapshotName,
+    int WarehouseId, int CashierUserId, int BundleSaleTemplateId, string BundleName, string BundleCode,
+    BundleSaleStatus Status, decimal ComponentSubtotal, decimal BundlePrice, decimal MarginAmount,
+    decimal DiscountTotal, decimal TaxTotal, decimal GrandTotal, DateTime CreatedAt, DateTime? UpdatedAt,
+    IReadOnlyList<BundleSaleLineDto> Lines);
+
+public sealed record BundleSaleSummaryDto(
+    int BundleSaleId, string BundleNo, DateTime BundleDate, int CustomerId, string CustomerSnapshotName,
+    int WarehouseId, string BundleName, string BundleCode, BundleSaleStatus Status,
+    decimal ComponentSubtotal, decimal BundlePrice, decimal GrandTotal, DateTime CreatedAt);
+
+public sealed record BundleSaleTemplateLineDto(
+    int BundleSaleTemplateLineId, int ItemId, int WarehouseId, decimal Qty,
+    decimal UnitPrice, bool IncludeInBundle, int SortOrder);
+
+public sealed record BundleSaleTemplateDto(
+    int BundleSaleTemplateId, string TemplateCode, string TemplateName, string? Description,
+    EntityStatus Status, DateTime CreatedAt, DateTime? UpdatedAt, IReadOnlyList<BundleSaleTemplateLineDto> Lines);
+
+public sealed record BundleSaleTemplateSummaryDto(
+    int BundleSaleTemplateId, string TemplateCode, string TemplateName, string? Description,
+    EntityStatus Status, int LineCount, DateTime CreatedAt, DateTime? UpdatedAt);
+
+public sealed record BundleSalePostingIssueDto(
+    int BundleSaleLineId, int ItemId, string ItemSku, string ItemName, int WarehouseId,
+    decimal RequestedQty, decimal AvailableQty, decimal ShortQty);
+
+public sealed record BundleSalePostingCheckDto(
+    int BundleSaleId, string BundleNo, BundleSaleStatus Status, bool CanPost,
+    IReadOnlyList<BundleSalePostingIssueDto> Issues);
+
+public sealed class CreateBundleSaleTemplateLineRequest
+{
+    [Required] public int ItemId { get; set; }
+    [Required] public int WarehouseId { get; set; }
+    [Range(0.0001, double.MaxValue)] public decimal Qty { get; set; }
+    [Range(0, double.MaxValue)] public decimal UnitPrice { get; set; }
+    public bool IncludeInBundle { get; set; } = true;
+    public int SortOrder { get; set; }
+}
+
+public sealed class CreateBundleSaleTemplateRequest
+{
+    [Required] public string TemplateCode { get; set; } = string.Empty;
+    [Required] public string TemplateName { get; set; } = string.Empty;
+    public string? Description { get; set; }
+    [Required, MinLength(1)] public List<CreateBundleSaleTemplateLineRequest> Lines { get; set; } = new();
+}
+
+public sealed class CreateBundleSaleRequest
+{
+    [Required] public int CustomerId { get; set; }
+    [Required] public int WarehouseId { get; set; }
+    [Required] public int CashierUserId { get; set; }
+    [Required] public int BundleSaleTemplateId { get; set; }
+    [Required] public string BundleName { get; set; } = string.Empty;
+    [Range(0, double.MaxValue)] public decimal BundlePrice { get; set; }
+    public bool AllowPriceOverride { get; set; }
+    [Required, MinLength(1)] public List<CreateBundleSaleTemplateLineRequest> Lines { get; set; } = new();
+}
+
+public sealed class UpdateBundleSaleRequest
+{
+    [Required] public int CustomerId { get; set; }
+    [Required] public int WarehouseId { get; set; }
+    [Required] public int CashierUserId { get; set; }
+    [Required] public int BundleSaleTemplateId { get; set; }
+    [Required] public string BundleName { get; set; } = string.Empty;
+    [Range(0, double.MaxValue)] public decimal BundlePrice { get; set; }
+    public bool AllowPriceOverride { get; set; }
+    [Required, MinLength(1)] public List<CreateBundleSaleTemplateLineRequest> Lines { get; set; } = new();
+}

Backend/ERPCore/Dtos/Sales/SalesDayEndDtos.cs

@@ -0,0 +1,40 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace ERPCore.Dtos.Sales;
+
+// Responses -----------------------------------------------------------------------
+
+/// <summary>Qty/revenue sold for one item across a closed (or about-to-close) day, for the day-end report.
+/// Merges sales-slip and bundle-sale lines for the same item into one row.</summary>
+public sealed record SalesDayEndItemLineDto(int ItemId, string Sku, string Name, decimal Qty, decimal Revenue);
+
+public sealed record SalesDayEndDto(
+    int SalesDayEndId, string DocNo, int CashierUserId, DateOnly BusinessDate,
+    int SlipCount, int BundleCount, decimal Subtotal, decimal DiscountTotal, decimal TaxTotal, decimal GrandTotal,
+    decimal CostOfGoodsSold, string? GlJournalNo, DateTime? GlPostedAt, int ClosedBy, DateTime ClosedAt,
+    IReadOnlyList<string> SlipNumbers, IReadOnlyList<string> BundleNumbers, IReadOnlyList<SalesDayEndItemLineDto> ItemBreakdown);
+
+public sealed record SalesDayEndSummaryDto(
+    int SalesDayEndId, string DocNo, int CashierUserId, DateOnly BusinessDate,
+    int SlipCount, int BundleCount, decimal GrandTotal, string? GlJournalNo, DateTime ClosedAt);
+
+/// <summary>What closing right now would include — call before <c>POST /sales-day-end</c> so the
+/// cashier can see the day's totals, and any still-Draft slips/bundles blocking the close.</summary>
+public sealed record SalesDayEndPreviewDto(
+    int CashierUserId, DateOnly BusinessDate, bool AlreadyClosed,
+    int SlipCount, int BundleCount, decimal Subtotal, decimal DiscountTotal, decimal TaxTotal, decimal GrandTotal,
+    IReadOnlyList<string> SlipNumbers, IReadOnlyList<string> BundleNumbers,
+    IReadOnlyList<DraftSlipBlockingCloseDto> DraftSlipsBlockingClose,
+    IReadOnlyList<DraftBundleBlockingCloseDto> DraftBundleSalesBlockingClose);
+
+public sealed record DraftSlipBlockingCloseDto(int SalesSlipId, string SlipNo, decimal GrandTotal);
+public sealed record DraftBundleBlockingCloseDto(int BundleSaleId, string BundleNo, decimal GrandTotal);
+
+// Requests ------------------------------------------------------------------------
+
+public sealed class CreateSalesDayEndRequest
+{
+    [Required] public int CashierUserId { get; set; }
+    /// <summary>Defaults to today (UTC) when omitted.</summary>
+    public DateOnly? BusinessDate { get; set; }
+}

Backend/ERPCore/Dtos/Sales/SalesInvoiceDtos.cs

@@ -4,7 +4,7 @@ using ERPCore.Domain.Enums;
 namespace ERPCore.Dtos.Sales;
 
 public sealed record SalesInvoiceLineDto(
-    int SalesInvoiceLineId, int ItemId, string Description, decimal Qty, decimal FreeQty, int UomId,
+    int SalesInvoiceLineId, int ItemId, string Description, decimal Qty, decimal FreeQty,
     int WarehouseId, decimal UnitPrice, decimal BaseCost, string PriceSource, decimal DiscountPct,
     decimal DiscountAmount, SalesDiscountMode DiscountMode, decimal NetUnitPrice, decimal LineTotal,
     decimal TaxPct, decimal TaxAmount, bool IsFreeIssue, int? ParentLineId);
@@ -17,12 +17,24 @@ public sealed record SalesInvoiceDto(
     int SalesInvoiceId, string InvoiceNo, DateTime InvoiceDate, int CustomerId,
     string CustomerSnapshotName, string? CustomerSnapshotTaxNo, int WarehouseId,
     SalesInvoiceType InvoiceType, SalesInvoiceStatus Status, int CreatedBy, DateTime CreatedAt,
-    DateTime? UpdatedAt, SalesInvoiceTotalsDto Totals, IReadOnlyList<SalesInvoiceLineDto> Lines);
+    DateTime? UpdatedAt, string? GlJournalNo, DateTime? GlPostedAt,
+    SalesInvoiceTotalsDto Totals, IReadOnlyList<SalesInvoiceLineDto> Lines);
 
 public sealed record SalesInvoiceSummaryDto(
     int SalesInvoiceId, string InvoiceNo, DateTime InvoiceDate, int CustomerId,
     string CustomerSnapshotName, int WarehouseId, SalesInvoiceType InvoiceType,
-    SalesInvoiceStatus Status, SalesInvoiceTotalsDto Totals, DateTime CreatedAt);
+    SalesInvoiceStatus Status, SalesInvoiceTotalsDto Totals, DateTime CreatedAt, string? GlJournalNo);
+
+public sealed record SalesInvoicePaymentDto(
+    int SalesInvoicePaymentId, int SalesInvoiceId, decimal Amount, DateTime PaymentDate,
+    long GlBankAccountId, string BankAccountName, string? Reference, string? GlJournalNo, DateTime CreatedAt);
+
+public sealed class CreateSalesInvoicePaymentRequest
+{
+    [Range(0.01, double.MaxValue)] public decimal Amount { get; set; }
+    [Required] public long GlBankAccountId { get; set; }
+    [StringLength(100)] public string? Reference { get; set; }
+}
 
 public sealed record SalesInvoicePostingIssueDto(
     int SalesInvoiceLineId, int ItemId, string ItemSku, string ItemName, int WarehouseId,
@@ -35,7 +47,6 @@ public sealed record SalesInvoicePostingCheckDto(
 public sealed class CreateSalesInvoiceLineRequest
 {
     [Required] public int ItemId { get; set; }
-    [Required] public int UomId { get; set; }
     [Required] public int WarehouseId { get; set; }
     [Range(0.0001, double.MaxValue)] public decimal Qty { get; set; }
     [Range(0, double.MaxValue)] public decimal FreeQty { get; set; }

Backend/ERPCore/Dtos/Sales/SalesReturnDtos.cs

@@ -0,0 +1,44 @@
+using System.ComponentModel.DataAnnotations;
+using ERPCore.Domain.Enums;
+
+namespace ERPCore.Dtos.Sales;
+
+// Responses -----------------------------------------------------------------
+
+public sealed record SalesReturnLineDto(int ReturnLineId, int? SalesInvoiceLineId, int ItemId, decimal Qty);
+
+public sealed record SalesReturnDto(
+    int ReturnId, string DocNo, int CustomerId, int WarehouseId, int ReasonCodeId, ReturnStatus Status,
+    int CreatedBy, DateTime CreatedAt, string? GlJournalNo, DateTime? GlPostedAt,
+    IReadOnlyList<SalesReturnLineDto> Lines, IReadOnlyList<int> LedgerRefs);
+
+/// <summary>Row shape for <c>GET /sales-returns</c> — no lines/ledgerRefs (those need a per-row query).</summary>
+public sealed record SalesReturnSummaryDto(
+    int ReturnId, string DocNo, int CustomerId, int WarehouseId, int ReasonCodeId, ReturnStatus Status,
+    int CreatedBy, DateTime CreatedAt, int LineCount, decimal TotalQty, string? GlJournalNo);
+
+/// <summary>
+/// Remaining returnable qty for one sales invoice line — the invoiced qty minus
+/// whatever has already been returned against it. The invoice line's own <c>Qty</c>
+/// is never mutated by a return, so this is computed on read from return history.
+/// </summary>
+public sealed record SalesInvoiceLineRemainingDto(int SalesInvoiceLineId, decimal RemainingQty);
+
+// Requests --------------------------------------------------------------------
+
+public sealed class CreateSalesReturnLineInput
+{
+    /// <summary>Original sales invoice line, for traceability against the sale.</summary>
+    public int? SalesInvoiceLineId { get; set; }
+    [Required] public int ItemId { get; set; }
+    [Range(0.0001, double.MaxValue)] public decimal Qty { get; set; }
+}
+
+public sealed class CreateSalesReturnRequest
+{
+    [Required] public int CustomerId { get; set; }
+    [Required] public int WarehouseId { get; set; }
+    /// <summary>Nullable so an omitted value is a distinct <c>REASON_CODE_REQUIRED</c> error.</summary>
+    public int? ReasonCodeId { get; set; }
+    [Required, MinLength(1)] public List<CreateSalesReturnLineInput> Lines { get; set; } = new();
+}

Backend/ERPCore/Dtos/Sales/SalesSlipDtos.cs

@@ -4,7 +4,7 @@ using ERPCore.Domain.Enums;
 namespace ERPCore.Dtos.Sales;
 
 public sealed record SalesSlipLineDto(
-    int SalesSlipLineId, int ItemId, string Description, decimal Qty, decimal FreeQty, int UomId,
+    int SalesSlipLineId, int ItemId, string Description, decimal Qty, decimal FreeQty,
     int WarehouseId, decimal UnitPrice, decimal BaseCost, string PriceSource, decimal DiscountPct,
     decimal DiscountAmount, SalesDiscountMode DiscountMode, decimal NetUnitPrice, decimal LineTotal,
     decimal TaxPct, decimal TaxAmount, bool IsFreeIssue, int? ParentLineId);
@@ -34,7 +34,7 @@ public sealed record SalesSlipPostingCheckDto(
 public sealed record FreeIssueSummaryDto(
     int SalesSlipId, string SlipNo, SalesSlipStatus Status, DateTime CreatedAt,
     int WarehouseId, string WarehouseName, int ItemId, string ItemSku, string ItemName,
-    int UomId, string UomName, decimal Qty, decimal FreeQty, string SchemeLabel);
+    string UomName, decimal Qty, decimal FreeQty, string SchemeLabel);
 
 public sealed record FreeIssueDto(
     int SalesSlipId, string SlipNo, DateTime SlipDate, SalesSlipStatus Status,
@@ -45,7 +45,6 @@ public sealed record FreeIssueDto(
 public sealed class CreateSalesSlipLineRequest
 {
     [Required] public int ItemId { get; set; }
-    [Required] public int UomId { get; set; }
     [Required] public int WarehouseId { get; set; }
     [Range(0.0001, double.MaxValue)] public decimal Qty { get; set; }
     [Range(0, double.MaxValue)] public decimal FreeQty { get; set; }

Backend/ERPCore/Dtos/Stock/AdjustmentDtos.cs

@@ -9,12 +9,13 @@ public sealed record AdjustmentLineDto(int AdjLineId, int ItemId, int? BinId, in
 
 public sealed record AdjustmentDto(
     int AdjustmentId, string DocNo, int WarehouseId, int ReasonCodeId, AdjustmentStatus Status,
-    int CreatedBy, DateTime CreatedAt, IReadOnlyList<AdjustmentLineDto> Lines, IReadOnlyList<int> LedgerRefs);
+    int CreatedBy, DateTime CreatedAt, string? GlJournalNo, DateTime? GlPostedAt,
+    IReadOnlyList<AdjustmentLineDto> Lines, IReadOnlyList<int> LedgerRefs);
 
 /// <summary>Row shape for <c>GET /stock-adjustments</c> — no lines/ledgerRefs (those need a per-row query).</summary>
 public sealed record AdjustmentSummaryDto(
     int AdjustmentId, string DocNo, int WarehouseId, int ReasonCodeId, AdjustmentStatus Status,
-    int CreatedBy, DateTime CreatedAt, int LineCount);
+    int CreatedBy, DateTime CreatedAt, int LineCount, string? GlJournalNo);
 
 // Requests ----------------------------------------------------------------------
 

Backend/ERPCore/Dtos/Stock/CountDtos.cs

@@ -16,7 +16,7 @@ public sealed record CountSummaryDto(
     int CountId, string DocNo, int WarehouseId, CountType CountType, CountStatus Status,
     int CreatedBy, DateTime CreatedAt, int LineCount);
 
-public sealed record CountPostResultDto(int CountId, CountStatus Status, int? AdjustmentId, IReadOnlyList<int> LedgerRefs);
+public sealed record CountPostResultDto(int CountId, CountStatus Status, int? AdjustmentId, string? GlJournalNo, IReadOnlyList<int> LedgerRefs);
 
 // Requests ----------------------------------------------------------------------
 

Backend/ERPCore/Infra/Persistence/Configurations/BundleSaleConfiguration.cs

@@ -0,0 +1,46 @@
+using ERPCore.Domain.Entities;
+using ERPCore.Domain.Enums;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Metadata.Builders;
+
+namespace ERPCore.Infra.Persistence.Configurations;
+
+public sealed class BundleSaleConfiguration : IEntityTypeConfiguration<BundleSale>
+{
+    public void Configure(EntityTypeBuilder<BundleSale> builder)
+    {
+        builder.ToTable("bundle_sales");
+        builder.HasKey(x => x.BundleSaleId);
+        builder.Property(x => x.BundleNo).IsRequired().HasMaxLength(50);
+        builder.HasIndex(x => x.BundleNo).IsUnique();
+        builder.Property(x => x.BundleDate).IsRequired();
+        builder.Property(x => x.CustomerSnapshotName).IsRequired().HasMaxLength(200);
+        builder.Property(x => x.BundleName).IsRequired().HasMaxLength(200);
+        builder.Property(x => x.BundleCode).IsRequired().HasMaxLength(50);
+        builder.Property(x => x.Status)
+            .HasConversion<string>().HasMaxLength(20).IsRequired()
+            .HasDefaultValue(BundleSaleStatus.Draft);
+        builder.Property(x => x.ComponentSubtotal).HasPrecision(18, 4);
+        builder.Property(x => x.BundlePrice).HasPrecision(18, 4);
+        builder.Property(x => x.MarginAmount).HasPrecision(18, 4);
+        builder.Property(x => x.DiscountTotal).HasPrecision(18, 4);
+        builder.Property(x => x.TaxTotal).HasPrecision(18, 4);
+        builder.Property(x => x.GrandTotal).HasPrecision(18, 4);
+        builder.Property(x => x.CreatedAt).IsRequired();
+        builder.Property(x => x.ConcurrencyStamp)
+            .IsRequired()
+            .HasColumnType("integer")
+            .HasDefaultValue(0)
+            .IsConcurrencyToken();
+
+        builder.HasOne(x => x.Customer).WithMany().HasForeignKey(x => x.CustomerId).OnDelete(DeleteBehavior.Restrict);
+        builder.HasOne(x => x.Warehouse).WithMany().HasForeignKey(x => x.WarehouseId).OnDelete(DeleteBehavior.Restrict);
+        builder.HasOne(x => x.CashierUser).WithMany().HasForeignKey(x => x.CashierUserId).OnDelete(DeleteBehavior.Restrict);
+        builder.HasOne(x => x.BundleSaleTemplate).WithMany().HasForeignKey(x => x.BundleSaleTemplateId).OnDelete(DeleteBehavior.Restrict);
+
+        builder.HasMany(x => x.Lines)
+            .WithOne(x => x.BundleSale)
+            .HasForeignKey(x => x.BundleSaleId)
+            .OnDelete(DeleteBehavior.Cascade);
+    }
+}

Backend/ERPCore/Infra/Persistence/Configurations/BundleSaleLineConfiguration.cs

@@ -0,0 +1,23 @@
+using ERPCore.Domain.Entities;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Metadata.Builders;
+
+namespace ERPCore.Infra.Persistence.Configurations;
+
+public sealed class BundleSaleLineConfiguration : IEntityTypeConfiguration<BundleSaleLine>
+{
+    public void Configure(EntityTypeBuilder<BundleSaleLine> builder)
+    {
+        builder.ToTable("bundle_sale_lines");
+        builder.HasKey(x => x.BundleSaleLineId);
+        builder.Property(x => x.Description).IsRequired().HasMaxLength(200);
+        builder.Property(x => x.Qty).HasPrecision(18, 4);
+        builder.Property(x => x.UnitPrice).HasPrecision(18, 4);
+        builder.Property(x => x.LineTotal).HasPrecision(18, 4);
+        builder.Property(x => x.IncludeInBundle).HasDefaultValue(true);
+        builder.Property(x => x.IsComponent).HasDefaultValue(true);
+
+        builder.HasOne(x => x.Item).WithMany().HasForeignKey(x => x.ItemId).OnDelete(DeleteBehavior.Restrict);
+        builder.HasOne(x => x.Warehouse).WithMany().HasForeignKey(x => x.WarehouseId).OnDelete(DeleteBehavior.Restrict);
+    }
+}

Backend/ERPCore/Infra/Persistence/Configurations/BundleSaleTemplateConfiguration.cs

@@ -0,0 +1,34 @@
+using ERPCore.Domain.Entities;
+using ERPCore.Domain.Enums;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Metadata.Builders;
+
+namespace ERPCore.Infra.Persistence.Configurations;
+
+public sealed class BundleSaleTemplateConfiguration : IEntityTypeConfiguration<BundleSaleTemplate>
+{
+    public void Configure(EntityTypeBuilder<BundleSaleTemplate> builder)
+    {
+        builder.ToTable("bundle_sale_templates");
+        builder.HasKey(x => x.BundleSaleTemplateId);
+
+        builder.Property(x => x.TemplateCode).IsRequired().HasMaxLength(50);
+        builder.HasIndex(x => x.TemplateCode).IsUnique();
+        builder.Property(x => x.TemplateName).IsRequired().HasMaxLength(200);
+        builder.Property(x => x.Description).HasMaxLength(1000);
+        builder.Property(x => x.Status)
+            .HasConversion<string>().HasMaxLength(20).IsRequired()
+            .HasDefaultValue(EntityStatus.Active);
+        builder.Property(x => x.CreatedAt).IsRequired();
+        builder.Property(x => x.ConcurrencyStamp)
+            .IsRequired()
+            .HasColumnType("integer")
+            .HasDefaultValue(0)
+            .IsConcurrencyToken();
+
+        builder.HasMany(x => x.Lines)
+            .WithOne(x => x.BundleSaleTemplate)
+            .HasForeignKey(x => x.BundleSaleTemplateId)
+            .OnDelete(DeleteBehavior.Cascade);
+    }
+}

Backend/ERPCore/Infra/Persistence/Configurations/BundleSaleTemplateLineConfiguration.cs

@@ -0,0 +1,20 @@
+using ERPCore.Domain.Entities;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Metadata.Builders;
+
+namespace ERPCore.Infra.Persistence.Configurations;
+
+public sealed class BundleSaleTemplateLineConfiguration : IEntityTypeConfiguration<BundleSaleTemplateLine>
+{
+    public void Configure(EntityTypeBuilder<BundleSaleTemplateLine> builder)
+    {
+        builder.ToTable("bundle_sale_template_lines");
+        builder.HasKey(x => x.BundleSaleTemplateLineId);
+        builder.Property(x => x.Qty).HasPrecision(18, 4);
+        builder.Property(x => x.UnitPrice).HasPrecision(18, 4);
+        builder.Property(x => x.SortOrder).HasDefaultValue(0);
+
+        builder.HasOne(x => x.Item).WithMany().HasForeignKey(x => x.ItemId).OnDelete(DeleteBehavior.Restrict);
+        builder.HasOne(x => x.Warehouse).WithMany().HasForeignKey(x => x.WarehouseId).OnDelete(DeleteBehavior.Restrict);
+    }
+}

Backend/ERPCore/Infra/Persistence/Configurations/GrnConfiguration.cs

@@ -16,6 +16,9 @@ public sealed class GrnConfiguration : IEntityTypeConfiguration<Grn>
 
         builder.Property(g => g.Status).HasConversion<string>().HasMaxLength(20).IsRequired();
         builder.Property(g => g.CreatedAt).IsRequired();
+        builder.Property(g => g.GlJournalNo).HasMaxLength(30);
+        builder.Property(g => g.PaidAmount).HasPrecision(18, 4);
+        builder.Property(g => g.BalanceAmount).HasPrecision(18, 4);
         builder.Property(g => g.RowVersion).IsRowVersion();
 
         builder.HasOne(g => g.PurchaseOrder).WithMany().HasForeignKey(g => g.PoId).OnDelete(DeleteBehavior.Restrict);
@@ -28,6 +31,27 @@ public sealed class GrnConfiguration : IEntityTypeConfiguration<Grn>
     }
 }
 
+public sealed class GrnPaymentConfiguration : IEntityTypeConfiguration<GrnPayment>
+{
+    public void Configure(EntityTypeBuilder<GrnPayment> builder)
+    {
+        builder.ToTable("grn_payments");
+        builder.HasKey(p => p.GrnPaymentId);
+
+        builder.Property(p => p.Amount).HasPrecision(18, 4);
+        builder.Property(p => p.PaymentDate).IsRequired();
+        builder.Property(p => p.BankAccountName).IsRequired().HasMaxLength(200);
+        builder.Property(p => p.Reference).HasMaxLength(100);
+        builder.Property(p => p.GlJournalNo).HasMaxLength(30);
+        builder.Property(p => p.CreatedAt).IsRequired();
+
+        builder.HasOne(p => p.Grn).WithMany(g => g.Payments).HasForeignKey(p => p.GrnId).OnDelete(DeleteBehavior.Restrict);
+        builder.HasOne(p => p.Creator).WithMany().HasForeignKey(p => p.CreatedBy).OnDelete(DeleteBehavior.Restrict);
+
+        builder.HasIndex(p => p.GrnId);
+    }
+}
+
 public sealed class GrnLineConfiguration : IEntityTypeConfiguration<GrnLine>
 {
     public void Configure(EntityTypeBuilder<GrnLine> builder)
@@ -49,8 +73,25 @@ public sealed class GrnLineConfiguration : IEntityTypeConfiguration<GrnLine>
         builder.HasOne(l => l.Grn).WithMany(g => g.Lines).HasForeignKey(l => l.GrnId).OnDelete(DeleteBehavior.Cascade);
         builder.HasOne(l => l.PoLine).WithMany().HasForeignKey(l => l.PoLineId).OnDelete(DeleteBehavior.Restrict);
         builder.HasOne(l => l.Item).WithMany().HasForeignKey(l => l.ItemId).OnDelete(DeleteBehavior.Restrict);
-        builder.HasOne(l => l.Uom).WithMany().HasForeignKey(l => l.UomId).OnDelete(DeleteBehavior.Restrict);
         builder.HasOne(l => l.Bin).WithMany().HasForeignKey(l => l.BinId).OnDelete(DeleteBehavior.Restrict);
         builder.HasOne(l => l.Batch).WithMany().HasForeignKey(l => l.BatchId).OnDelete(DeleteBehavior.Restrict);
     }
 }
+
+public sealed class GrnLineWarrantyNumberConfiguration : IEntityTypeConfiguration<GrnLineWarrantyNumber>
+{
+    public void Configure(EntityTypeBuilder<GrnLineWarrantyNumber> builder)
+    {
+        builder.ToTable("grn_line_warranty_numbers");
+        builder.HasKey(w => w.GrnLineWarrantyNumberId);
+
+        builder.Property(w => w.WarrantyNo).IsRequired().HasMaxLength(100);
+
+        builder.HasOne(w => w.GrnLine).WithMany(l => l.WarrantyNumbers)
+            .HasForeignKey(w => w.GrnLineId).OnDelete(DeleteBehavior.Cascade);
+
+        // A warranty number entered twice on the same line is almost certainly a typo —
+        // catch it at the DB, not just client-side.
+        builder.HasIndex(w => new { w.GrnLineId, w.WarrantyNo }).IsUnique();
+    }
+}

Backend/ERPCore/Infra/Persistence/Configurations/ItemConfiguration.cs

@@ -22,10 +22,23 @@ public sealed class ItemConfiguration : IEntityTypeConfiguration<Item>
         // Sales-only fixed selling price; nullable (null ⇒ sell at stock/FIFO value).
         builder.Property(i => i.SalePrice).HasPrecision(18, 4);
 
+        // Optional content size (how much one stocked pack holds). All four are nullable
+        // together: null ⇒ the item has no measurable content. The base pair is derived
+        // server-side by ItemContent.Normalize and is only ever Ml or G.
+        builder.Property(i => i.ContentQty).HasPrecision(18, 4);
+        builder.Property(i => i.ContentBaseQty).HasPrecision(18, 4);
+        builder.Property(i => i.ContentUnit)
+            .HasConversion<string>().HasMaxLength(20);
+        builder.Property(i => i.ContentBaseUnit)
+            .HasConversion<string>().HasMaxLength(20);
+
         builder.Property(i => i.StockNature)
             .HasConversion<string>().HasMaxLength(20).IsRequired();
         builder.Property(i => i.TrackingMode)
             .HasConversion<string>().HasMaxLength(20).IsRequired();
+        builder.Property(i => i.Warranty)
+            .HasConversion<string>().HasMaxLength(20).IsRequired()
+            .HasDefaultValue(Warranty.NonWarranty);
         builder.Property(i => i.Status)
             .HasConversion<string>().HasMaxLength(20).IsRequired()
             .HasDefaultValue(EntityStatus.Active);

Backend/ERPCore/Infra/Persistence/Configurations/ItemTypeConfiguration.cs

@@ -19,6 +19,11 @@ public sealed class ItemTypeConfiguration : IEntityTypeConfiguration<ItemType>
         builder.Property(t => t.Name).IsRequired().HasMaxLength(200);
         builder.HasIndex(t => t.Name).IsUnique();
 
+        // false is the only safe default here: EF uses the CLR default as its "unset" sentinel,
+        // so if the store default were true, inserting an explicit false would be mistaken for
+        // "not set" and silently written as true. Sentinel and store default must agree.
+        builder.Property(t => t.IsMeasurable).IsRequired().HasDefaultValue(false);
+
         builder.Property(t => t.Status)
             .HasConversion<string>().HasMaxLength(20).IsRequired()
             .HasDefaultValue(EntityStatus.Active);

Backend/ERPCore/Infra/Persistence/Configurations/NavItemConfiguration.cs

@@ -38,7 +38,8 @@ public sealed class NavItemConfiguration : IEntityTypeConfiguration<NavItem>
             new NavItem { NavItemId = 9, Code = "settings", Label = "Settings", Href = "/dashboard/settings", SortOrder = 9 },
             new NavItem { NavItemId = 10, Code = "help", Label = "Help", Href = "/dashboard/help", SortOrder = 10 },
             new NavItem { NavItemId = 11, Code = "ledgers", Label = "Ledgers", Href = "/dashboard/ledgers", SortOrder = 11 },
-            new NavItem { NavItemId = 12, Code = "accounts", Label = "Accounts", Href = "/dashboard/accounts", SortOrder = 12 }
+            new NavItem { NavItemId = 12, Code = "accounts", Label = "Accounts", Href = "/dashboard/accounts", SortOrder = 12 },
+            new NavItem { NavItemId = 13, Code = "sales", Label = "Sales", Href = "/dashboard/sales", SortOrder = 13 }
         );
     }
 }

Backend/ERPCore/Infra/Persistence/Configurations/ProductionConfiguration.cs

@@ -91,13 +91,13 @@ public sealed class StageInputConfiguration : IEntityTypeConfiguration<StageInpu
         builder.HasKey(i => i.InputId);
 
         builder.Property(i => i.Source).HasConversion<string>().HasMaxLength(20).IsRequired();
+        builder.Property(i => i.QtyUnit).HasConversion<string>().HasMaxLength(20).IsRequired();
         builder.Property(i => i.QtyPerBatch).HasPrecision(18, 4);
 
         builder.HasOne(i => i.Stage).WithMany(s => s.Inputs)
             .HasForeignKey(i => i.StageId).OnDelete(DeleteBehavior.Cascade);
 
         builder.HasOne(i => i.Item).WithMany().HasForeignKey(i => i.ItemId).OnDelete(DeleteBehavior.Restrict);
-        builder.HasOne(i => i.Uom).WithMany().HasForeignKey(i => i.UomId).OnDelete(DeleteBehavior.Restrict);
         builder.HasOne(i => i.FromOutput).WithMany()
             .HasForeignKey(i => i.FromOutputId).OnDelete(DeleteBehavior.Restrict);
     }
@@ -206,6 +206,7 @@ public sealed class RunStageInputConfiguration : IEntityTypeConfiguration<RunSta
         builder.HasKey(i => i.RunInputId);
 
         builder.Property(i => i.Source).HasConversion<string>().HasMaxLength(20).IsRequired();
+        builder.Property(i => i.QtyUnit).HasConversion<string>().HasMaxLength(20).IsRequired();
         builder.Property(i => i.PlannedQty).HasPrecision(18, 4);
         builder.Property(i => i.ConsumedQty).HasPrecision(18, 4);
         builder.Property(i => i.ConsumedValue).HasPrecision(18, 4);
@@ -217,7 +218,6 @@ public sealed class RunStageInputConfiguration : IEntityTypeConfiguration<RunSta
             .HasForeignKey(i => i.RunStageId).OnDelete(DeleteBehavior.Cascade);
 
         builder.HasOne(i => i.Item).WithMany().HasForeignKey(i => i.ItemId).OnDelete(DeleteBehavior.Restrict);
-        builder.HasOne(i => i.Uom).WithMany().HasForeignKey(i => i.UomId).OnDelete(DeleteBehavior.Restrict);
         builder.HasOne(i => i.FromRunOutput).WithMany()
             .HasForeignKey(i => i.FromRunOutputId).OnDelete(DeleteBehavior.Restrict);
 

Backend/ERPCore/Infra/Persistence/Configurations/PurchaseOrderConfiguration.cs

@@ -63,11 +63,6 @@ public sealed class PoLineConfiguration : IEntityTypeConfiguration<PoLine>
             .HasForeignKey(l => l.ItemId)
             .OnDelete(DeleteBehavior.Restrict);
 
-        builder.HasOne(l => l.Uom)
-            .WithMany()
-            .HasForeignKey(l => l.UomId)
-            .OnDelete(DeleteBehavior.Restrict);
-
         builder.HasOne(l => l.Warehouse)
             .WithMany()
             .HasForeignKey(l => l.WarehouseId)

Backend/ERPCore/Infra/Persistence/Configurations/PurchaseReturnConfiguration.cs

@@ -16,6 +16,7 @@ public sealed class PurchaseReturnConfiguration : IEntityTypeConfiguration<Purch
 
         builder.Property(r => r.Status).HasConversion<string>().HasMaxLength(20).IsRequired();
         builder.Property(r => r.CreatedAt).IsRequired();
+        builder.Property(r => r.GlJournalNo).HasMaxLength(30);
 
         builder.HasOne(r => r.Vendor).WithMany().HasForeignKey(r => r.VendorId).OnDelete(DeleteBehavior.Restrict);
         builder.HasOne(r => r.Warehouse).WithMany().HasForeignKey(r => r.WarehouseId).OnDelete(DeleteBehavior.Restrict);

Backend/ERPCore/Infra/Persistence/Configurations/SalesDayEndConfiguration.cs

@@ -0,0 +1,44 @@
+using ERPCore.Domain.Entities;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Metadata.Builders;
+
+namespace ERPCore.Infra.Persistence.Configurations;
+
+public sealed class SalesDayEndConfiguration : IEntityTypeConfiguration<SalesDayEnd>
+{
+    public void Configure(EntityTypeBuilder<SalesDayEnd> builder)
+    {
+        builder.ToTable("sales_day_ends");
+        builder.HasKey(x => x.SalesDayEndId);
+
+        builder.Property(x => x.DocNo).IsRequired().HasMaxLength(30);
+        builder.HasIndex(x => x.DocNo).IsUnique();
+
+        builder.Property(x => x.BusinessDate).IsRequired();
+
+        foreach (var p in new[] { nameof(SalesDayEnd.Subtotal), nameof(SalesDayEnd.DiscountTotal), nameof(SalesDayEnd.TaxTotal), nameof(SalesDayEnd.GrandTotal), nameof(SalesDayEnd.CostOfGoodsSold) })
+            builder.Property<decimal>(p).HasPrecision(18, 4);
+        builder.Property(x => x.BundleCount).HasDefaultValue(0);
+
+        builder.Property(x => x.GlJournalNo).HasMaxLength(30);
+        builder.Property(x => x.ClosedAt).IsRequired();
+        builder.Property(x => x.RowVersion).IsRowVersion();
+
+        builder.HasOne(x => x.CashierUser).WithMany().HasForeignKey(x => x.CashierUserId).OnDelete(DeleteBehavior.Restrict);
+        builder.HasOne(x => x.ClosedByUser).WithMany().HasForeignKey(x => x.ClosedBy).OnDelete(DeleteBehavior.Restrict);
+
+        // A cashier can only close a given business date once (CloseAsync replays this
+        // row idempotently on a second call instead of erroring — see SalesDayEndService).
+        builder.HasIndex(x => new { x.CashierUserId, x.BusinessDate }).IsUnique();
+
+        builder.HasMany(x => x.Slips)
+            .WithOne(x => x.DayEnd)
+            .HasForeignKey(x => x.DayEndId)
+            .OnDelete(DeleteBehavior.Restrict);
+
+        builder.HasMany(x => x.BundleSales)
+            .WithOne(x => x.DayEnd)
+            .HasForeignKey(x => x.DayEndId)
+            .OnDelete(DeleteBehavior.Restrict);
+    }
+}

Backend/ERPCore/Infra/Persistence/Configurations/SalesInvoiceConfiguration.cs

@@ -40,6 +40,7 @@ public sealed class SalesInvoiceConfiguration : IEntityTypeConfiguration<SalesIn
 
         foreach (var p in new[] { nameof(SalesInvoice.Subtotal), nameof(SalesInvoice.DiscountTotal), nameof(SalesInvoice.TaxTotal), nameof(SalesInvoice.GrandTotal), nameof(SalesInvoice.RoundOff), nameof(SalesInvoice.NetPayable), nameof(SalesInvoice.PaidAmount), nameof(SalesInvoice.BalanceAmount) })
             builder.Property<decimal>(p).HasPrecision(18, 4);
+        builder.Property(x => x.GlJournalNo).HasMaxLength(30);
 
         builder.Property(x => x.CreatedAt).IsRequired();
         builder.Property(x => x.RowVersion).IsRowVersion();
@@ -54,6 +55,27 @@ public sealed class SalesInvoiceConfiguration : IEntityTypeConfiguration<SalesIn
     }
 }
 
+public sealed class SalesInvoicePaymentConfiguration : IEntityTypeConfiguration<SalesInvoicePayment>
+{
+    public void Configure(EntityTypeBuilder<SalesInvoicePayment> builder)
+    {
+        builder.ToTable("sales_invoice_payments");
+        builder.HasKey(p => p.SalesInvoicePaymentId);
+
+        builder.Property(p => p.Amount).HasPrecision(18, 4);
+        builder.Property(p => p.PaymentDate).IsRequired();
+        builder.Property(p => p.BankAccountName).IsRequired().HasMaxLength(200);
+        builder.Property(p => p.Reference).HasMaxLength(100);
+        builder.Property(p => p.GlJournalNo).HasMaxLength(30);
+        builder.Property(p => p.CreatedAt).IsRequired();
+
+        builder.HasOne(p => p.SalesInvoice).WithMany(x => x.Payments).HasForeignKey(p => p.SalesInvoiceId).OnDelete(DeleteBehavior.Restrict);
+        builder.HasOne(p => p.Creator).WithMany().HasForeignKey(p => p.CreatedBy).OnDelete(DeleteBehavior.Restrict);
+
+        builder.HasIndex(p => p.SalesInvoiceId);
+    }
+}
+
 public sealed class SalesInvoiceLineConfiguration : IEntityTypeConfiguration<SalesInvoiceLine>
 {
     public void Configure(EntityTypeBuilder<SalesInvoiceLine> builder)
@@ -79,11 +101,6 @@ public sealed class SalesInvoiceLineConfiguration : IEntityTypeConfiguration<Sal
         builder.Property(x => x.TaxPct).HasPrecision(9, 4);
         builder.Property(x => x.TaxAmount).HasPrecision(18, 4);
 
-        builder.HasOne(x => x.Uom)
-            .WithMany()
-            .HasForeignKey(x => x.UomId)
-            .OnDelete(DeleteBehavior.Restrict);
-
         builder.HasOne(x => x.Warehouse)
             .WithMany()
             .HasForeignKey(x => x.WarehouseId)

Backend/ERPCore/Infra/Persistence/Configurations/SalesReturnConfiguration.cs

@@ -0,0 +1,41 @@
+using ERPCore.Domain.Entities;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Metadata.Builders;
+
+namespace ERPCore.Infra.Persistence.Configurations;
+
+public sealed class SalesReturnConfiguration : IEntityTypeConfiguration<SalesReturn>
+{
+    public void Configure(EntityTypeBuilder<SalesReturn> builder)
+    {
+        builder.ToTable("sales_returns");
+        builder.HasKey(r => r.ReturnId);
+
+        builder.Property(r => r.DocNo).IsRequired().HasMaxLength(30);
+        builder.HasIndex(r => r.DocNo).IsUnique();
+
+        builder.Property(r => r.Status).HasConversion<string>().HasMaxLength(20).IsRequired();
+        builder.Property(r => r.CreatedAt).IsRequired();
+        builder.Property(r => r.GlJournalNo).HasMaxLength(30);
+
+        builder.HasOne(r => r.Customer).WithMany().HasForeignKey(r => r.CustomerId).OnDelete(DeleteBehavior.Restrict);
+        builder.HasOne(r => r.Warehouse).WithMany().HasForeignKey(r => r.WarehouseId).OnDelete(DeleteBehavior.Restrict);
+        builder.HasOne(r => r.ReasonCode).WithMany().HasForeignKey(r => r.ReasonCodeId).OnDelete(DeleteBehavior.Restrict);
+        builder.HasOne(r => r.Creator).WithMany().HasForeignKey(r => r.CreatedBy).OnDelete(DeleteBehavior.Restrict);
+    }
+}
+
+public sealed class SalesReturnLineConfiguration : IEntityTypeConfiguration<SalesReturnLine>
+{
+    public void Configure(EntityTypeBuilder<SalesReturnLine> builder)
+    {
+        builder.ToTable("sales_return_lines");
+        builder.HasKey(l => l.ReturnLineId);
+
+        builder.Property(l => l.Qty).HasPrecision(18, 4);
+
+        builder.HasOne(l => l.Return).WithMany(r => r.Lines).HasForeignKey(l => l.ReturnId).OnDelete(DeleteBehavior.Cascade);
+        builder.HasOne(l => l.SalesInvoiceLine).WithMany().HasForeignKey(l => l.SalesInvoiceLineId).OnDelete(DeleteBehavior.Restrict);
+        builder.HasOne(l => l.Item).WithMany().HasForeignKey(l => l.ItemId).OnDelete(DeleteBehavior.Restrict);
+    }
+}

Backend/ERPCore/Infra/Persistence/Configurations/SalesSlipConfiguration.cs

@@ -79,11 +79,6 @@ public sealed class SalesSlipLineConfiguration : IEntityTypeConfiguration<SalesS
         builder.Property(x => x.TaxPct).HasPrecision(9, 4);
         builder.Property(x => x.TaxAmount).HasPrecision(18, 4);
 
-        builder.HasOne(x => x.Uom)
-            .WithMany()
-            .HasForeignKey(x => x.UomId)
-            .OnDelete(DeleteBehavior.Restrict);
-
         builder.HasOne(x => x.Warehouse)
             .WithMany()
             .HasForeignKey(x => x.WarehouseId)

Backend/ERPCore/Infra/Persistence/Configurations/StockAdjustmentConfiguration.cs

@@ -16,6 +16,7 @@ public sealed class StockAdjustmentConfiguration : IEntityTypeConfiguration<Stoc
 
         builder.Property(a => a.Status).HasConversion<string>().HasMaxLength(20).IsRequired();
         builder.Property(a => a.CreatedAt).IsRequired();
+        builder.Property(a => a.GlJournalNo).HasMaxLength(30);
         builder.Property(a => a.RowVersion).IsRowVersion();
 
         builder.HasOne(a => a.Warehouse).WithMany().HasForeignKey(a => a.WarehouseId).OnDelete(DeleteBehavior.Restrict);

Backend/ERPCore/Infra/Persistence/Configurations/SubNavItemConfiguration.cs

@@ -33,6 +33,7 @@ public sealed class SubNavItemConfiguration : IEntityTypeConfiguration<SubNavIte
             new SubNavItem { SubNavItemId = 6, NavItemId = 2, Code = "products.configuration", Label = "Configuration", Href = "/dashboard/products/settings", SortOrder = 6 },
             new SubNavItem { SubNavItemId = 7, NavItemId = 9, Code = "settings.roles", Label = "Roles", Href = "/dashboard/settings/roles", SortOrder = 1 },
             new SubNavItem { SubNavItemId = 8, NavItemId = 9, Code = "settings.users", Label = "Users", Href = "/dashboard/settings/users", SortOrder = 2 },
+            new SubNavItem { SubNavItemId = 23, NavItemId = 13, Code = "sales.bundle-sales", Label = "Bundle Sales", Href = "/dashboard/sales/bundles", SortOrder = 1 },
             // Procurement (NavItemId 4) children — mirror the hub page order.
             // IDs 17-20 (not 9-12): 9-12 were already claimed by the Ledgers sub-items below;
             // these procurement rows were never actually migrated into the database before now.

Backend/ERPCore/Infra/Persistence/Configurations/UomConversionConfiguration.cs

@@ -1,34 +0,0 @@
-using ERPCore.Domain.Entities;
-using Microsoft.EntityFrameworkCore;
-using Microsoft.EntityFrameworkCore.Metadata.Builders;
-
-namespace ERPCore.Infra.Persistence.Configurations;
-
-public sealed class UomConversionConfiguration : IEntityTypeConfiguration<UomConversion>
-{
-    public void Configure(EntityTypeBuilder<UomConversion> builder)
-    {
-        builder.ToTable("uom_conversions");
-        builder.HasKey(c => c.ConversionId);
-
-        builder.Property(c => c.Factor).HasPrecision(18, 6);
-
-        builder.HasOne(c => c.Item)
-            .WithMany(i => i.UomConversions)
-            .HasForeignKey(c => c.ItemId)
-            .OnDelete(DeleteBehavior.Cascade);
-
-        builder.HasOne(c => c.FromUom)
-            .WithMany()
-            .HasForeignKey(c => c.FromUomId)
-            .OnDelete(DeleteBehavior.Restrict);
-
-        builder.HasOne(c => c.ToUom)
-            .WithMany()
-            .HasForeignKey(c => c.ToUomId)
-            .OnDelete(DeleteBehavior.Restrict);
-
-        // One conversion per (item, from, to) triple.
-        builder.HasIndex(c => new { c.ItemId, c.FromUomId, c.ToUomId }).IsUnique();
-    }
-}

Backend/ERPCore/Infra/Persistence/DataSeeder.cs

@@ -43,7 +43,7 @@ public static class DataSeeder
     {
         var dirty = await SeedReasonCodesAsync(db, ct);
         dirty |= await SeedItemTypesAsync(db, ct);
-        dirty |= await SeedCompanyProfileAsync(db, ct);
+       // dirty |= await SeedCompanyProfileAsync(db, ct);
         dirty |= await SeedProductConfigAsync(db, ct);
         dirty |= await SeedSalesMastersAsync(db, ct);
         dirty |= await SeedSalesStockAsync(db, ct);
@@ -109,31 +109,31 @@ public static class DataSeeder
     /// Seeds a printable company profile with reasonable defaults for invoice headers.
     /// These values are intentionally editable later through the API.
     /// </summary>
-    private static async Task<bool> SeedCompanyProfileAsync(ErpDbContext db, CancellationToken ct)
-    {
-        if (await db.CompanyProfiles.AnyAsync(c => c.CompanyProfileId == CompanyProfile.SingletonId, ct)) return false;
+    //private static async Task<bool> SeedCompanyProfileAsync(ErpDbContext db, CancellationToken ct)
+    //{
+    //    if (await db.CompanyProfiles.AnyAsync(c => c.CompanyProfileId == CompanyProfile.SingletonId, ct)) return false;
 
-        db.CompanyProfiles.Add(new CompanyProfile
-        {
-            CompanyProfileId = CompanyProfile.SingletonId,
-            LegalName = "ERP Core Trading (Pvt) Ltd",
-            TradeName = "ERP Core Trading",
-            TaxRegistrationNo = "TAX-DEFAULT-001",
-            VatRegistrationNo = "VAT-DEFAULT-001",
-            AddressLine1 = "1 Demo Street",
-            City = "Colombo",
-            Country = "Sri Lanka",
-            Phone = "+94 11 000 0000",
-            Email = "accounts@example.com",
-            BankName = "Demo Bank",
-            BankBranch = "Colombo Main",
-            AccountName = "ERP Core Trading (Pvt) Ltd",
-            AccountNumber = "000123456789",
-            SwiftCode = "DEMO1234",
-            FooterNote = "Thank you for your business."
-        });
-        return true;
-    }
+    //    db.CompanyProfiles.Add(new CompanyProfile
+    //    {
+    //        CompanyProfileId = CompanyProfile.SingletonId,
+    //        LegalName = "ERP Core Trading (Pvt) Ltd",
+    //        TradeName = "ERP Core Trading",
+    //        TaxRegistrationNo = "TAX-DEFAULT-001",
+    //        VatRegistrationNo = "VAT-DEFAULT-001",
+    //        AddressLine1 = "1 Demo Street",
+    //        City = "Colombo",
+    //        Country = "Sri Lanka",
+    //        Phone = "+94 11 000 0000",
+    //        Email = "accounts@example.com",
+    //        BankName = "Demo Bank",
+    //        BankBranch = "Colombo Main",
+    //        AccountName = "ERP Core Trading (Pvt) Ltd",
+    //        AccountNumber = "000123456789",
+    //        SwiftCode = "DEMO1234",
+    //        FooterNote = "Thank you for your business."
+    //    });
+    //    return true;
+    //}
 
     /// <summary>
     /// Seeds the minimum catalog data required for the sales demo rows to exist.
@@ -285,13 +285,18 @@ public static class DataSeeder
             new Item
             {
                 Sku = "SKU-DEMO-002",
-                Name = "Demo Item 2",
-                Description = "Secondary seeded sample item for sales documents",
+                Name = "Demo Item 2 (500 ml)",
+                Description = "Secondary seeded sample item; carries a content size so the "
+                    + "production content-unit path has a fixture",
                 CategoryId = category.CategoryId,
                 BaseUomId = uom.UomId,
                 StockNature = StockNature.Stocked,
                 TrackingMode = TrackingMode.None,
                 SalePrice = 50m,
+                ContentQty = 500m,
+                ContentUnit = MeasureUnit.Ml,
+                ContentBaseQty = 500m,
+                ContentBaseUnit = MeasureUnit.Ml,
                 Status = EntityStatus.Active,
                 CreatedAt = now
             }
@@ -318,6 +323,15 @@ public static class DataSeeder
         dirty |= await SeedSalesSequencesAsync(db, ct);
         dirty |= await SeedSampleSalesDocsAsync(db, ct);
 
+        try
+        {
+            dirty |= await SeedBundleSalesAsync(db, ct);
+        }
+        catch
+        {
+            // Bundle demo data is best-effort only; never block startup because of seed drift.
+        }
+
         return dirty;
     }
 
@@ -369,7 +383,7 @@ public static class DataSeeder
     {
         var year = DateTime.UtcNow.Year;
         var existing = await db.NumberSequences
-            .Where(s => s.Year == year && (s.DocType == DocumentTypes.SalesInvoice || s.DocType == DocumentTypes.SalesSlip))
+            .Where(s => s.Year == year && (s.DocType == DocumentTypes.SalesInvoice || s.DocType == DocumentTypes.SalesSlip || s.DocType == DocumentTypes.BundleSale))
             .Select(s => s.DocType)
             .ToListAsync(ct);
         var have = existing.ToHashSet(StringComparer.OrdinalIgnoreCase);
@@ -377,7 +391,8 @@ public static class DataSeeder
         var seeds = new[]
         {
             new NumberSequence { DocType = DocumentTypes.SalesInvoice, Year = year, LastNumber = 0 },
-            new NumberSequence { DocType = DocumentTypes.SalesSlip, Year = year, LastNumber = 0 }
+            new NumberSequence { DocType = DocumentTypes.SalesSlip, Year = year, LastNumber = 0 },
+            new NumberSequence { DocType = DocumentTypes.BundleSale, Year = year, LastNumber = 0 }
         };
 
         var toAdd = seeds.Where(s => !have.Contains(s.DocType)).ToList();
@@ -387,6 +402,202 @@ public static class DataSeeder
         return true;
     }
 
+    private static async Task<bool> SeedBundleSalesAsync(ErpDbContext db, CancellationToken ct)
+    {
+        if (await db.BundleSaleTemplates.AnyAsync(ct) || await db.BundleSales.AnyAsync(ct))
+            return false;
+
+        var customer = await db.Customers.AsNoTracking()
+            .OrderBy(c => c.CustomerId)
+            .FirstOrDefaultAsync(ct);
+        var warehouse = await db.Warehouses.AsNoTracking()
+            .OrderBy(w => w.WarehouseId)
+            .FirstOrDefaultAsync(ct);
+        var secondaryWarehouse = await db.Warehouses.AsNoTracking()
+            .OrderByDescending(w => w.WarehouseId)
+            .FirstOrDefaultAsync(ct);
+        var items = await db.Items.AsNoTracking()
+            .OrderBy(i => i.ItemId)
+            .Take(2)
+            .ToListAsync(ct);
+        var uom = await db.Uoms.AsNoTracking()
+            .OrderBy(u => u.UomId)
+            .FirstOrDefaultAsync(ct);
+        var user = await db.Users.AsNoTracking()
+            .OrderBy(u => u.UserId)
+            .FirstOrDefaultAsync(ct);
+
+        if (customer is null || warehouse is null || secondaryWarehouse is null || items.Count < 2 || uom is null || user is null)
+            return false;
+
+        var now = DateTime.UtcNow;
+        var template = new BundleSaleTemplate
+        {
+            TemplateCode = "BND-DEMO-001",
+            TemplateName = "Demo Bundle Pack",
+            Description = "Seeded fixed bundle template for integration testing",
+            Status = EntityStatus.Active,
+            CreatedAt = now,
+            Lines =
+            [
+                new BundleSaleTemplateLine
+                {
+                    ItemId = items[0].ItemId,
+                    WarehouseId = warehouse.WarehouseId,
+                    Qty = 1m,
+                    UnitPrice = items[0].SalePrice.GetValueOrDefault(),
+                    IncludeInBundle = true,
+                    SortOrder = 1
+                },
+                new BundleSaleTemplateLine
+                {
+                    ItemId = items[1].ItemId,
+                    WarehouseId = warehouse.WarehouseId,
+                    Qty = 1m,
+                    UnitPrice = items[1].SalePrice.GetValueOrDefault(),
+                    IncludeInBundle = true,
+                    SortOrder = 2
+                }
+            ]
+        };
+
+        db.BundleSaleTemplates.Add(template);
+        await db.SaveChangesAsync(ct);
+
+        var bundleSales = new[]
+        {
+            new BundleSale
+            {
+                BundleNo = $"BND-{now:yyyy}-00001",
+                BundleDate = now.Date.AddDays(-2),
+                CustomerId = customer.CustomerId,
+                CustomerSnapshotName = customer.DisplayName ?? customer.Name,
+                WarehouseId = warehouse.WarehouseId,
+                CashierUserId = user.UserId,
+                BundleSaleTemplateId = template.BundleSaleTemplateId,
+                BundleName = "Demo Bundle Draft",
+                BundleCode = "BND-DEMO-001",
+                Status = BundleSaleStatus.Draft,
+                ComponentSubtotal = items[0].SalePrice.GetValueOrDefault() + items[1].SalePrice.GetValueOrDefault(),
+                BundlePrice = 0m,
+                MarginAmount = -(items[0].SalePrice.GetValueOrDefault() + items[1].SalePrice.GetValueOrDefault()),
+                DiscountTotal = items[0].SalePrice.GetValueOrDefault() + items[1].SalePrice.GetValueOrDefault(),
+                TaxTotal = 0m,
+                GrandTotal = 0m,
+                CreatedAt = now.AddDays(-2),
+                Lines =
+                [
+                    new BundleSaleLine
+                    {
+                        ItemId = items[0].ItemId,
+                        Description = items[0].Name,
+                        Qty = 1m,
+                        WarehouseId = warehouse.WarehouseId,
+                        UnitPrice = items[0].SalePrice.GetValueOrDefault(),
+                        LineTotal = items[0].SalePrice.GetValueOrDefault(),
+                        IncludeInBundle = true,
+                        IsComponent = true
+                    },
+                    new BundleSaleLine
+                    {
+                        ItemId = items[1].ItemId,
+                        Description = items[1].Name,
+                        Qty = 1m,
+                        WarehouseId = warehouse.WarehouseId,
+                        UnitPrice = items[1].SalePrice.GetValueOrDefault(),
+                        LineTotal = items[1].SalePrice.GetValueOrDefault(),
+                        IncludeInBundle = true,
+                        IsComponent = true
+                    }
+                ]
+            },
+            new BundleSale
+            {
+                BundleNo = $"BND-{now:yyyy}-00002",
+                BundleDate = now.Date.AddDays(-1),
+                CustomerId = customer.CustomerId,
+                CustomerSnapshotName = customer.DisplayName ?? customer.Name,
+                WarehouseId = warehouse.WarehouseId,
+                CashierUserId = user.UserId,
+                BundleSaleTemplateId = template.BundleSaleTemplateId,
+                BundleName = "Demo Bundle Posted",
+                BundleCode = "BND-DEMO-001",
+                Status = BundleSaleStatus.Posted,
+                ComponentSubtotal = items[0].SalePrice.GetValueOrDefault() + items[1].SalePrice.GetValueOrDefault(),
+                BundlePrice = (items[0].SalePrice.GetValueOrDefault() + items[1].SalePrice.GetValueOrDefault()) - 10m,
+                MarginAmount = -10m,
+                DiscountTotal = 10m,
+                TaxTotal = 0m,
+                GrandTotal = (items[0].SalePrice.GetValueOrDefault() + items[1].SalePrice.GetValueOrDefault()) - 10m,
+                CreatedAt = now.AddDays(-1),
+                UpdatedAt = now.AddHours(-2),
+                Lines =
+                [
+                    new BundleSaleLine
+                    {
+                        ItemId = items[0].ItemId,
+                        Description = items[0].Name,
+                        Qty = 1m,
+                        WarehouseId = warehouse.WarehouseId,
+                        UnitPrice = items[0].SalePrice.GetValueOrDefault(),
+                        LineTotal = items[0].SalePrice.GetValueOrDefault(),
+                        IncludeInBundle = true,
+                        IsComponent = true
+                    },
+                    new BundleSaleLine
+                    {
+                        ItemId = items[1].ItemId,
+                        Description = items[1].Name,
+                        Qty = 1m,
+                        WarehouseId = warehouse.WarehouseId,
+                        UnitPrice = items[1].SalePrice.GetValueOrDefault(),
+                        LineTotal = items[1].SalePrice.GetValueOrDefault(),
+                        IncludeInBundle = true,
+                        IsComponent = true
+                    }
+                ]
+            },
+            new BundleSale
+            {
+                BundleNo = $"BND-{now:yyyy}-00003",
+                BundleDate = now.Date,
+                CustomerId = customer.CustomerId,
+                CustomerSnapshotName = customer.DisplayName ?? customer.Name,
+                WarehouseId = secondaryWarehouse.WarehouseId,
+                CashierUserId = user.UserId,
+                BundleSaleTemplateId = template.BundleSaleTemplateId,
+                BundleName = "Demo Bundle Cancelled",
+                BundleCode = "BND-DEMO-001",
+                Status = BundleSaleStatus.Cancelled,
+                ComponentSubtotal = items[0].SalePrice.GetValueOrDefault(),
+                BundlePrice = items[0].SalePrice.GetValueOrDefault(),
+                MarginAmount = 0m,
+                DiscountTotal = 0m,
+                TaxTotal = 0m,
+                GrandTotal = items[0].SalePrice.GetValueOrDefault(),
+                CreatedAt = now,
+                UpdatedAt = now,
+                Lines =
+                [
+                    new BundleSaleLine
+                    {
+                        ItemId = items[0].ItemId,
+                        Description = items[0].Name,
+                        Qty = 1m,
+                        WarehouseId = secondaryWarehouse.WarehouseId,
+                        UnitPrice = items[0].SalePrice.GetValueOrDefault(),
+                        LineTotal = items[0].SalePrice.GetValueOrDefault(),
+                        IncludeInBundle = true,
+                        IsComponent = true
+                    }
+                ]
+            }
+        };
+
+        db.BundleSales.AddRange(bundleSales);
+        return true;
+    }
+
     private static async Task<bool> SeedSampleSalesDocsAsync(ErpDbContext db, CancellationToken ct)
     {
         if (await db.SalesInvoices.AnyAsync(ct) || await db.SalesSlips.AnyAsync(ct))
@@ -449,7 +660,6 @@ public static class DataSeeder
                         Description = postableItem.Name,
                         Qty = 2m,
                         FreeQty = 0m,
-                        UomId = uom.UomId,
                         WarehouseId = warehouse.WarehouseId,
                         UnitPrice = 100m,
                         BaseCost = 0m,
@@ -493,7 +703,6 @@ public static class DataSeeder
                         Description = shortageItem.Name,
                         Qty = 6m,
                         FreeQty = 0m,
-                        UomId = uom.UomId,
                         WarehouseId = secondaryWarehouse.WarehouseId,
                         UnitPrice = 50m,
                         BaseCost = 0m,
@@ -538,7 +747,6 @@ public static class DataSeeder
                         Description = postableItem.Name,
                         Qty = 1m,
                         FreeQty = 0m,
-                        UomId = uom.UomId,
                         WarehouseId = warehouse.WarehouseId,
                         UnitPrice = 100m,
                         BaseCost = 0m,
@@ -581,7 +789,6 @@ public static class DataSeeder
                         Description = postableItem.Name,
                         Qty = 1m,
                         FreeQty = 0m,
-                        UomId = uom.UomId,
                         WarehouseId = warehouse.WarehouseId,
                         UnitPrice = 50m,
                         BaseCost = 0m,
@@ -621,7 +828,6 @@ public static class DataSeeder
                         Description = shortageItem.Name,
                         Qty = 3m,
                         FreeQty = 0m,
-                        UomId = uom.UomId,
                         WarehouseId = secondaryWarehouse.WarehouseId,
                         UnitPrice = 50m,
                         BaseCost = 0m,

Backend/ERPCore/Infra/Persistence/ErpDbContext.cs

@@ -30,14 +30,12 @@ public class ErpDbContext : DbContext
     /// <summary>Color/Size/Material dimension names. Unlinked to Item by design (docs/10 C.9).</summary>
     public DbSet<ItemType> ItemTypes => Set<ItemType>();
     public DbSet<Uom> Uoms => Set<Uom>();
-    public DbSet<UomConversion> UomConversions => Set<UomConversion>();
     public DbSet<Item> Items => Set<Item>();
     public DbSet<ItemReorder> ItemReorders => Set<ItemReorder>();
     public DbSet<Vendor> Vendors => Set<Vendor>();
     public DbSet<Warehouse> Warehouses => Set<Warehouse>();
     public DbSet<Bin> Bins => Set<Bin>();
-    /// <summary>Singleton business profile used by printable documents.</summary>
-    public DbSet<CompanyProfile> CompanyProfiles => Set<CompanyProfile>();
+    
     /// <summary>Singleton row (FR-MD-11).</summary>
     public DbSet<ProductConfig> ProductConfig => Set<ProductConfig>();
 
@@ -65,6 +63,7 @@ public class ErpDbContext : DbContext
     // --- Goods Receipt (docs/10 Part C.3) ---
     public DbSet<Grn> Grns => Set<Grn>();
     public DbSet<GrnLine> GrnLines => Set<GrnLine>();
+    public DbSet<GrnPayment> GrnPayments => Set<GrnPayment>();
 
     // --- Batch / Serial (docs/10 Part C.4) ---
     public DbSet<Batch> Batches => Set<Batch>();
@@ -89,8 +88,16 @@ public class ErpDbContext : DbContext
     // --- Sales (Phase 1) ---
     public DbSet<SalesInvoice> SalesInvoices => Set<SalesInvoice>();
     public DbSet<SalesInvoiceLine> SalesInvoiceLines => Set<SalesInvoiceLine>();
+    public DbSet<SalesInvoicePayment> SalesInvoicePayments => Set<SalesInvoicePayment>();
     public DbSet<SalesSlip> SalesSlips => Set<SalesSlip>();
     public DbSet<SalesSlipLine> SalesSlipLines => Set<SalesSlipLine>();
+    public DbSet<SalesDayEnd> SalesDayEnds => Set<SalesDayEnd>();
+    public DbSet<BundleSaleTemplate> BundleSaleTemplates => Set<BundleSaleTemplate>();
+    public DbSet<BundleSaleTemplateLine> BundleSaleTemplateLines => Set<BundleSaleTemplateLine>();
+    public DbSet<BundleSale> BundleSales => Set<BundleSale>();
+    public DbSet<BundleSaleLine> BundleSaleLines => Set<BundleSaleLine>();
+    public DbSet<SalesReturn> SalesReturns => Set<SalesReturn>();
+    public DbSet<SalesReturnLine> SalesReturnLines => Set<SalesReturnLine>();
 
     // --- Reference data (docs/10 Part C.7) ---
     public DbSet<ReasonCode> ReasonCodes => Set<ReasonCode>();

Backend/ERPCore/Migrations/20260728053233_InitialCreate.cs

@@ -1,22 +0,0 @@
-using Microsoft.EntityFrameworkCore.Migrations;
-
-#nullable disable
-
-namespace ERPCore.Migrations
-{
-    /// <inheritdoc />
-    public partial class InitialCreate : Migration
-    {
-        /// <inheritdoc />
-        protected override void Up(MigrationBuilder migrationBuilder)
-        {
-
-        }
-
-        /// <inheritdoc />
-        protected override void Down(MigrationBuilder migrationBuilder)
-        {
-
-        }
-    }
-}

Backend/ERPCore/Migrations/20260801000000_AddCompanyProfile.Designer.cs

@@ -1,23 +0,0 @@
-// <auto-generated />
-using ERPCore.Infra.Persistence;
-using Microsoft.EntityFrameworkCore;
-using Microsoft.EntityFrameworkCore.Infrastructure;
-using Microsoft.EntityFrameworkCore.Migrations;
-
-#nullable disable
-
-namespace ERPCore.Migrations
-{
-    [DbContext(typeof(ErpDbContext))]
-    [Migration("20260801000000_AddCompanyProfile")]
-    partial class AddCompanyProfile
-    {
-        /// <inheritdoc />
-        protected override void BuildTargetModel(ModelBuilder modelBuilder)
-        {
-            // This designer is kept minimal because the repo does not regenerate migrations here.
-            // EF tooling only needs the migration metadata to exist; the active model snapshot
-            // is updated separately.
-        }
-    }
-}

Backend/ERPCore/Migrations/20260801000000_AddCompanyProfile.cs

@@ -1,60 +0,0 @@
-using Microsoft.EntityFrameworkCore.Migrations;
-
-#nullable disable
-
-namespace ERPCore.Migrations
-{
-    /// <inheritdoc />
-    public partial class AddCompanyProfile : Migration
-    {
-        /// <inheritdoc />
-        protected override void Up(MigrationBuilder migrationBuilder)
-        {
-            migrationBuilder.CreateTable(
-                name: "company_profile",
-                columns: table => new
-                {
-                    CompanyProfileId = table.Column<int>(type: "integer", nullable: false),
-                    LegalName = table.Column<string>(type: "character varying(200)", maxLength: 200, nullable: false),
-                    TradeName = table.Column<string>(type: "character varying(200)", maxLength: 200, nullable: true),
-                    LogoUrl = table.Column<string>(type: "character varying(500)", maxLength: 500, nullable: true),
-                    TaxRegistrationNo = table.Column<string>(type: "character varying(50)", maxLength: 50, nullable: true),
-                    VatRegistrationNo = table.Column<string>(type: "character varying(50)", maxLength: 50, nullable: true),
-                    AddressLine1 = table.Column<string>(type: "character varying(200)", maxLength: 200, nullable: true),
-                    AddressLine2 = table.Column<string>(type: "character varying(200)", maxLength: 200, nullable: true),
-                    City = table.Column<string>(type: "character varying(100)", maxLength: 100, nullable: true),
-                    Country = table.Column<string>(type: "character varying(100)", maxLength: 100, nullable: true),
-                    Phone = table.Column<string>(type: "character varying(50)", maxLength: 50, nullable: true),
-                    Email = table.Column<string>(type: "character varying(200)", maxLength: 200, nullable: true),
-                    BankName = table.Column<string>(type: "character varying(200)", maxLength: 200, nullable: true),
-                    BankBranch = table.Column<string>(type: "character varying(200)", maxLength: 200, nullable: true),
-                    AccountName = table.Column<string>(type: "character varying(200)", maxLength: 200, nullable: true),
-                    AccountNumber = table.Column<string>(type: "character varying(100)", maxLength: 100, nullable: true),
-                    SwiftCode = table.Column<string>(type: "character varying(50)", maxLength: 50, nullable: true),
-                    FooterNote = table.Column<string>(type: "character varying(500)", maxLength: 500, nullable: true),
-                    UpdatedAt = table.Column<DateTime>(type: "timestamp with time zone", nullable: true),
-                    UpdatedBy = table.Column<int>(type: "integer", nullable: true),
-                    xmin = table.Column<uint>(type: "xid", rowVersion: true, nullable: false)
-                },
-                constraints: table =>
-                {
-                    table.PrimaryKey("PK_company_profile", x => x.CompanyProfileId);
-                    table.CheckConstraint("ck_company_profile_singleton", "\"CompanyProfileId\" = 1");
-                    table.ForeignKey(
-                        name: "FK_company_profile_users_UpdatedBy",
-                        column: x => x.UpdatedBy,
-                        principalTable: "users",
-                        principalColumn: "UserId",
-                        onDelete: ReferentialAction.Restrict);
-                });
-
-        }
-
-        /// <inheritdoc />
-        protected override void Down(MigrationBuilder migrationBuilder)
-        {
-            migrationBuilder.DropTable(
-                name: "company_profile");
-        }
-    }
-}

Backend/ERPCore/Migrations/20260811053751_initial.Designer.cs

@@ -9,11 +9,11 @@ using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
 
 #nullable disable
 
-namespace ERPCore.Infra.Persistence.Migrations
+namespace ERPCore.Migrations
 {
     [DbContext(typeof(ErpDbContext))]
-    [Migration("20260801025920_InitialCreate")]
-    partial class InitialCreate
+    [Migration("20260811053751_initial")]
+    partial class initial
     {
         /// <inheritdoc />
         protected override void BuildTargetModel(ModelBuilder modelBuilder)
@@ -368,6 +368,259 @@ namespace ERPCore.Infra.Persistence.Migrations
                     b.ToTable("brands", (string)null);
                 });
 
+            modelBuilder.Entity("ERPCore.Domain.Entities.BundleSale", b =>
+                {
+                    b.Property<int>("BundleSaleId")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("BundleSaleId"));
+
+                    b.Property<string>("BundleCode")
+                        .IsRequired()
+                        .HasMaxLength(50)
+                        .HasColumnType("character varying(50)");
+
+                    b.Property<DateTime>("BundleDate")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("BundleName")
+                        .IsRequired()
+                        .HasMaxLength(200)
+                        .HasColumnType("character varying(200)");
+
+                    b.Property<string>("BundleNo")
+                        .IsRequired()
+                        .HasMaxLength(50)
+                        .HasColumnType("character varying(50)");
+
+                    b.Property<decimal>("BundlePrice")
+                        .HasPrecision(18, 4)
+                        .HasColumnType("numeric(18,4)");
+
+                    b.Property<int>("BundleSaleTemplateId")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("CashierUserId")
+                        .HasColumnType("integer");
+
+                    b.Property<decimal>("ComponentSubtotal")
+                        .HasPrecision(18, 4)
+                        .HasColumnType("numeric(18,4)");
+
+                    b.Property<int>("ConcurrencyStamp")
+                        .IsConcurrencyToken()
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer")
+                        .HasDefaultValue(0);
+
+                    b.Property<DateTime>("CreatedAt")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<int>("CustomerId")
+                        .HasColumnType("integer");
+
+                    b.Property<string>("CustomerSnapshotName")
+                        .IsRequired()
+                        .HasMaxLength(200)
+                        .HasColumnType("character varying(200)");
+
+                    b.Property<decimal>("DiscountTotal")
+                        .HasPrecision(18, 4)
+                        .HasColumnType("numeric(18,4)");
+
+                    b.Property<decimal>("GrandTotal")
+                        .HasPrecision(18, 4)
+                        .HasColumnType("numeric(18,4)");
+
+                    b.Property<decimal>("MarginAmount")
+                        .HasPrecision(18, 4)
+                        .HasColumnType("numeric(18,4)");
+
+                    b.Property<string>("Status")
+                        .IsRequired()
+                        .ValueGeneratedOnAdd()
+                        .HasMaxLength(20)
+                        .HasColumnType("character varying(20)")
+                        .HasDefaultValue("Draft");
+
+                    b.Property<decimal>("TaxTotal")
+                        .HasPrecision(18, 4)
+                        .HasColumnType("numeric(18,4)");
+
+                    b.Property<DateTime?>("UpdatedAt")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<int>("WarehouseId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("BundleSaleId");
+
+                    b.HasIndex("BundleNo")
+                        .IsUnique();
+
+                    b.HasIndex("BundleSaleTemplateId");
+
+                    b.HasIndex("CashierUserId");
+
+                    b.HasIndex("CustomerId");
+
+                    b.HasIndex("WarehouseId");
+
+                    b.ToTable("bundle_sales", (string)null);
+                });
+
+            modelBuilder.Entity("ERPCore.Domain.Entities.BundleSaleLine", b =>
+                {
+                    b.Property<int>("BundleSaleLineId")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("BundleSaleLineId"));
+
+                    b.Property<int>("BundleSaleId")
+                        .HasColumnType("integer");
+
+                    b.Property<string>("Description")
+                        .IsRequired()
+                        .HasMaxLength(200)
+                        .HasColumnType("character varying(200)");
+
+                    b.Property<bool>("IncludeInBundle")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("boolean")
+                        .HasDefaultValue(true);
+
+                    b.Property<bool>("IsComponent")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("boolean")
+                        .HasDefaultValue(true);
+
+                    b.Property<int>("ItemId")
+                        .HasColumnType("integer");
+
+                    b.Property<decimal>("LineTotal")
+                        .HasPrecision(18, 4)
+                        .HasColumnType("numeric(18,4)");
+
+                    b.Property<int?>("ParentLineId")
+                        .HasColumnType("integer");
+
+                    b.Property<decimal>("Qty")
+                        .HasPrecision(18, 4)
+                        .HasColumnType("numeric(18,4)");
+
+                    b.Property<decimal>("UnitPrice")
+                        .HasPrecision(18, 4)
+                        .HasColumnType("numeric(18,4)");
+
+                    b.Property<int>("WarehouseId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("BundleSaleLineId");
+
+                    b.HasIndex("BundleSaleId");
+
+                    b.HasIndex("ItemId");
+
+                    b.HasIndex("WarehouseId");
+
+                    b.ToTable("bundle_sale_lines", (string)null);
+                });
+
+            modelBuilder.Entity("ERPCore.Domain.Entities.BundleSaleTemplate", b =>
+                {
+                    b.Property<int>("BundleSaleTemplateId")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("BundleSaleTemplateId"));
+
+                    b.Property<int>("ConcurrencyStamp")
+                        .IsConcurrencyToken()
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer")
+                        .HasDefaultValue(0);
+
+                    b.Property<DateTime>("CreatedAt")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("Description")
+                        .HasMaxLength(1000)
+                        .HasColumnType("character varying(1000)");
+
+                    b.Property<string>("Status")
+                        .IsRequired()
+                        .ValueGeneratedOnAdd()
+                        .HasMaxLength(20)
+                        .HasColumnType("character varying(20)")
+                        .HasDefaultValue("Active");
+
+                    b.Property<string>("TemplateCode")
+                        .IsRequired()
+                        .HasMaxLength(50)
+                        .HasColumnType("character varying(50)");
+
+                    b.Property<string>("TemplateName")
+                        .IsRequired()
+                        .HasMaxLength(200)
+                        .HasColumnType("character varying(200)");
+
+                    b.Property<DateTime?>("UpdatedAt")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.HasKey("BundleSaleTemplateId");
+
+                    b.HasIndex("TemplateCode")
+                        .IsUnique();
+
+                    b.ToTable("bundle_sale_templates", (string)null);
+                });
+
+            modelBuilder.Entity("ERPCore.Domain.Entities.BundleSaleTemplateLine", b =>
+                {
+                    b.Property<int>("BundleSaleTemplateLineId")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("BundleSaleTemplateLineId"));
+
+                    b.Property<int>("BundleSaleTemplateId")
+                        .HasColumnType("integer");
+
+                    b.Property<bool>("IncludeInBundle")
+                        .HasColumnType("boolean");
+
+                    b.Property<int>("ItemId")
+                        .HasColumnType("integer");
+
+                    b.Property<decimal>("Qty")
+                        .HasPrecision(18, 4)
+                        .HasColumnType("numeric(18,4)");
+
+                    b.Property<int>("SortOrder")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer")
+                        .HasDefaultValue(0);
+
+                    b.Property<decimal>("UnitPrice")
+                        .HasPrecision(18, 4)
+                        .HasColumnType("numeric(18,4)");
+
+                    b.Property<int>("WarehouseId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("BundleSaleTemplateLineId");
+
+                    b.HasIndex("BundleSaleTemplateId");
+
+                    b.HasIndex("ItemId");
+
+                    b.HasIndex("WarehouseId");
+
+                    b.ToTable("bundle_sale_template_lines", (string)null);
+                });
+
             modelBuilder.Entity("ERPCore.Domain.Entities.Category", b =>
                 {
                     b.Property<int>("CategoryId")
@@ -1264,9 +1517,6 @@ namespace ERPCore.Infra.Persistence.Migrations
                         .HasPrecision(18, 6)
                         .HasColumnType("numeric(18,6)");
 
-                    b.Property<int>("UomId")
-                        .HasColumnType("integer");
-
                     b.Property<decimal>("VatAmount")
                         .HasPrecision(18, 4)
                         .HasColumnType("numeric(18,4)");
@@ -1287,8 +1537,6 @@ namespace ERPCore.Infra.Persistence.Migrations
 
                     b.HasIndex("PoLineId");
 
-                    b.HasIndex("UomId");
-
                     b.ToTable("grn_lines", (string)null);
                 });
 
@@ -1367,6 +1615,22 @@ namespace ERPCore.Infra.Persistence.Migrations
                     b.Property<int>("CategoryId")
                         .HasColumnType("integer");
 
+                    b.Property<decimal?>("ContentBaseQty")
+                        .HasPrecision(18, 4)
+                        .HasColumnType("numeric(18,4)");
+
+                    b.Property<string>("ContentBaseUnit")
+                        .HasMaxLength(20)
+                        .HasColumnType("character varying(20)");
+
+                    b.Property<decimal?>("ContentQty")
+                        .HasPrecision(18, 4)
+                        .HasColumnType("numeric(18,4)");
+
+                    b.Property<string>("ContentUnit")
+                        .HasMaxLength(20)
+                        .HasColumnType("character varying(20)");
+
                     b.Property<DateTime>("CreatedAt")
                         .HasColumnType("timestamp with time zone");
 
@@ -1953,6 +2217,15 @@ namespace ERPCore.Infra.Persistence.Migrations
                             Label = "Accounts",
                             SortOrder = 12,
                             Status = "Active"
+                        },
+                        new
+                        {
+                            NavItemId = 13,
+                            Code = "sales",
+                            Href = "/dashboard/sales",
+                            Label = "Sales",
+                            SortOrder = 13,
+                            Status = "Active"
                         });
                 });
 
@@ -2532,9 +2805,6 @@ namespace ERPCore.Infra.Persistence.Migrations
                         .HasPrecision(18, 4)
                         .HasColumnType("numeric(18,4)");
 
-                    b.Property<int>("UomId")
-                        .HasColumnType("integer");
-
                     b.Property<int>("WarehouseId")
                         .HasColumnType("integer");
 
@@ -2544,8 +2814,6 @@ namespace ERPCore.Infra.Persistence.Migrations
 
                     b.HasIndex("PoId");
 
-                    b.HasIndex("UomId");
-
                     b.HasIndex("WarehouseId");
 
                     b.ToTable("po_lines", (string)null);
@@ -3261,6 +3529,11 @@ namespace ERPCore.Infra.Persistence.Migrations
                         .HasPrecision(18, 4)
                         .HasColumnType("numeric(18,4)");
 
+                    b.Property<string>("QtyUnit")
+                        .IsRequired()
+                        .HasMaxLength(20)
+                        .HasColumnType("character varying(20)");
+
                     b.Property<decimal>("ReturnedQty")
                         .HasPrecision(18, 4)
                         .HasColumnType("numeric(18,4)");
@@ -3277,9 +3550,6 @@ namespace ERPCore.Infra.Persistence.Migrations
                         .HasMaxLength(20)
                         .HasColumnType("character varying(20)");
 
-                    b.Property<int>("UomId")
-                        .HasColumnType("integer");
-
                     b.HasKey("RunInputId");
 
                     b.HasIndex("FromRunOutputId");
@@ -3288,8 +3558,6 @@ namespace ERPCore.Infra.Persistence.Migrations
 
                     b.HasIndex("RunStageId");
 
-                    b.HasIndex("UomId");
-
                     b.ToTable("run_stage_inputs", (string)null);
                 });
 
@@ -3331,7 +3599,7 @@ namespace ERPCore.Infra.Persistence.Migrations
                         .HasPrecision(18, 4)
                         .HasColumnType("numeric(18,4)");
 
-                    b.Property<int>("UomId")
+                    b.Property<int?>("UomId")
                         .HasColumnType("integer");
 
                     b.HasKey("RunOutputId");
@@ -3597,9 +3865,6 @@ namespace ERPCore.Infra.Persistence.Migrations
                         .HasPrecision(18, 4)
                         .HasColumnType("numeric(18,4)");
 
-                    b.Property<int>("UomId")
-                        .HasColumnType("integer");
-
                     b.Property<int>("WarehouseId")
                         .HasColumnType("integer");
 
@@ -3609,8 +3874,6 @@ namespace ERPCore.Infra.Persistence.Migrations
 
                     b.HasIndex("SalesInvoiceId");
 
-                    b.HasIndex("UomId");
-
                     b.HasIndex("WarehouseId");
 
                     b.ToTable("sales_invoice_lines", (string)null);
@@ -3786,9 +4049,6 @@ namespace ERPCore.Infra.Persistence.Migrations
                         .HasPrecision(18, 4)
                         .HasColumnType("numeric(18,4)");
 
-                    b.Property<int>("UomId")
-                        .HasColumnType("integer");
-
                     b.Property<int>("WarehouseId")
                         .HasColumnType("integer");
 
@@ -3798,8 +4058,6 @@ namespace ERPCore.Infra.Persistence.Migrations
 
                     b.HasIndex("SalesSlipId");
 
-                    b.HasIndex("UomId");
-
                     b.HasIndex("WarehouseId");
 
                     b.ToTable("sales_slip_lines", (string)null);
@@ -3881,6 +4139,11 @@ namespace ERPCore.Infra.Persistence.Migrations
                         .HasPrecision(18, 4)
                         .HasColumnType("numeric(18,4)");
 
+                    b.Property<string>("QtyUnit")
+                        .IsRequired()
+                        .HasMaxLength(20)
+                        .HasColumnType("character varying(20)");
+
                     b.Property<string>("Source")
                         .IsRequired()
                         .HasMaxLength(20)
@@ -3889,9 +4152,6 @@ namespace ERPCore.Infra.Persistence.Migrations
                     b.Property<int>("StageId")
                         .HasColumnType("integer");
 
-                    b.Property<int>("UomId")
-                        .HasColumnType("integer");
-
                     b.HasKey("InputId");
 
                     b.HasIndex("FromOutputId");
@@ -3900,8 +4160,6 @@ namespace ERPCore.Infra.Persistence.Migrations
 
                     b.HasIndex("StageId");
 
-                    b.HasIndex("UomId");
-
                     b.ToTable("stage_inputs", (string)null);
                 });
 
@@ -3928,7 +4186,7 @@ namespace ERPCore.Infra.Persistence.Migrations
                     b.Property<int>("StageId")
                         .HasColumnType("integer");
 
-                    b.Property<int>("UomId")
+                    b.Property<int?>("UomId")
                         .HasColumnType("integer");
 
                     b.HasKey("OutputId");
@@ -4540,6 +4798,16 @@ namespace ERPCore.Infra.Persistence.Migrations
                             Status = "Active"
                         },
                         new
+                        {
+                            SubNavItemId = 23,
+                            Code = "sales.bundle-sales",
+                            Href = "/dashboard/sales/bundles",
+                            Label = "Bundle Sales",
+                            NavItemId = 13,
+                            SortOrder = 1,
+                            Status = "Active"
+                        },
+                        new
                         {
                             SubNavItemId = 17,
                             Code = "procurement.requisitions",
@@ -4786,39 +5054,6 @@ namespace ERPCore.Infra.Persistence.Migrations
                     b.ToTable("uoms", (string)null);
                 });
 
-            modelBuilder.Entity("ERPCore.Domain.Entities.UomConversion", b =>
-                {
-                    b.Property<int>("ConversionId")
-                        .ValueGeneratedOnAdd()
-                        .HasColumnType("integer");
-
-                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("ConversionId"));
-
-                    b.Property<decimal>("Factor")
-                        .HasPrecision(18, 6)
-                        .HasColumnType("numeric(18,6)");
-
-                    b.Property<int>("FromUomId")
-                        .HasColumnType("integer");
-
-                    b.Property<int>("ItemId")
-                        .HasColumnType("integer");
-
-                    b.Property<int>("ToUomId")
-                        .HasColumnType("integer");
-
-                    b.HasKey("ConversionId");
-
-                    b.HasIndex("FromUomId");
-
-                    b.HasIndex("ToUomId");
-
-                    b.HasIndex("ItemId", "FromUomId", "ToUomId")
-                        .IsUnique();
-
-                    b.ToTable("uom_conversions", (string)null);
-                });
-
             modelBuilder.Entity("ERPCore.Domain.Entities.User", b =>
                 {
                     b.Property<int>("UserId")
@@ -5152,6 +5387,95 @@ namespace ERPCore.Infra.Persistence.Migrations
                     b.Navigation("Warehouse");
                 });
 
+            modelBuilder.Entity("ERPCore.Domain.Entities.BundleSale", b =>
+                {
+                    b.HasOne("ERPCore.Domain.Entities.BundleSaleTemplate", "BundleSaleTemplate")
+                        .WithMany()
+                        .HasForeignKey("BundleSaleTemplateId")
+                        .OnDelete(DeleteBehavior.Restrict)
+                        .IsRequired();
+
+                    b.HasOne("ERPCore.Domain.Entities.User", "CashierUser")
+                        .WithMany()
+                        .HasForeignKey("CashierUserId")
+                        .OnDelete(DeleteBehavior.Restrict)
+                        .IsRequired();
+
+                    b.HasOne("ERPCore.Domain.Entities.Customer", "Customer")
+                        .WithMany()
+                        .HasForeignKey("CustomerId")
+                        .OnDelete(DeleteBehavior.Restrict)
+                        .IsRequired();
+
+                    b.HasOne("ERPCore.Domain.Entities.Warehouse", "Warehouse")
+                        .WithMany()
+                        .HasForeignKey("WarehouseId")
+                        .OnDelete(DeleteBehavior.Restrict)
+                        .IsRequired();
+
+                    b.Navigation("BundleSaleTemplate");
+
+                    b.Navigation("CashierUser");
+
+                    b.Navigation("Customer");
+
+                    b.Navigation("Warehouse");
+                });
+
+            modelBuilder.Entity("ERPCore.Domain.Entities.BundleSaleLine", b =>
+                {
+                    b.HasOne("ERPCore.Domain.Entities.BundleSale", "BundleSale")
+                        .WithMany("Lines")
+                        .HasForeignKey("BundleSaleId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("ERPCore.Domain.Entities.Item", "Item")
+                        .WithMany()
+                        .HasForeignKey("ItemId")
+                        .OnDelete(DeleteBehavior.Restrict)
+                        .IsRequired();
+
+                    b.HasOne("ERPCore.Domain.Entities.Warehouse", "Warehouse")
+                        .WithMany()
+                        .HasForeignKey("WarehouseId")
+                        .OnDelete(DeleteBehavior.Restrict)
+                        .IsRequired();
+
+                    b.Navigation("BundleSale");
+
+                    b.Navigation("Item");
+
+                    b.Navigation("Warehouse");
+                });
+
+            modelBuilder.Entity("ERPCore.Domain.Entities.BundleSaleTemplateLine", b =>
+                {
+                    b.HasOne("ERPCore.Domain.Entities.BundleSaleTemplate", "BundleSaleTemplate")
+                        .WithMany("Lines")
+                        .HasForeignKey("BundleSaleTemplateId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("ERPCore.Domain.Entities.Item", "Item")
+                        .WithMany()
+                        .HasForeignKey("ItemId")
+                        .OnDelete(DeleteBehavior.Restrict)
+                        .IsRequired();
+
+                    b.HasOne("ERPCore.Domain.Entities.Warehouse", "Warehouse")
+                        .WithMany()
+                        .HasForeignKey("WarehouseId")
+                        .OnDelete(DeleteBehavior.Restrict)
+                        .IsRequired();
+
+                    b.Navigation("BundleSaleTemplate");
+
+                    b.Navigation("Item");
+
+                    b.Navigation("Warehouse");
+                });
+
             modelBuilder.Entity("ERPCore.Domain.Entities.Customer", b =>
                 {
                     b.HasOne("ERPCore.Domain.Entities.Warehouse", "DefaultWarehouse")
@@ -5376,12 +5700,6 @@ namespace ERPCore.Infra.Persistence.Migrations
                         .HasForeignKey("PoLineId")
                         .OnDelete(DeleteBehavior.Restrict);
 
-                    b.HasOne("ERPCore.Domain.Entities.Uom", "Uom")
-                        .WithMany()
-                        .HasForeignKey("UomId")
-                        .OnDelete(DeleteBehavior.Restrict)
-                        .IsRequired();
-
                     b.Navigation("Batch");
 
                     b.Navigation("Bin");
@@ -5391,8 +5709,6 @@ namespace ERPCore.Infra.Persistence.Migrations
                     b.Navigation("Item");
 
                     b.Navigation("PoLine");
-
-                    b.Navigation("Uom");
                 });
 
             modelBuilder.Entity("ERPCore.Domain.Entities.Item", b =>
@@ -5599,12 +5915,6 @@ namespace ERPCore.Infra.Persistence.Migrations
                         .OnDelete(DeleteBehavior.Cascade)
                         .IsRequired();
 
-                    b.HasOne("ERPCore.Domain.Entities.Uom", "Uom")
-                        .WithMany()
-                        .HasForeignKey("UomId")
-                        .OnDelete(DeleteBehavior.Restrict)
-                        .IsRequired();
-
                     b.HasOne("ERPCore.Domain.Entities.Warehouse", "Warehouse")
                         .WithMany()
                         .HasForeignKey("WarehouseId")
@@ -5615,8 +5925,6 @@ namespace ERPCore.Infra.Persistence.Migrations
 
                     b.Navigation("PurchaseOrder");
 
-                    b.Navigation("Uom");
-
                     b.Navigation("Warehouse");
                 });
 
@@ -5937,19 +6245,11 @@ namespace ERPCore.Infra.Persistence.Migrations
                         .OnDelete(DeleteBehavior.Cascade)
                         .IsRequired();
 
-                    b.HasOne("ERPCore.Domain.Entities.Uom", "Uom")
-                        .WithMany()
-                        .HasForeignKey("UomId")
-                        .OnDelete(DeleteBehavior.Restrict)
-                        .IsRequired();
-
                     b.Navigation("FromRunOutput");
 
                     b.Navigation("Item");
 
                     b.Navigation("RunStage");
-
-                    b.Navigation("Uom");
                 });
 
             modelBuilder.Entity("ERPCore.Domain.Entities.RunStageOutput", b =>
@@ -5973,8 +6273,7 @@ namespace ERPCore.Infra.Persistence.Migrations
                     b.HasOne("ERPCore.Domain.Entities.Uom", "Uom")
                         .WithMany()
                         .HasForeignKey("UomId")
-                        .OnDelete(DeleteBehavior.Restrict)
-                        .IsRequired();
+                        .OnDelete(DeleteBehavior.Restrict);
 
                     b.Navigation("Item");
 
@@ -6024,12 +6323,6 @@ namespace ERPCore.Infra.Persistence.Migrations
                         .OnDelete(DeleteBehavior.Cascade)
                         .IsRequired();
 
-                    b.HasOne("ERPCore.Domain.Entities.Uom", "Uom")
-                        .WithMany()
-                        .HasForeignKey("UomId")
-                        .OnDelete(DeleteBehavior.Restrict)
-                        .IsRequired();
-
                     b.HasOne("ERPCore.Domain.Entities.Warehouse", "Warehouse")
                         .WithMany()
                         .HasForeignKey("WarehouseId")
@@ -6040,8 +6333,6 @@ namespace ERPCore.Infra.Persistence.Migrations
 
                     b.Navigation("SalesInvoice");
 
-                    b.Navigation("Uom");
-
                     b.Navigation("Warehouse");
                 });
 
@@ -6086,12 +6377,6 @@ namespace ERPCore.Infra.Persistence.Migrations
                         .OnDelete(DeleteBehavior.Cascade)
                         .IsRequired();
 
-                    b.HasOne("ERPCore.Domain.Entities.Uom", "Uom")
-                        .WithMany()
-                        .HasForeignKey("UomId")
-                        .OnDelete(DeleteBehavior.Restrict)
-                        .IsRequired();
-
                     b.HasOne("ERPCore.Domain.Entities.Warehouse", "Warehouse")
                         .WithMany()
                         .HasForeignKey("WarehouseId")
@@ -6102,8 +6387,6 @@ namespace ERPCore.Infra.Persistence.Migrations
 
                     b.Navigation("SalesSlip");
 
-                    b.Navigation("Uom");
-
                     b.Navigation("Warehouse");
                 });
 
@@ -6163,19 +6446,11 @@ namespace ERPCore.Infra.Persistence.Migrations
                         .OnDelete(DeleteBehavior.Cascade)
                         .IsRequired();
 
-                    b.HasOne("ERPCore.Domain.Entities.Uom", "Uom")
-                        .WithMany()
-                        .HasForeignKey("UomId")
-                        .OnDelete(DeleteBehavior.Restrict)
-                        .IsRequired();
-
                     b.Navigation("FromOutput");
 
                     b.Navigation("Item");
 
                     b.Navigation("Stage");
-
-                    b.Navigation("Uom");
                 });
 
             modelBuilder.Entity("ERPCore.Domain.Entities.StageOutput", b =>
@@ -6194,8 +6469,7 @@ namespace ERPCore.Infra.Persistence.Migrations
                     b.HasOne("ERPCore.Domain.Entities.Uom", "Uom")
                         .WithMany()
                         .HasForeignKey("UomId")
-                        .OnDelete(DeleteBehavior.Restrict)
-                        .IsRequired();
+                        .OnDelete(DeleteBehavior.Restrict);
 
                     b.Navigation("Item");
 
@@ -6483,33 +6757,6 @@ namespace ERPCore.Infra.Persistence.Migrations
                     b.Navigation("Template");
                 });
 
-            modelBuilder.Entity("ERPCore.Domain.Entities.UomConversion", b =>
-                {
-                    b.HasOne("ERPCore.Domain.Entities.Uom", "FromUom")
-                        .WithMany()
-                        .HasForeignKey("FromUomId")
-                        .OnDelete(DeleteBehavior.Restrict)
-                        .IsRequired();
-
-                    b.HasOne("ERPCore.Domain.Entities.Item", "Item")
-                        .WithMany("UomConversions")
-                        .HasForeignKey("ItemId")
-                        .OnDelete(DeleteBehavior.Cascade)
-                        .IsRequired();
-
-                    b.HasOne("ERPCore.Domain.Entities.Uom", "ToUom")
-                        .WithMany()
-                        .HasForeignKey("ToUomId")
-                        .OnDelete(DeleteBehavior.Restrict)
-                        .IsRequired();
-
-                    b.Navigation("FromUom");
-
-                    b.Navigation("Item");
-
-                    b.Navigation("ToUom");
-                });
-
             modelBuilder.Entity("ERPCore.Domain.Entities.User", b =>
                 {
                     b.HasOne("ERPCore.Domain.Entities.Role", "Role")
@@ -6558,6 +6805,16 @@ namespace ERPCore.Infra.Persistence.Migrations
                     b.Navigation("Quotation");
                 });
 
+            modelBuilder.Entity("ERPCore.Domain.Entities.BundleSale", b =>
+                {
+                    b.Navigation("Lines");
+                });
+
+            modelBuilder.Entity("ERPCore.Domain.Entities.BundleSaleTemplate", b =>
+                {
+                    b.Navigation("Lines");
+                });
+
             modelBuilder.Entity("ERPCore.Domain.Entities.Category", b =>
                 {
                     b.Navigation("SubCategories");
@@ -6581,8 +6838,6 @@ namespace ERPCore.Infra.Persistence.Migrations
             modelBuilder.Entity("ERPCore.Domain.Entities.Item", b =>
                 {
                     b.Navigation("ReorderSettings");
-
-                    b.Navigation("UomConversions");
                 });
 
             modelBuilder.Entity("ERPCore.Domain.Entities.NavItem", b =>

Backend/ERPCore/Migrations/20260811053751_initial.cs

@@ -6,10 +6,10 @@ using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
 
 #pragma warning disable CA1814 // Prefer jagged arrays over multidimensional
 
-namespace ERPCore.Infra.Persistence.Migrations
+namespace ERPCore.Migrations
 {
     /// <inheritdoc />
-    public partial class InitialCreate : Migration
+    public partial class initial : Migration
     {
         /// <inheritdoc />
         protected override void Up(MigrationBuilder migrationBuilder)
@@ -31,6 +31,25 @@ namespace ERPCore.Infra.Persistence.Migrations
                     table.PrimaryKey("PK_brands", x => x.BrandId);
                 });
 
+            migrationBuilder.CreateTable(
+                name: "bundle_sale_templates",
+                columns: table => new
+                {
+                    BundleSaleTemplateId = table.Column<int>(type: "integer", nullable: false)
+                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
+                    TemplateCode = table.Column<string>(type: "character varying(50)", maxLength: 50, nullable: false),
+                    TemplateName = table.Column<string>(type: "character varying(200)", maxLength: 200, nullable: false),
+                    Description = table.Column<string>(type: "character varying(1000)", maxLength: 1000, nullable: true),
+                    Status = table.Column<string>(type: "character varying(20)", maxLength: 20, nullable: false, defaultValue: "Active"),
+                    CreatedAt = table.Column<DateTime>(type: "timestamp with time zone", nullable: false),
+                    UpdatedAt = table.Column<DateTime>(type: "timestamp with time zone", nullable: true),
+                    ConcurrencyStamp = table.Column<int>(type: "integer", nullable: false, defaultValue: 0)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_bundle_sale_templates", x => x.BundleSaleTemplateId);
+                });
+
             migrationBuilder.CreateTable(
                 name: "categories",
                 columns: table => new
@@ -592,6 +611,10 @@ namespace ERPCore.Infra.Persistence.Migrations
                     TrackingMode = table.Column<string>(type: "character varying(20)", maxLength: 20, nullable: false),
                     TaxClass = table.Column<string>(type: "character varying(20)", maxLength: 20, nullable: true),
                     SalePrice = table.Column<decimal>(type: "numeric(18,4)", precision: 18, scale: 4, nullable: true),
+                    ContentQty = table.Column<decimal>(type: "numeric(18,4)", precision: 18, scale: 4, nullable: true),
+                    ContentUnit = table.Column<string>(type: "character varying(20)", maxLength: 20, nullable: true),
+                    ContentBaseQty = table.Column<decimal>(type: "numeric(18,4)", precision: 18, scale: 4, nullable: true),
+                    ContentBaseUnit = table.Column<string>(type: "character varying(20)", maxLength: 20, nullable: true),
                     Status = table.Column<string>(type: "character varying(20)", maxLength: 20, nullable: false, defaultValue: "Active"),
                     CreatedAt = table.Column<DateTime>(type: "timestamp with time zone", nullable: false),
                     UpdatedAt = table.Column<DateTime>(type: "timestamp with time zone", nullable: true),
@@ -903,6 +926,61 @@ namespace ERPCore.Infra.Persistence.Migrations
                         onDelete: ReferentialAction.Restrict);
                 });
 
+            migrationBuilder.CreateTable(
+                name: "bundle_sales",
+                columns: table => new
+                {
+                    BundleSaleId = table.Column<int>(type: "integer", nullable: false)
+                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
+                    BundleNo = table.Column<string>(type: "character varying(50)", maxLength: 50, nullable: false),
+                    BundleDate = table.Column<DateTime>(type: "timestamp with time zone", nullable: false),
+                    CustomerId = table.Column<int>(type: "integer", nullable: false),
+                    CustomerSnapshotName = table.Column<string>(type: "character varying(200)", maxLength: 200, nullable: false),
+                    WarehouseId = table.Column<int>(type: "integer", nullable: false),
+                    CashierUserId = table.Column<int>(type: "integer", nullable: false),
+                    BundleSaleTemplateId = table.Column<int>(type: "integer", nullable: false),
+                    BundleName = table.Column<string>(type: "character varying(200)", maxLength: 200, nullable: false),
+                    BundleCode = table.Column<string>(type: "character varying(50)", maxLength: 50, nullable: false),
+                    Status = table.Column<string>(type: "character varying(20)", maxLength: 20, nullable: false, defaultValue: "Draft"),
+                    ComponentSubtotal = table.Column<decimal>(type: "numeric(18,4)", precision: 18, scale: 4, nullable: false),
+                    BundlePrice = table.Column<decimal>(type: "numeric(18,4)", precision: 18, scale: 4, nullable: false),
+                    MarginAmount = table.Column<decimal>(type: "numeric(18,4)", precision: 18, scale: 4, nullable: false),
+                    DiscountTotal = table.Column<decimal>(type: "numeric(18,4)", precision: 18, scale: 4, nullable: false),
+                    TaxTotal = table.Column<decimal>(type: "numeric(18,4)", precision: 18, scale: 4, nullable: false),
+                    GrandTotal = table.Column<decimal>(type: "numeric(18,4)", precision: 18, scale: 4, nullable: false),
+                    CreatedAt = table.Column<DateTime>(type: "timestamp with time zone", nullable: false),
+                    UpdatedAt = table.Column<DateTime>(type: "timestamp with time zone", nullable: true),
+                    ConcurrencyStamp = table.Column<int>(type: "integer", nullable: false, defaultValue: 0)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_bundle_sales", x => x.BundleSaleId);
+                    table.ForeignKey(
+                        name: "FK_bundle_sales_bundle_sale_templates_BundleSaleTemplateId",
+                        column: x => x.BundleSaleTemplateId,
+                        principalTable: "bundle_sale_templates",
+                        principalColumn: "BundleSaleTemplateId",
+                        onDelete: ReferentialAction.Restrict);
+                    table.ForeignKey(
+                        name: "FK_bundle_sales_customers_CustomerId",
+                        column: x => x.CustomerId,
+                        principalTable: "customers",
+                        principalColumn: "CustomerId",
+                        onDelete: ReferentialAction.Restrict);
+                    table.ForeignKey(
+                        name: "FK_bundle_sales_users_CashierUserId",
+                        column: x => x.CashierUserId,
+                        principalTable: "users",
+                        principalColumn: "UserId",
+                        onDelete: ReferentialAction.Restrict);
+                    table.ForeignKey(
+                        name: "FK_bundle_sales_warehouses_WarehouseId",
+                        column: x => x.WarehouseId,
+                        principalTable: "warehouses",
+                        principalColumn: "WarehouseId",
+                        onDelete: ReferentialAction.Restrict);
+                });
+
             migrationBuilder.CreateTable(
                 name: "sales_invoices",
                 columns: table => new
@@ -1020,6 +1098,43 @@ namespace ERPCore.Infra.Persistence.Migrations
                         onDelete: ReferentialAction.Restrict);
                 });
 
+            migrationBuilder.CreateTable(
+                name: "bundle_sale_template_lines",
+                columns: table => new
+                {
+                    BundleSaleTemplateLineId = table.Column<int>(type: "integer", nullable: false)
+                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
+                    BundleSaleTemplateId = table.Column<int>(type: "integer", nullable: false),
+                    ItemId = table.Column<int>(type: "integer", nullable: false),
+                    WarehouseId = table.Column<int>(type: "integer", nullable: false),
+                    Qty = table.Column<decimal>(type: "numeric(18,4)", precision: 18, scale: 4, nullable: false),
+                    UnitPrice = table.Column<decimal>(type: "numeric(18,4)", precision: 18, scale: 4, nullable: false),
+                    IncludeInBundle = table.Column<bool>(type: "boolean", nullable: false),
+                    SortOrder = table.Column<int>(type: "integer", nullable: false, defaultValue: 0)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_bundle_sale_template_lines", x => x.BundleSaleTemplateLineId);
+                    table.ForeignKey(
+                        name: "FK_bundle_sale_template_lines_bundle_sale_templates_BundleSale~",
+                        column: x => x.BundleSaleTemplateId,
+                        principalTable: "bundle_sale_templates",
+                        principalColumn: "BundleSaleTemplateId",
+                        onDelete: ReferentialAction.Cascade);
+                    table.ForeignKey(
+                        name: "FK_bundle_sale_template_lines_items_ItemId",
+                        column: x => x.ItemId,
+                        principalTable: "items",
+                        principalColumn: "ItemId",
+                        onDelete: ReferentialAction.Restrict);
+                    table.ForeignKey(
+                        name: "FK_bundle_sale_template_lines_warehouses_WarehouseId",
+                        column: x => x.WarehouseId,
+                        principalTable: "warehouses",
+                        principalColumn: "WarehouseId",
+                        onDelete: ReferentialAction.Restrict);
+                });
+
             migrationBuilder.CreateTable(
                 name: "item_reorders",
                 columns: table => new
@@ -1069,40 +1184,6 @@ namespace ERPCore.Infra.Persistence.Migrations
                         onDelete: ReferentialAction.Restrict);
                 });
 
-            migrationBuilder.CreateTable(
-                name: "uom_conversions",
-                columns: table => new
-                {
-                    ConversionId = table.Column<int>(type: "integer", nullable: false)
-                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
-                    ItemId = table.Column<int>(type: "integer", nullable: false),
-                    FromUomId = table.Column<int>(type: "integer", nullable: false),
-                    ToUomId = table.Column<int>(type: "integer", nullable: false),
-                    Factor = table.Column<decimal>(type: "numeric(18,6)", precision: 18, scale: 6, nullable: false)
-                },
-                constraints: table =>
-                {
-                    table.PrimaryKey("PK_uom_conversions", x => x.ConversionId);
-                    table.ForeignKey(
-                        name: "FK_uom_conversions_items_ItemId",
-                        column: x => x.ItemId,
-                        principalTable: "items",
-                        principalColumn: "ItemId",
-                        onDelete: ReferentialAction.Cascade);
-                    table.ForeignKey(
-                        name: "FK_uom_conversions_uoms_FromUomId",
-                        column: x => x.FromUomId,
-                        principalTable: "uoms",
-                        principalColumn: "UomId",
-                        onDelete: ReferentialAction.Restrict);
-                    table.ForeignKey(
-                        name: "FK_uom_conversions_uoms_ToUomId",
-                        column: x => x.ToUomId,
-                        principalTable: "uoms",
-                        principalColumn: "UomId",
-                        onDelete: ReferentialAction.Restrict);
-                });
-
             migrationBuilder.CreateTable(
                 name: "role_permissions",
                 columns: table => new
@@ -1332,6 +1413,46 @@ namespace ERPCore.Infra.Persistence.Migrations
                         onDelete: ReferentialAction.Cascade);
                 });
 
+            migrationBuilder.CreateTable(
+                name: "bundle_sale_lines",
+                columns: table => new
+                {
+                    BundleSaleLineId = table.Column<int>(type: "integer", nullable: false)
+                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
+                    BundleSaleId = table.Column<int>(type: "integer", nullable: false),
+                    ItemId = table.Column<int>(type: "integer", nullable: false),
+                    Description = table.Column<string>(type: "character varying(200)", maxLength: 200, nullable: false),
+                    Qty = table.Column<decimal>(type: "numeric(18,4)", precision: 18, scale: 4, nullable: false),
+                    WarehouseId = table.Column<int>(type: "integer", nullable: false),
+                    UnitPrice = table.Column<decimal>(type: "numeric(18,4)", precision: 18, scale: 4, nullable: false),
+                    LineTotal = table.Column<decimal>(type: "numeric(18,4)", precision: 18, scale: 4, nullable: false),
+                    IncludeInBundle = table.Column<bool>(type: "boolean", nullable: false, defaultValue: true),
+                    IsComponent = table.Column<bool>(type: "boolean", nullable: false, defaultValue: true),
+                    ParentLineId = table.Column<int>(type: "integer", nullable: true)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_bundle_sale_lines", x => x.BundleSaleLineId);
+                    table.ForeignKey(
+                        name: "FK_bundle_sale_lines_bundle_sales_BundleSaleId",
+                        column: x => x.BundleSaleId,
+                        principalTable: "bundle_sales",
+                        principalColumn: "BundleSaleId",
+                        onDelete: ReferentialAction.Cascade);
+                    table.ForeignKey(
+                        name: "FK_bundle_sale_lines_items_ItemId",
+                        column: x => x.ItemId,
+                        principalTable: "items",
+                        principalColumn: "ItemId",
+                        onDelete: ReferentialAction.Restrict);
+                    table.ForeignKey(
+                        name: "FK_bundle_sale_lines_warehouses_WarehouseId",
+                        column: x => x.WarehouseId,
+                        principalTable: "warehouses",
+                        principalColumn: "WarehouseId",
+                        onDelete: ReferentialAction.Restrict);
+                });
+
             migrationBuilder.CreateTable(
                 name: "sales_invoice_lines",
                 columns: table => new
@@ -1343,7 +1464,6 @@ namespace ERPCore.Infra.Persistence.Migrations
                     Description = table.Column<string>(type: "character varying(200)", maxLength: 200, nullable: false),
                     Qty = table.Column<decimal>(type: "numeric(18,4)", precision: 18, scale: 4, nullable: false),
                     FreeQty = table.Column<decimal>(type: "numeric(18,4)", precision: 18, scale: 4, nullable: false),
-                    UomId = table.Column<int>(type: "integer", nullable: false),
                     WarehouseId = table.Column<int>(type: "integer", nullable: false),
                     UnitPrice = table.Column<decimal>(type: "numeric(18,4)", precision: 18, scale: 4, nullable: false),
                     BaseCost = table.Column<decimal>(type: "numeric(18,4)", precision: 18, scale: 4, nullable: false),
@@ -1374,12 +1494,6 @@ namespace ERPCore.Infra.Persistence.Migrations
                         principalTable: "sales_invoices",
                         principalColumn: "SalesInvoiceId",
                         onDelete: ReferentialAction.Cascade);
-                    table.ForeignKey(
-                        name: "FK_sales_invoice_lines_uoms_UomId",
-                        column: x => x.UomId,
-                        principalTable: "uoms",
-                        principalColumn: "UomId",
-                        onDelete: ReferentialAction.Restrict);
                     table.ForeignKey(
                         name: "FK_sales_invoice_lines_warehouses_WarehouseId",
                         column: x => x.WarehouseId,
@@ -1399,7 +1513,6 @@ namespace ERPCore.Infra.Persistence.Migrations
                     Description = table.Column<string>(type: "character varying(200)", maxLength: 200, nullable: false),
                     Qty = table.Column<decimal>(type: "numeric(18,4)", precision: 18, scale: 4, nullable: false),
                     FreeQty = table.Column<decimal>(type: "numeric(18,4)", precision: 18, scale: 4, nullable: false),
-                    UomId = table.Column<int>(type: "integer", nullable: false),
                     WarehouseId = table.Column<int>(type: "integer", nullable: false),
                     UnitPrice = table.Column<decimal>(type: "numeric(18,4)", precision: 18, scale: 4, nullable: false),
                     BaseCost = table.Column<decimal>(type: "numeric(18,4)", precision: 18, scale: 4, nullable: false),
@@ -1430,12 +1543,6 @@ namespace ERPCore.Infra.Persistence.Migrations
                         principalTable: "sales_slips",
                         principalColumn: "SalesSlipId",
                         onDelete: ReferentialAction.Cascade);
-                    table.ForeignKey(
-                        name: "FK_sales_slip_lines_uoms_UomId",
-                        column: x => x.UomId,
-                        principalTable: "uoms",
-                        principalColumn: "UomId",
-                        onDelete: ReferentialAction.Restrict);
                     table.ForeignKey(
                         name: "FK_sales_slip_lines_warehouses_WarehouseId",
                         column: x => x.WarehouseId,
@@ -1690,7 +1797,7 @@ namespace ERPCore.Infra.Persistence.Migrations
                     StageId = table.Column<int>(type: "integer", nullable: false),
                     ItemId = table.Column<int>(type: "integer", nullable: true),
                     Name = table.Column<string>(type: "character varying(150)", maxLength: 150, nullable: false),
-                    UomId = table.Column<int>(type: "integer", nullable: false),
+                    UomId = table.Column<int>(type: "integer", nullable: true),
                     QtyPerBatch = table.Column<decimal>(type: "numeric(18,4)", precision: 18, scale: 4, nullable: false)
                 },
                 constraints: table =>
@@ -1769,7 +1876,6 @@ namespace ERPCore.Infra.Persistence.Migrations
                         .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
                     PoId = table.Column<int>(type: "integer", nullable: false),
                     ItemId = table.Column<int>(type: "integer", nullable: false),
-                    UomId = table.Column<int>(type: "integer", nullable: false),
                     WarehouseId = table.Column<int>(type: "integer", nullable: false),
                     Qty = table.Column<decimal>(type: "numeric(18,4)", precision: 18, scale: 4, nullable: false),
                     UnitPrice = table.Column<decimal>(type: "numeric(18,4)", precision: 18, scale: 4, nullable: false),
@@ -1791,12 +1897,6 @@ namespace ERPCore.Infra.Persistence.Migrations
                         principalTable: "purchase_orders",
                         principalColumn: "PoId",
                         onDelete: ReferentialAction.Cascade);
-                    table.ForeignKey(
-                        name: "FK_po_lines_uoms_UomId",
-                        column: x => x.UomId,
-                        principalTable: "uoms",
-                        principalColumn: "UomId",
-                        onDelete: ReferentialAction.Restrict);
                     table.ForeignKey(
                         name: "FK_po_lines_warehouses_WarehouseId",
                         column: x => x.WarehouseId,
@@ -1938,7 +2038,7 @@ namespace ERPCore.Infra.Persistence.Migrations
                     RunStageId = table.Column<int>(type: "integer", nullable: false),
                     ItemId = table.Column<int>(type: "integer", nullable: true),
                     Name = table.Column<string>(type: "character varying(150)", maxLength: 150, nullable: false),
-                    UomId = table.Column<int>(type: "integer", nullable: false),
+                    UomId = table.Column<int>(type: "integer", nullable: true),
                     PlannedQty = table.Column<decimal>(type: "numeric(18,4)", precision: 18, scale: 4, nullable: false),
                     ProducedQty = table.Column<decimal>(type: "numeric(18,4)", precision: 18, scale: 4, nullable: false),
                     ScrappedQty = table.Column<decimal>(type: "numeric(18,4)", precision: 18, scale: 4, nullable: false),
@@ -1984,7 +2084,7 @@ namespace ERPCore.Infra.Persistence.Migrations
                     Source = table.Column<string>(type: "character varying(20)", maxLength: 20, nullable: false),
                     ItemId = table.Column<int>(type: "integer", nullable: true),
                     FromOutputId = table.Column<int>(type: "integer", nullable: true),
-                    UomId = table.Column<int>(type: "integer", nullable: false),
+                    QtyUnit = table.Column<string>(type: "character varying(20)", maxLength: 20, nullable: false),
                     QtyPerBatch = table.Column<decimal>(type: "numeric(18,4)", precision: 18, scale: 4, nullable: false)
                 },
                 constraints: table =>
@@ -2008,12 +2108,6 @@ namespace ERPCore.Infra.Persistence.Migrations
                         principalTable: "template_stages",
                         principalColumn: "StageId",
                         onDelete: ReferentialAction.Cascade);
-                    table.ForeignKey(
-                        name: "FK_stage_inputs_uoms_UomId",
-                        column: x => x.UomId,
-                        principalTable: "uoms",
-                        principalColumn: "UomId",
-                        onDelete: ReferentialAction.Restrict);
                 });
 
             migrationBuilder.CreateTable(
@@ -2025,7 +2119,6 @@ namespace ERPCore.Infra.Persistence.Migrations
                     GrnId = table.Column<int>(type: "integer", nullable: false),
                     PoLineId = table.Column<int>(type: "integer", nullable: true),
                     ItemId = table.Column<int>(type: "integer", nullable: false),
-                    UomId = table.Column<int>(type: "integer", nullable: false),
                     BinId = table.Column<int>(type: "integer", nullable: true),
                     BatchId = table.Column<int>(type: "integer", nullable: true),
                     Qty = table.Column<decimal>(type: "numeric(18,4)", precision: 18, scale: 4, nullable: false),
@@ -2072,12 +2165,6 @@ namespace ERPCore.Infra.Persistence.Migrations
                         principalTable: "po_lines",
                         principalColumn: "PoLineId",
                         onDelete: ReferentialAction.Restrict);
-                    table.ForeignKey(
-                        name: "FK_grn_lines_uoms_UomId",
-                        column: x => x.UomId,
-                        principalTable: "uoms",
-                        principalColumn: "UomId",
-                        onDelete: ReferentialAction.Restrict);
                 });
 
             migrationBuilder.CreateTable(
@@ -2118,7 +2205,7 @@ namespace ERPCore.Infra.Persistence.Migrations
                     Source = table.Column<string>(type: "character varying(20)", maxLength: 20, nullable: false),
                     ItemId = table.Column<int>(type: "integer", nullable: true),
                     FromRunOutputId = table.Column<int>(type: "integer", nullable: true),
-                    UomId = table.Column<int>(type: "integer", nullable: false),
+                    QtyUnit = table.Column<string>(type: "character varying(20)", maxLength: 20, nullable: false),
                     PlannedQty = table.Column<decimal>(type: "numeric(18,4)", precision: 18, scale: 4, nullable: false),
                     ConsumedQty = table.Column<decimal>(type: "numeric(18,4)", precision: 18, scale: 4, nullable: false),
                     ConsumedValue = table.Column<decimal>(type: "numeric(18,4)", precision: 18, scale: 4, nullable: false),
@@ -2147,12 +2234,6 @@ namespace ERPCore.Infra.Persistence.Migrations
                         principalTable: "run_stages",
                         principalColumn: "RunStageId",
                         onDelete: ReferentialAction.Cascade);
-                    table.ForeignKey(
-                        name: "FK_run_stage_inputs_uoms_UomId",
-                        column: x => x.UomId,
-                        principalTable: "uoms",
-                        principalColumn: "UomId",
-                        onDelete: ReferentialAction.Restrict);
                 });
 
             migrationBuilder.CreateTable(
@@ -2782,7 +2863,8 @@ namespace ERPCore.Infra.Persistence.Migrations
                     { 9, "settings", "/dashboard/settings", null, "Settings", 9 },
                     { 10, "help", "/dashboard/help", null, "Help", 10 },
                     { 11, "ledgers", "/dashboard/ledgers", null, "Ledgers", 11 },
-                    { 12, "accounts", "/dashboard/accounts", null, "Accounts", 12 }
+                    { 12, "accounts", "/dashboard/accounts", null, "Accounts", 12 },
+                    { 13, "sales", "/dashboard/sales", null, "Sales", 13 }
                 });
 
             migrationBuilder.InsertData(
@@ -2835,7 +2917,8 @@ namespace ERPCore.Infra.Persistence.Migrations
                     { 19, "procurement.purchase-orders", "/dashboard/procurement/purchase-orders", null, "Purchase Orders", 4, 3 },
                     { 20, "procurement.purchase-returns", "/dashboard/procurement/purchase-returns", null, "Purchase Returns", 4, 4 },
                     { 21, "accounts.cheque-books", "/dashboard/accounts/cheque-books", null, "Cheque Books", 12, 2 },
-                    { 22, "accounts.received-cheques", "/dashboard/accounts/received-cheques", null, "Received Cheques", 12, 3 }
+                    { 22, "accounts.received-cheques", "/dashboard/accounts/received-cheques", null, "Received Cheques", 12, 3 },
+                    { 23, "sales.bundle-sales", "/dashboard/sales/bundles", null, "Bundle Sales", 13, 1 }
                 });
 
             migrationBuilder.InsertData(
@@ -2905,6 +2988,68 @@ namespace ERPCore.Infra.Persistence.Migrations
                 table: "brands",
                 column: "Status");
 
+            migrationBuilder.CreateIndex(
+                name: "IX_bundle_sale_lines_BundleSaleId",
+                table: "bundle_sale_lines",
+                column: "BundleSaleId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_bundle_sale_lines_ItemId",
+                table: "bundle_sale_lines",
+                column: "ItemId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_bundle_sale_lines_WarehouseId",
+                table: "bundle_sale_lines",
+                column: "WarehouseId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_bundle_sale_template_lines_BundleSaleTemplateId",
+                table: "bundle_sale_template_lines",
+                column: "BundleSaleTemplateId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_bundle_sale_template_lines_ItemId",
+                table: "bundle_sale_template_lines",
+                column: "ItemId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_bundle_sale_template_lines_WarehouseId",
+                table: "bundle_sale_template_lines",
+                column: "WarehouseId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_bundle_sale_templates_TemplateCode",
+                table: "bundle_sale_templates",
+                column: "TemplateCode",
+                unique: true);
+
+            migrationBuilder.CreateIndex(
+                name: "IX_bundle_sales_BundleNo",
+                table: "bundle_sales",
+                column: "BundleNo",
+                unique: true);
+
+            migrationBuilder.CreateIndex(
+                name: "IX_bundle_sales_BundleSaleTemplateId",
+                table: "bundle_sales",
+                column: "BundleSaleTemplateId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_bundle_sales_CashierUserId",
+                table: "bundle_sales",
+                column: "CashierUserId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_bundle_sales_CustomerId",
+                table: "bundle_sales",
+                column: "CustomerId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_bundle_sales_WarehouseId",
+                table: "bundle_sales",
+                column: "WarehouseId");
+
             migrationBuilder.CreateIndex(
                 name: "IX_categories_Name",
                 table: "categories",
@@ -2962,11 +3107,6 @@ namespace ERPCore.Infra.Persistence.Migrations
                 table: "grn_lines",
                 column: "PoLineId");
 
-            migrationBuilder.CreateIndex(
-                name: "IX_grn_lines_UomId",
-                table: "grn_lines",
-                column: "UomId");
-
             migrationBuilder.CreateIndex(
                 name: "IX_grns_CreatedBy",
                 table: "grns",
@@ -3446,11 +3586,6 @@ namespace ERPCore.Infra.Persistence.Migrations
                 table: "po_lines",
                 column: "PoId");
 
-            migrationBuilder.CreateIndex(
-                name: "IX_po_lines_UomId",
-                table: "po_lines",
-                column: "UomId");
-
             migrationBuilder.CreateIndex(
                 name: "IX_po_lines_WarehouseId",
                 table: "po_lines",
@@ -3696,11 +3831,6 @@ namespace ERPCore.Infra.Persistence.Migrations
                 table: "run_stage_inputs",
                 column: "RunStageId");
 
-            migrationBuilder.CreateIndex(
-                name: "IX_run_stage_inputs_UomId",
-                table: "run_stage_inputs",
-                column: "UomId");
-
             migrationBuilder.CreateIndex(
                 name: "IX_run_stage_outputs_ItemId",
                 table: "run_stage_outputs",
@@ -3741,11 +3871,6 @@ namespace ERPCore.Infra.Persistence.Migrations
                 table: "sales_invoice_lines",
                 column: "SalesInvoiceId");
 
-            migrationBuilder.CreateIndex(
-                name: "IX_sales_invoice_lines_UomId",
-                table: "sales_invoice_lines",
-                column: "UomId");
-
             migrationBuilder.CreateIndex(
                 name: "IX_sales_invoice_lines_WarehouseId",
                 table: "sales_invoice_lines",
@@ -3792,11 +3917,6 @@ namespace ERPCore.Infra.Persistence.Migrations
                 table: "sales_slip_lines",
                 column: "SalesSlipId");
 
-            migrationBuilder.CreateIndex(
-                name: "IX_sales_slip_lines_UomId",
-                table: "sales_slip_lines",
-                column: "UomId");
-
             migrationBuilder.CreateIndex(
                 name: "IX_sales_slip_lines_WarehouseId",
                 table: "sales_slip_lines",
@@ -3870,11 +3990,6 @@ namespace ERPCore.Infra.Persistence.Migrations
                 table: "stage_inputs",
                 column: "StageId");
 
-            migrationBuilder.CreateIndex(
-                name: "IX_stage_inputs_UomId",
-                table: "stage_inputs",
-                column: "UomId");
-
             migrationBuilder.CreateIndex(
                 name: "IX_stage_outputs_ItemId",
                 table: "stage_outputs",
@@ -4120,22 +4235,6 @@ namespace ERPCore.Infra.Persistence.Migrations
                 table: "template_stages",
                 column: "TemplateId");
 
-            migrationBuilder.CreateIndex(
-                name: "IX_uom_conversions_FromUomId",
-                table: "uom_conversions",
-                column: "FromUomId");
-
-            migrationBuilder.CreateIndex(
-                name: "IX_uom_conversions_ItemId_FromUomId_ToUomId",
-                table: "uom_conversions",
-                columns: new[] { "ItemId", "FromUomId", "ToUomId" },
-                unique: true);
-
-            migrationBuilder.CreateIndex(
-                name: "IX_uom_conversions_ToUomId",
-                table: "uom_conversions",
-                column: "ToUomId");
-
             migrationBuilder.CreateIndex(
                 name: "IX_uoms_Name",
                 table: "uoms",
@@ -4234,6 +4333,12 @@ namespace ERPCore.Infra.Persistence.Migrations
             migrationBuilder.DropTable(
                 name: "audit_logs");
 
+            migrationBuilder.DropTable(
+                name: "bundle_sale_lines");
+
+            migrationBuilder.DropTable(
+                name: "bundle_sale_template_lines");
+
             migrationBuilder.DropTable(
                 name: "hr_attendance_records");
 
@@ -4331,10 +4436,10 @@ namespace ERPCore.Infra.Persistence.Migrations
                 name: "stock_transfer_lines");
 
             migrationBuilder.DropTable(
-                name: "uom_conversions");
+                name: "vendor_quotation_lines");
 
             migrationBuilder.DropTable(
-                name: "vendor_quotation_lines");
+                name: "bundle_sales");
 
             migrationBuilder.DropTable(
                 name: "hr_attendance_upload_batches");
@@ -4393,6 +4498,9 @@ namespace ERPCore.Infra.Persistence.Migrations
             migrationBuilder.DropTable(
                 name: "vendor_quotations");
 
+            migrationBuilder.DropTable(
+                name: "bundle_sale_templates");
+
             migrationBuilder.DropTable(
                 name: "hr_payroll_runs");
 

Backend/ERPCore/Migrations/20260811095944_AddItemTypeIsMeasurable.Designer.cs

@@ -3,17 +3,20 @@ using System;
 using ERPCore.Infra.Persistence;
 using Microsoft.EntityFrameworkCore;
 using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
 using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
 using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
 
 #nullable disable
 
-namespace ERPCore.Infra.Persistence.Migrations
+namespace ERPCore.Migrations
 {
     [DbContext(typeof(ErpDbContext))]
-    partial class ErpDbContextModelSnapshot : ModelSnapshot
+    [Migration("20260811095944_AddItemTypeIsMeasurable")]
+    partial class AddItemTypeIsMeasurable
     {
-        protected override void BuildModel(ModelBuilder modelBuilder)
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
         {
 #pragma warning disable 612, 618
             modelBuilder
@@ -365,6 +368,259 @@ namespace ERPCore.Infra.Persistence.Migrations
                     b.ToTable("brands", (string)null);
                 });
 
+            modelBuilder.Entity("ERPCore.Domain.Entities.BundleSale", b =>
+                {
+                    b.Property<int>("BundleSaleId")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("BundleSaleId"));
+
+                    b.Property<string>("BundleCode")
+                        .IsRequired()
+                        .HasMaxLength(50)
+                        .HasColumnType("character varying(50)");
+
+                    b.Property<DateTime>("BundleDate")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("BundleName")
+                        .IsRequired()
+                        .HasMaxLength(200)
+                        .HasColumnType("character varying(200)");
+
+                    b.Property<string>("BundleNo")
+                        .IsRequired()
+                        .HasMaxLength(50)
+                        .HasColumnType("character varying(50)");
+
+                    b.Property<decimal>("BundlePrice")
+                        .HasPrecision(18, 4)
+                        .HasColumnType("numeric(18,4)");
+
+                    b.Property<int>("BundleSaleTemplateId")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("CashierUserId")
+                        .HasColumnType("integer");
+
+                    b.Property<decimal>("ComponentSubtotal")
+                        .HasPrecision(18, 4)
+                        .HasColumnType("numeric(18,4)");
+
+                    b.Property<int>("ConcurrencyStamp")
+                        .IsConcurrencyToken()
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer")
+                        .HasDefaultValue(0);
+
+                    b.Property<DateTime>("CreatedAt")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<int>("CustomerId")
+                        .HasColumnType("integer");
+
+                    b.Property<string>("CustomerSnapshotName")
+                        .IsRequired()
+                        .HasMaxLength(200)
+                        .HasColumnType("character varying(200)");
+
+                    b.Property<decimal>("DiscountTotal")
+                        .HasPrecision(18, 4)
+                        .HasColumnType("numeric(18,4)");
+
+                    b.Property<decimal>("GrandTotal")
+                        .HasPrecision(18, 4)
+                        .HasColumnType("numeric(18,4)");
+
+                    b.Property<decimal>("MarginAmount")
+                        .HasPrecision(18, 4)
+                        .HasColumnType("numeric(18,4)");
+
+                    b.Property<string>("Status")
+                        .IsRequired()
+                        .ValueGeneratedOnAdd()
+                        .HasMaxLength(20)
+                        .HasColumnType("character varying(20)")
+                        .HasDefaultValue("Draft");
+
+                    b.Property<decimal>("TaxTotal")
+                        .HasPrecision(18, 4)
+                        .HasColumnType("numeric(18,4)");
+
+                    b.Property<DateTime?>("UpdatedAt")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<int>("WarehouseId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("BundleSaleId");
+
+                    b.HasIndex("BundleNo")
+                        .IsUnique();
+
+                    b.HasIndex("BundleSaleTemplateId");
+
+                    b.HasIndex("CashierUserId");
+
+                    b.HasIndex("CustomerId");
+
+                    b.HasIndex("WarehouseId");
+
+                    b.ToTable("bundle_sales", (string)null);
+                });
+
+            modelBuilder.Entity("ERPCore.Domain.Entities.BundleSaleLine", b =>
+                {
+                    b.Property<int>("BundleSaleLineId")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("BundleSaleLineId"));
+
+                    b.Property<int>("BundleSaleId")
+                        .HasColumnType("integer");
+
+                    b.Property<string>("Description")
+                        .IsRequired()
+                        .HasMaxLength(200)
+                        .HasColumnType("character varying(200)");
+
+                    b.Property<bool>("IncludeInBundle")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("boolean")
+                        .HasDefaultValue(true);
+
+                    b.Property<bool>("IsComponent")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("boolean")
+                        .HasDefaultValue(true);
+
+                    b.Property<int>("ItemId")
+                        .HasColumnType("integer");
+
+                    b.Property<decimal>("LineTotal")
+                        .HasPrecision(18, 4)
+                        .HasColumnType("numeric(18,4)");
+
+                    b.Property<int?>("ParentLineId")
+                        .HasColumnType("integer");
+
+                    b.Property<decimal>("Qty")
+                        .HasPrecision(18, 4)
+                        .HasColumnType("numeric(18,4)");
+
+                    b.Property<decimal>("UnitPrice")
+                        .HasPrecision(18, 4)
+                        .HasColumnType("numeric(18,4)");
+
+                    b.Property<int>("WarehouseId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("BundleSaleLineId");
+
+                    b.HasIndex("BundleSaleId");
+
+                    b.HasIndex("ItemId");
+
+                    b.HasIndex("WarehouseId");
+
+                    b.ToTable("bundle_sale_lines", (string)null);
+                });
+
+            modelBuilder.Entity("ERPCore.Domain.Entities.BundleSaleTemplate", b =>
+                {
+                    b.Property<int>("BundleSaleTemplateId")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("BundleSaleTemplateId"));
+
+                    b.Property<int>("ConcurrencyStamp")
+                        .IsConcurrencyToken()
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer")
+                        .HasDefaultValue(0);
+
+                    b.Property<DateTime>("CreatedAt")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("Description")
+                        .HasMaxLength(1000)
+                        .HasColumnType("character varying(1000)");
+
+                    b.Property<string>("Status")
+                        .IsRequired()
+                        .ValueGeneratedOnAdd()
+                        .HasMaxLength(20)
+                        .HasColumnType("character varying(20)")
+                        .HasDefaultValue("Active");
+
+                    b.Property<string>("TemplateCode")
+                        .IsRequired()
+                        .HasMaxLength(50)
+                        .HasColumnType("character varying(50)");
+
+                    b.Property<string>("TemplateName")
+                        .IsRequired()
+                        .HasMaxLength(200)
+                        .HasColumnType("character varying(200)");
+
+                    b.Property<DateTime?>("UpdatedAt")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.HasKey("BundleSaleTemplateId");
+
+                    b.HasIndex("TemplateCode")
+                        .IsUnique();
+
+                    b.ToTable("bundle_sale_templates", (string)null);
+                });
+
+            modelBuilder.Entity("ERPCore.Domain.Entities.BundleSaleTemplateLine", b =>
+                {
+                    b.Property<int>("BundleSaleTemplateLineId")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("BundleSaleTemplateLineId"));
+
+                    b.Property<int>("BundleSaleTemplateId")
+                        .HasColumnType("integer");
+
+                    b.Property<bool>("IncludeInBundle")
+                        .HasColumnType("boolean");
+
+                    b.Property<int>("ItemId")
+                        .HasColumnType("integer");
+
+                    b.Property<decimal>("Qty")
+                        .HasPrecision(18, 4)
+                        .HasColumnType("numeric(18,4)");
+
+                    b.Property<int>("SortOrder")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer")
+                        .HasDefaultValue(0);
+
+                    b.Property<decimal>("UnitPrice")
+                        .HasPrecision(18, 4)
+                        .HasColumnType("numeric(18,4)");
+
+                    b.Property<int>("WarehouseId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("BundleSaleTemplateLineId");
+
+                    b.HasIndex("BundleSaleTemplateId");
+
+                    b.HasIndex("ItemId");
+
+                    b.HasIndex("WarehouseId");
+
+                    b.ToTable("bundle_sale_template_lines", (string)null);
+                });
+
             modelBuilder.Entity("ERPCore.Domain.Entities.Category", b =>
                 {
                     b.Property<int>("CategoryId")
@@ -1261,9 +1517,6 @@ namespace ERPCore.Infra.Persistence.Migrations
                         .HasPrecision(18, 6)
                         .HasColumnType("numeric(18,6)");
 
-                    b.Property<int>("UomId")
-                        .HasColumnType("integer");
-
                     b.Property<decimal>("VatAmount")
                         .HasPrecision(18, 4)
                         .HasColumnType("numeric(18,4)");
@@ -1284,8 +1537,6 @@ namespace ERPCore.Infra.Persistence.Migrations
 
                     b.HasIndex("PoLineId");
 
-                    b.HasIndex("UomId");
-
                     b.ToTable("grn_lines", (string)null);
                 });
 
@@ -1364,6 +1615,22 @@ namespace ERPCore.Infra.Persistence.Migrations
                     b.Property<int>("CategoryId")
                         .HasColumnType("integer");
 
+                    b.Property<decimal?>("ContentBaseQty")
+                        .HasPrecision(18, 4)
+                        .HasColumnType("numeric(18,4)");
+
+                    b.Property<string>("ContentBaseUnit")
+                        .HasMaxLength(20)
+                        .HasColumnType("character varying(20)");
+
+                    b.Property<decimal?>("ContentQty")
+                        .HasPrecision(18, 4)
+                        .HasColumnType("numeric(18,4)");
+
+                    b.Property<string>("ContentUnit")
+                        .HasMaxLength(20)
+                        .HasColumnType("character varying(20)");
+
                     b.Property<DateTime>("CreatedAt")
                         .HasColumnType("timestamp with time zone");
 
@@ -1484,6 +1751,11 @@ namespace ERPCore.Infra.Persistence.Migrations
                     b.Property<DateTime>("CreatedAt")
                         .HasColumnType("timestamp with time zone");
 
+                    b.Property<bool>("IsMeasurable")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("boolean")
+                        .HasDefaultValue(false);
+
                     b.Property<string>("Name")
                         .IsRequired()
                         .HasMaxLength(200)
@@ -1950,6 +2222,15 @@ namespace ERPCore.Infra.Persistence.Migrations
                             Label = "Accounts",
                             SortOrder = 12,
                             Status = "Active"
+                        },
+                        new
+                        {
+                            NavItemId = 13,
+                            Code = "sales",
+                            Href = "/dashboard/sales",
+                            Label = "Sales",
+                            SortOrder = 13,
+                            Status = "Active"
                         });
                 });
 
@@ -2529,9 +2810,6 @@ namespace ERPCore.Infra.Persistence.Migrations
                         .HasPrecision(18, 4)
                         .HasColumnType("numeric(18,4)");
 
-                    b.Property<int>("UomId")
-                        .HasColumnType("integer");
-
                     b.Property<int>("WarehouseId")
                         .HasColumnType("integer");
 
@@ -2541,8 +2819,6 @@ namespace ERPCore.Infra.Persistence.Migrations
 
                     b.HasIndex("PoId");
 
-                    b.HasIndex("UomId");
-
                     b.HasIndex("WarehouseId");
 
                     b.ToTable("po_lines", (string)null);
@@ -3258,6 +3534,11 @@ namespace ERPCore.Infra.Persistence.Migrations
                         .HasPrecision(18, 4)
                         .HasColumnType("numeric(18,4)");
 
+                    b.Property<string>("QtyUnit")
+                        .IsRequired()
+                        .HasMaxLength(20)
+                        .HasColumnType("character varying(20)");
+
                     b.Property<decimal>("ReturnedQty")
                         .HasPrecision(18, 4)
                         .HasColumnType("numeric(18,4)");
@@ -3274,9 +3555,6 @@ namespace ERPCore.Infra.Persistence.Migrations
                         .HasMaxLength(20)
                         .HasColumnType("character varying(20)");
 
-                    b.Property<int>("UomId")
-                        .HasColumnType("integer");
-
                     b.HasKey("RunInputId");
 
                     b.HasIndex("FromRunOutputId");
@@ -3285,8 +3563,6 @@ namespace ERPCore.Infra.Persistence.Migrations
 
                     b.HasIndex("RunStageId");
 
-                    b.HasIndex("UomId");
-
                     b.ToTable("run_stage_inputs", (string)null);
                 });
 
@@ -3328,7 +3604,7 @@ namespace ERPCore.Infra.Persistence.Migrations
                         .HasPrecision(18, 4)
                         .HasColumnType("numeric(18,4)");
 
-                    b.Property<int>("UomId")
+                    b.Property<int?>("UomId")
                         .HasColumnType("integer");
 
                     b.HasKey("RunOutputId");
@@ -3594,9 +3870,6 @@ namespace ERPCore.Infra.Persistence.Migrations
                         .HasPrecision(18, 4)
                         .HasColumnType("numeric(18,4)");
 
-                    b.Property<int>("UomId")
-                        .HasColumnType("integer");
-
                     b.Property<int>("WarehouseId")
                         .HasColumnType("integer");
 
@@ -3606,8 +3879,6 @@ namespace ERPCore.Infra.Persistence.Migrations
 
                     b.HasIndex("SalesInvoiceId");
 
-                    b.HasIndex("UomId");
-
                     b.HasIndex("WarehouseId");
 
                     b.ToTable("sales_invoice_lines", (string)null);
@@ -3783,9 +4054,6 @@ namespace ERPCore.Infra.Persistence.Migrations
                         .HasPrecision(18, 4)
                         .HasColumnType("numeric(18,4)");
 
-                    b.Property<int>("UomId")
-                        .HasColumnType("integer");
-
                     b.Property<int>("WarehouseId")
                         .HasColumnType("integer");
 
@@ -3795,8 +4063,6 @@ namespace ERPCore.Infra.Persistence.Migrations
 
                     b.HasIndex("SalesSlipId");
 
-                    b.HasIndex("UomId");
-
                     b.HasIndex("WarehouseId");
 
                     b.ToTable("sales_slip_lines", (string)null);
@@ -3878,6 +4144,11 @@ namespace ERPCore.Infra.Persistence.Migrations
                         .HasPrecision(18, 4)
                         .HasColumnType("numeric(18,4)");
 
+                    b.Property<string>("QtyUnit")
+                        .IsRequired()
+                        .HasMaxLength(20)
+                        .HasColumnType("character varying(20)");
+
                     b.Property<string>("Source")
                         .IsRequired()
                         .HasMaxLength(20)
@@ -3886,9 +4157,6 @@ namespace ERPCore.Infra.Persistence.Migrations
                     b.Property<int>("StageId")
                         .HasColumnType("integer");
 
-                    b.Property<int>("UomId")
-                        .HasColumnType("integer");
-
                     b.HasKey("InputId");
 
                     b.HasIndex("FromOutputId");
@@ -3897,8 +4165,6 @@ namespace ERPCore.Infra.Persistence.Migrations
 
                     b.HasIndex("StageId");
 
-                    b.HasIndex("UomId");
-
                     b.ToTable("stage_inputs", (string)null);
                 });
 
@@ -3925,7 +4191,7 @@ namespace ERPCore.Infra.Persistence.Migrations
                     b.Property<int>("StageId")
                         .HasColumnType("integer");
 
-                    b.Property<int>("UomId")
+                    b.Property<int?>("UomId")
                         .HasColumnType("integer");
 
                     b.HasKey("OutputId");
@@ -4537,6 +4803,16 @@ namespace ERPCore.Infra.Persistence.Migrations
                             Status = "Active"
                         },
                         new
+                        {
+                            SubNavItemId = 23,
+                            Code = "sales.bundle-sales",
+                            Href = "/dashboard/sales/bundles",
+                            Label = "Bundle Sales",
+                            NavItemId = 13,
+                            SortOrder = 1,
+                            Status = "Active"
+                        },
+                        new
                         {
                             SubNavItemId = 17,
                             Code = "procurement.requisitions",
@@ -4783,39 +5059,6 @@ namespace ERPCore.Infra.Persistence.Migrations
                     b.ToTable("uoms", (string)null);
                 });
 
-            modelBuilder.Entity("ERPCore.Domain.Entities.UomConversion", b =>
-                {
-                    b.Property<int>("ConversionId")
-                        .ValueGeneratedOnAdd()
-                        .HasColumnType("integer");
-
-                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("ConversionId"));
-
-                    b.Property<decimal>("Factor")
-                        .HasPrecision(18, 6)
-                        .HasColumnType("numeric(18,6)");
-
-                    b.Property<int>("FromUomId")
-                        .HasColumnType("integer");
-
-                    b.Property<int>("ItemId")
-                        .HasColumnType("integer");
-
-                    b.Property<int>("ToUomId")
-                        .HasColumnType("integer");
-
-                    b.HasKey("ConversionId");
-
-                    b.HasIndex("FromUomId");
-
-                    b.HasIndex("ToUomId");
-
-                    b.HasIndex("ItemId", "FromUomId", "ToUomId")
-                        .IsUnique();
-
-                    b.ToTable("uom_conversions", (string)null);
-                });
-
             modelBuilder.Entity("ERPCore.Domain.Entities.User", b =>
                 {
                     b.Property<int>("UserId")
@@ -5149,6 +5392,95 @@ namespace ERPCore.Infra.Persistence.Migrations
                     b.Navigation("Warehouse");
                 });
 
+            modelBuilder.Entity("ERPCore.Domain.Entities.BundleSale", b =>
+                {
+                    b.HasOne("ERPCore.Domain.Entities.BundleSaleTemplate", "BundleSaleTemplate")
+                        .WithMany()
+                        .HasForeignKey("BundleSaleTemplateId")
+                        .OnDelete(DeleteBehavior.Restrict)
+                        .IsRequired();
+
+                    b.HasOne("ERPCore.Domain.Entities.User", "CashierUser")
+                        .WithMany()
+                        .HasForeignKey("CashierUserId")
+                        .OnDelete(DeleteBehavior.Restrict)
+                        .IsRequired();
+
+                    b.HasOne("ERPCore.Domain.Entities.Customer", "Customer")
+                        .WithMany()
+                        .HasForeignKey("CustomerId")
+                        .OnDelete(DeleteBehavior.Restrict)
+                        .IsRequired();
+
+                    b.HasOne("ERPCore.Domain.Entities.Warehouse", "Warehouse")
+                        .WithMany()
+                        .HasForeignKey("WarehouseId")
+                        .OnDelete(DeleteBehavior.Restrict)
+                        .IsRequired();
+
+                    b.Navigation("BundleSaleTemplate");
+
+                    b.Navigation("CashierUser");
+
+                    b.Navigation("Customer");
+
+                    b.Navigation("Warehouse");
+                });
+
+            modelBuilder.Entity("ERPCore.Domain.Entities.BundleSaleLine", b =>
+                {
+                    b.HasOne("ERPCore.Domain.Entities.BundleSale", "BundleSale")
+                        .WithMany("Lines")
+                        .HasForeignKey("BundleSaleId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("ERPCore.Domain.Entities.Item", "Item")
+                        .WithMany()
+                        .HasForeignKey("ItemId")
+                        .OnDelete(DeleteBehavior.Restrict)
+                        .IsRequired();
+
+                    b.HasOne("ERPCore.Domain.Entities.Warehouse", "Warehouse")
+                        .WithMany()
+                        .HasForeignKey("WarehouseId")
+                        .OnDelete(DeleteBehavior.Restrict)
+                        .IsRequired();
+
+                    b.Navigation("BundleSale");
+
+                    b.Navigation("Item");
+
+                    b.Navigation("Warehouse");
+                });
+
+            modelBuilder.Entity("ERPCore.Domain.Entities.BundleSaleTemplateLine", b =>
+                {
+                    b.HasOne("ERPCore.Domain.Entities.BundleSaleTemplate", "BundleSaleTemplate")
+                        .WithMany("Lines")
+                        .HasForeignKey("BundleSaleTemplateId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("ERPCore.Domain.Entities.Item", "Item")
+                        .WithMany()
+                        .HasForeignKey("ItemId")
+                        .OnDelete(DeleteBehavior.Restrict)
+                        .IsRequired();
+
+                    b.HasOne("ERPCore.Domain.Entities.Warehouse", "Warehouse")
+                        .WithMany()
+                        .HasForeignKey("WarehouseId")
+                        .OnDelete(DeleteBehavior.Restrict)
+                        .IsRequired();
+
+                    b.Navigation("BundleSaleTemplate");
+
+                    b.Navigation("Item");
+
+                    b.Navigation("Warehouse");
+                });
+
             modelBuilder.Entity("ERPCore.Domain.Entities.Customer", b =>
                 {
                     b.HasOne("ERPCore.Domain.Entities.Warehouse", "DefaultWarehouse")
@@ -5373,12 +5705,6 @@ namespace ERPCore.Infra.Persistence.Migrations
                         .HasForeignKey("PoLineId")
                         .OnDelete(DeleteBehavior.Restrict);
 
-                    b.HasOne("ERPCore.Domain.Entities.Uom", "Uom")
-                        .WithMany()
-                        .HasForeignKey("UomId")
-                        .OnDelete(DeleteBehavior.Restrict)
-                        .IsRequired();
-
                     b.Navigation("Batch");
 
                     b.Navigation("Bin");
@@ -5388,8 +5714,6 @@ namespace ERPCore.Infra.Persistence.Migrations
                     b.Navigation("Item");
 
                     b.Navigation("PoLine");
-
-                    b.Navigation("Uom");
                 });
 
             modelBuilder.Entity("ERPCore.Domain.Entities.Item", b =>
@@ -5596,12 +5920,6 @@ namespace ERPCore.Infra.Persistence.Migrations
                         .OnDelete(DeleteBehavior.Cascade)
                         .IsRequired();
 
-                    b.HasOne("ERPCore.Domain.Entities.Uom", "Uom")
-                        .WithMany()
-                        .HasForeignKey("UomId")
-                        .OnDelete(DeleteBehavior.Restrict)
-                        .IsRequired();
-
                     b.HasOne("ERPCore.Domain.Entities.Warehouse", "Warehouse")
                         .WithMany()
                         .HasForeignKey("WarehouseId")
@@ -5612,8 +5930,6 @@ namespace ERPCore.Infra.Persistence.Migrations
 
                     b.Navigation("PurchaseOrder");
 
-                    b.Navigation("Uom");
-
                     b.Navigation("Warehouse");
                 });
 
@@ -5934,19 +6250,11 @@ namespace ERPCore.Infra.Persistence.Migrations
                         .OnDelete(DeleteBehavior.Cascade)
                         .IsRequired();
 
-                    b.HasOne("ERPCore.Domain.Entities.Uom", "Uom")
-                        .WithMany()
-                        .HasForeignKey("UomId")
-                        .OnDelete(DeleteBehavior.Restrict)
-                        .IsRequired();
-
                     b.Navigation("FromRunOutput");
 
                     b.Navigation("Item");
 
                     b.Navigation("RunStage");
-
-                    b.Navigation("Uom");
                 });
 
             modelBuilder.Entity("ERPCore.Domain.Entities.RunStageOutput", b =>
@@ -5970,8 +6278,7 @@ namespace ERPCore.Infra.Persistence.Migrations
                     b.HasOne("ERPCore.Domain.Entities.Uom", "Uom")
                         .WithMany()
                         .HasForeignKey("UomId")
-                        .OnDelete(DeleteBehavior.Restrict)
-                        .IsRequired();
+                        .OnDelete(DeleteBehavior.Restrict);
 
                     b.Navigation("Item");
 
@@ -6021,12 +6328,6 @@ namespace ERPCore.Infra.Persistence.Migrations
                         .OnDelete(DeleteBehavior.Cascade)
                         .IsRequired();
 
-                    b.HasOne("ERPCore.Domain.Entities.Uom", "Uom")
-                        .WithMany()
-                        .HasForeignKey("UomId")
-                        .OnDelete(DeleteBehavior.Restrict)
-                        .IsRequired();
-
                     b.HasOne("ERPCore.Domain.Entities.Warehouse", "Warehouse")
                         .WithMany()
                         .HasForeignKey("WarehouseId")
@@ -6037,8 +6338,6 @@ namespace ERPCore.Infra.Persistence.Migrations
 
                     b.Navigation("SalesInvoice");
 
-                    b.Navigation("Uom");
-
                     b.Navigation("Warehouse");
                 });
 
@@ -6083,12 +6382,6 @@ namespace ERPCore.Infra.Persistence.Migrations
                         .OnDelete(DeleteBehavior.Cascade)
                         .IsRequired();
 
-                    b.HasOne("ERPCore.Domain.Entities.Uom", "Uom")
-                        .WithMany()
-                        .HasForeignKey("UomId")
-                        .OnDelete(DeleteBehavior.Restrict)
-                        .IsRequired();
-
                     b.HasOne("ERPCore.Domain.Entities.Warehouse", "Warehouse")
                         .WithMany()
                         .HasForeignKey("WarehouseId")
@@ -6099,8 +6392,6 @@ namespace ERPCore.Infra.Persistence.Migrations
 
                     b.Navigation("SalesSlip");
 
-                    b.Navigation("Uom");
-
                     b.Navigation("Warehouse");
                 });
 
@@ -6160,19 +6451,11 @@ namespace ERPCore.Infra.Persistence.Migrations
                         .OnDelete(DeleteBehavior.Cascade)
                         .IsRequired();
 
-                    b.HasOne("ERPCore.Domain.Entities.Uom", "Uom")
-                        .WithMany()
-                        .HasForeignKey("UomId")
-                        .OnDelete(DeleteBehavior.Restrict)
-                        .IsRequired();
-
                     b.Navigation("FromOutput");
 
                     b.Navigation("Item");
 
                     b.Navigation("Stage");
-
-                    b.Navigation("Uom");
                 });
 
             modelBuilder.Entity("ERPCore.Domain.Entities.StageOutput", b =>
@@ -6191,8 +6474,7 @@ namespace ERPCore.Infra.Persistence.Migrations
                     b.HasOne("ERPCore.Domain.Entities.Uom", "Uom")
                         .WithMany()
                         .HasForeignKey("UomId")
-                        .OnDelete(DeleteBehavior.Restrict)
-                        .IsRequired();
+                        .OnDelete(DeleteBehavior.Restrict);
 
                     b.Navigation("Item");
 
@@ -6480,33 +6762,6 @@ namespace ERPCore.Infra.Persistence.Migrations
                     b.Navigation("Template");
                 });
 
-            modelBuilder.Entity("ERPCore.Domain.Entities.UomConversion", b =>
-                {
-                    b.HasOne("ERPCore.Domain.Entities.Uom", "FromUom")
-                        .WithMany()
-                        .HasForeignKey("FromUomId")
-                        .OnDelete(DeleteBehavior.Restrict)
-                        .IsRequired();
-
-                    b.HasOne("ERPCore.Domain.Entities.Item", "Item")
-                        .WithMany("UomConversions")
-                        .HasForeignKey("ItemId")
-                        .OnDelete(DeleteBehavior.Cascade)
-                        .IsRequired();
-
-                    b.HasOne("ERPCore.Domain.Entities.Uom", "ToUom")
-                        .WithMany()
-                        .HasForeignKey("ToUomId")
-                        .OnDelete(DeleteBehavior.Restrict)
-                        .IsRequired();
-
-                    b.Navigation("FromUom");
-
-                    b.Navigation("Item");
-
-                    b.Navigation("ToUom");
-                });
-
             modelBuilder.Entity("ERPCore.Domain.Entities.User", b =>
                 {
                     b.HasOne("ERPCore.Domain.Entities.Role", "Role")
@@ -6555,6 +6810,16 @@ namespace ERPCore.Infra.Persistence.Migrations
                     b.Navigation("Quotation");
                 });
 
+            modelBuilder.Entity("ERPCore.Domain.Entities.BundleSale", b =>
+                {
+                    b.Navigation("Lines");
+                });
+
+            modelBuilder.Entity("ERPCore.Domain.Entities.BundleSaleTemplate", b =>
+                {
+                    b.Navigation("Lines");
+                });
+
             modelBuilder.Entity("ERPCore.Domain.Entities.Category", b =>
                 {
                     b.Navigation("SubCategories");
@@ -6578,8 +6843,6 @@ namespace ERPCore.Infra.Persistence.Migrations
             modelBuilder.Entity("ERPCore.Domain.Entities.Item", b =>
                 {
                     b.Navigation("ReorderSettings");
-
-                    b.Navigation("UomConversions");
                 });
 
             modelBuilder.Entity("ERPCore.Domain.Entities.NavItem", b =>

Backend/ERPCore/Migrations/20260811095944_AddItemTypeIsMeasurable.cs

@@ -0,0 +1,29 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace ERPCore.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddItemTypeIsMeasurable : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<bool>(
+                name: "IsMeasurable",
+                table: "item_types",
+                type: "boolean",
+                nullable: false,
+                defaultValue: false);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "IsMeasurable",
+                table: "item_types");
+        }
+    }
+}

Backend/ERPCore/Migrations/20260812091117_AddGrnGlPostingAndPayments.cs

@@ -0,0 +1,113 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+
+#nullable disable
+
+namespace ERPCore.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddGrnGlPostingAndPayments : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<decimal>(
+                name: "BalanceAmount",
+                table: "grns",
+                type: "numeric(18,4)",
+                precision: 18,
+                scale: 4,
+                nullable: false,
+                defaultValue: 0m);
+
+            migrationBuilder.AddColumn<string>(
+                name: "GlJournalNo",
+                table: "grns",
+                type: "character varying(30)",
+                maxLength: 30,
+                nullable: true);
+
+            migrationBuilder.AddColumn<DateTime>(
+                name: "GlPostedAt",
+                table: "grns",
+                type: "timestamp with time zone",
+                nullable: true);
+
+            migrationBuilder.AddColumn<decimal>(
+                name: "PaidAmount",
+                table: "grns",
+                type: "numeric(18,4)",
+                precision: 18,
+                scale: 4,
+                nullable: false,
+                defaultValue: 0m);
+
+            migrationBuilder.CreateTable(
+                name: "grn_payments",
+                columns: table => new
+                {
+                    GrnPaymentId = table.Column<int>(type: "integer", nullable: false)
+                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
+                    GrnId = table.Column<int>(type: "integer", nullable: false),
+                    Amount = table.Column<decimal>(type: "numeric(18,4)", precision: 18, scale: 4, nullable: false),
+                    PaymentDate = table.Column<DateTime>(type: "timestamp with time zone", nullable: false),
+                    GlBankAccountId = table.Column<long>(type: "bigint", nullable: false),
+                    BankAccountName = table.Column<string>(type: "character varying(200)", maxLength: 200, nullable: false),
+                    Reference = table.Column<string>(type: "character varying(100)", maxLength: 100, nullable: true),
+                    GlJournalNo = table.Column<string>(type: "character varying(30)", maxLength: 30, nullable: true),
+                    CreatedBy = table.Column<int>(type: "integer", nullable: false),
+                    CreatedAt = table.Column<DateTime>(type: "timestamp with time zone", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_grn_payments", x => x.GrnPaymentId);
+                    table.ForeignKey(
+                        name: "FK_grn_payments_grns_GrnId",
+                        column: x => x.GrnId,
+                        principalTable: "grns",
+                        principalColumn: "GrnId",
+                        onDelete: ReferentialAction.Restrict);
+                    table.ForeignKey(
+                        name: "FK_grn_payments_users_CreatedBy",
+                        column: x => x.CreatedBy,
+                        principalTable: "users",
+                        principalColumn: "UserId",
+                        onDelete: ReferentialAction.Restrict);
+                });
+
+            migrationBuilder.CreateIndex(
+                name: "IX_grn_payments_CreatedBy",
+                table: "grn_payments",
+                column: "CreatedBy");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_grn_payments_GrnId",
+                table: "grn_payments",
+                column: "GrnId");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "grn_payments");
+
+            migrationBuilder.DropColumn(
+                name: "BalanceAmount",
+                table: "grns");
+
+            migrationBuilder.DropColumn(
+                name: "GlJournalNo",
+                table: "grns");
+
+            migrationBuilder.DropColumn(
+                name: "GlPostedAt",
+                table: "grns");
+
+            migrationBuilder.DropColumn(
+                name: "PaidAmount",
+                table: "grns");
+        }
+    }
+}

Backend/ERPCore/Migrations/20260813091828_warrenty.cs

@@ -0,0 +1,196 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+
+#nullable disable
+
+namespace ERPCore.Migrations
+{
+    /// <inheritdoc />
+    public partial class warrenty : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<string>(
+                name: "Warranty",
+                table: "items",
+                type: "character varying(20)",
+                maxLength: 20,
+                nullable: false,
+                defaultValue: "NonWarranty");
+
+            migrationBuilder.AddColumn<int>(
+                name: "WarrantyPeriodMonths",
+                table: "items",
+                type: "integer",
+                nullable: true);
+
+            migrationBuilder.CreateTable(
+                name: "grn_line_warranty_numbers",
+                columns: table => new
+                {
+                    GrnLineWarrantyNumberId = table.Column<int>(type: "integer", nullable: false)
+                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
+                    GrnLineId = table.Column<int>(type: "integer", nullable: false),
+                    WarrantyNo = table.Column<string>(type: "character varying(100)", maxLength: 100, nullable: false),
+                    WarrantyPeriodMonths = table.Column<int>(type: "integer", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_grn_line_warranty_numbers", x => x.GrnLineWarrantyNumberId);
+                    table.ForeignKey(
+                        name: "FK_grn_line_warranty_numbers_grn_lines_GrnLineId",
+                        column: x => x.GrnLineId,
+                        principalTable: "grn_lines",
+                        principalColumn: "GrnLineId",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "sales_returns",
+                columns: table => new
+                {
+                    ReturnId = table.Column<int>(type: "integer", nullable: false)
+                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
+                    DocNo = table.Column<string>(type: "character varying(30)", maxLength: 30, nullable: false),
+                    CustomerId = table.Column<int>(type: "integer", nullable: false),
+                    WarehouseId = table.Column<int>(type: "integer", nullable: false),
+                    ReasonCodeId = table.Column<int>(type: "integer", nullable: false),
+                    Status = table.Column<string>(type: "character varying(20)", maxLength: 20, nullable: false),
+                    CreatedBy = table.Column<int>(type: "integer", nullable: false),
+                    CreatedAt = table.Column<DateTime>(type: "timestamp with time zone", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_sales_returns", x => x.ReturnId);
+                    table.ForeignKey(
+                        name: "FK_sales_returns_customers_CustomerId",
+                        column: x => x.CustomerId,
+                        principalTable: "customers",
+                        principalColumn: "CustomerId",
+                        onDelete: ReferentialAction.Restrict);
+                    table.ForeignKey(
+                        name: "FK_sales_returns_reason_codes_ReasonCodeId",
+                        column: x => x.ReasonCodeId,
+                        principalTable: "reason_codes",
+                        principalColumn: "ReasonCodeId",
+                        onDelete: ReferentialAction.Restrict);
+                    table.ForeignKey(
+                        name: "FK_sales_returns_users_CreatedBy",
+                        column: x => x.CreatedBy,
+                        principalTable: "users",
+                        principalColumn: "UserId",
+                        onDelete: ReferentialAction.Restrict);
+                    table.ForeignKey(
+                        name: "FK_sales_returns_warehouses_WarehouseId",
+                        column: x => x.WarehouseId,
+                        principalTable: "warehouses",
+                        principalColumn: "WarehouseId",
+                        onDelete: ReferentialAction.Restrict);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "sales_return_lines",
+                columns: table => new
+                {
+                    ReturnLineId = table.Column<int>(type: "integer", nullable: false)
+                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
+                    ReturnId = table.Column<int>(type: "integer", nullable: false),
+                    SalesInvoiceLineId = table.Column<int>(type: "integer", nullable: true),
+                    ItemId = table.Column<int>(type: "integer", nullable: false),
+                    Qty = table.Column<decimal>(type: "numeric(18,4)", precision: 18, scale: 4, nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_sales_return_lines", x => x.ReturnLineId);
+                    table.ForeignKey(
+                        name: "FK_sales_return_lines_items_ItemId",
+                        column: x => x.ItemId,
+                        principalTable: "items",
+                        principalColumn: "ItemId",
+                        onDelete: ReferentialAction.Restrict);
+                    table.ForeignKey(
+                        name: "FK_sales_return_lines_sales_invoice_lines_SalesInvoiceLineId",
+                        column: x => x.SalesInvoiceLineId,
+                        principalTable: "sales_invoice_lines",
+                        principalColumn: "SalesInvoiceLineId",
+                        onDelete: ReferentialAction.Restrict);
+                    table.ForeignKey(
+                        name: "FK_sales_return_lines_sales_returns_ReturnId",
+                        column: x => x.ReturnId,
+                        principalTable: "sales_returns",
+                        principalColumn: "ReturnId",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
+            migrationBuilder.CreateIndex(
+                name: "IX_grn_line_warranty_numbers_GrnLineId_WarrantyNo",
+                table: "grn_line_warranty_numbers",
+                columns: new[] { "GrnLineId", "WarrantyNo" },
+                unique: true);
+
+            migrationBuilder.CreateIndex(
+                name: "IX_sales_return_lines_ItemId",
+                table: "sales_return_lines",
+                column: "ItemId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_sales_return_lines_ReturnId",
+                table: "sales_return_lines",
+                column: "ReturnId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_sales_return_lines_SalesInvoiceLineId",
+                table: "sales_return_lines",
+                column: "SalesInvoiceLineId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_sales_returns_CreatedBy",
+                table: "sales_returns",
+                column: "CreatedBy");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_sales_returns_CustomerId",
+                table: "sales_returns",
+                column: "CustomerId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_sales_returns_DocNo",
+                table: "sales_returns",
+                column: "DocNo",
+                unique: true);
+
+            migrationBuilder.CreateIndex(
+                name: "IX_sales_returns_ReasonCodeId",
+                table: "sales_returns",
+                column: "ReasonCodeId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_sales_returns_WarehouseId",
+                table: "sales_returns",
+                column: "WarehouseId");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "grn_line_warranty_numbers");
+
+            migrationBuilder.DropTable(
+                name: "sales_return_lines");
+
+            migrationBuilder.DropTable(
+                name: "sales_returns");
+
+            migrationBuilder.DropColumn(
+                name: "Warranty",
+                table: "items");
+
+            migrationBuilder.DropColumn(
+                name: "WarrantyPeriodMonths",
+                table: "items");
+        }
+    }
+}

Backend/ERPCore/Migrations/20260816130723_AddSalesDayEnd.cs

@@ -0,0 +1,109 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+
+#nullable disable
+
+namespace ERPCore.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddSalesDayEnd : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<int>(
+                name: "DayEndId",
+                table: "sales_slips",
+                type: "integer",
+                nullable: true);
+
+            migrationBuilder.CreateTable(
+                name: "sales_day_ends",
+                columns: table => new
+                {
+                    SalesDayEndId = table.Column<int>(type: "integer", nullable: false)
+                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
+                    DocNo = table.Column<string>(type: "character varying(30)", maxLength: 30, nullable: false),
+                    CashierUserId = table.Column<int>(type: "integer", nullable: false),
+                    BusinessDate = table.Column<DateOnly>(type: "date", nullable: false),
+                    SlipCount = table.Column<int>(type: "integer", nullable: false),
+                    Subtotal = table.Column<decimal>(type: "numeric(18,4)", precision: 18, scale: 4, nullable: false),
+                    DiscountTotal = table.Column<decimal>(type: "numeric(18,4)", precision: 18, scale: 4, nullable: false),
+                    TaxTotal = table.Column<decimal>(type: "numeric(18,4)", precision: 18, scale: 4, nullable: false),
+                    GrandTotal = table.Column<decimal>(type: "numeric(18,4)", precision: 18, scale: 4, nullable: false),
+                    CostOfGoodsSold = table.Column<decimal>(type: "numeric(18,4)", precision: 18, scale: 4, nullable: false),
+                    GlJournalNo = table.Column<string>(type: "character varying(30)", maxLength: 30, nullable: true),
+                    GlPostedAt = table.Column<DateTime>(type: "timestamp with time zone", nullable: true),
+                    ClosedBy = table.Column<int>(type: "integer", nullable: false),
+                    ClosedAt = table.Column<DateTime>(type: "timestamp with time zone", nullable: false),
+                    xmin = table.Column<uint>(type: "xid", rowVersion: true, nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_sales_day_ends", x => x.SalesDayEndId);
+                    table.ForeignKey(
+                        name: "FK_sales_day_ends_users_CashierUserId",
+                        column: x => x.CashierUserId,
+                        principalTable: "users",
+                        principalColumn: "UserId",
+                        onDelete: ReferentialAction.Restrict);
+                    table.ForeignKey(
+                        name: "FK_sales_day_ends_users_ClosedBy",
+                        column: x => x.ClosedBy,
+                        principalTable: "users",
+                        principalColumn: "UserId",
+                        onDelete: ReferentialAction.Restrict);
+                });
+
+            migrationBuilder.CreateIndex(
+                name: "IX_sales_slips_DayEndId",
+                table: "sales_slips",
+                column: "DayEndId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_sales_day_ends_CashierUserId_BusinessDate",
+                table: "sales_day_ends",
+                columns: new[] { "CashierUserId", "BusinessDate" },
+                unique: true);
+
+            migrationBuilder.CreateIndex(
+                name: "IX_sales_day_ends_ClosedBy",
+                table: "sales_day_ends",
+                column: "ClosedBy");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_sales_day_ends_DocNo",
+                table: "sales_day_ends",
+                column: "DocNo",
+                unique: true);
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_sales_slips_sales_day_ends_DayEndId",
+                table: "sales_slips",
+                column: "DayEndId",
+                principalTable: "sales_day_ends",
+                principalColumn: "SalesDayEndId",
+                onDelete: ReferentialAction.Restrict);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropForeignKey(
+                name: "FK_sales_slips_sales_day_ends_DayEndId",
+                table: "sales_slips");
+
+            migrationBuilder.DropTable(
+                name: "sales_day_ends");
+
+            migrationBuilder.DropIndex(
+                name: "IX_sales_slips_DayEndId",
+                table: "sales_slips");
+
+            migrationBuilder.DropColumn(
+                name: "DayEndId",
+                table: "sales_slips");
+        }
+    }
+}

Backend/ERPCore/Migrations/20260816133305_AddReturnGlPosting.cs

@@ -0,0 +1,61 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace ERPCore.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddReturnGlPosting : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<string>(
+                name: "GlJournalNo",
+                table: "sales_returns",
+                type: "character varying(30)",
+                maxLength: 30,
+                nullable: true);
+
+            migrationBuilder.AddColumn<DateTime>(
+                name: "GlPostedAt",
+                table: "sales_returns",
+                type: "timestamp with time zone",
+                nullable: true);
+
+            migrationBuilder.AddColumn<string>(
+                name: "GlJournalNo",
+                table: "purchase_returns",
+                type: "character varying(30)",
+                maxLength: 30,
+                nullable: true);
+
+            migrationBuilder.AddColumn<DateTime>(
+                name: "GlPostedAt",
+                table: "purchase_returns",
+                type: "timestamp with time zone",
+                nullable: true);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "GlJournalNo",
+                table: "sales_returns");
+
+            migrationBuilder.DropColumn(
+                name: "GlPostedAt",
+                table: "sales_returns");
+
+            migrationBuilder.DropColumn(
+                name: "GlJournalNo",
+                table: "purchase_returns");
+
+            migrationBuilder.DropColumn(
+                name: "GlPostedAt",
+                table: "purchase_returns");
+        }
+    }
+}

Backend/ERPCore/Migrations/20260816142234_AddAdjustmentGlPosting.cs

@@ -0,0 +1,40 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace ERPCore.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddAdjustmentGlPosting : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<string>(
+                name: "GlJournalNo",
+                table: "stock_adjustments",
+                type: "character varying(30)",
+                maxLength: 30,
+                nullable: true);
+
+            migrationBuilder.AddColumn<DateTime>(
+                name: "GlPostedAt",
+                table: "stock_adjustments",
+                type: "timestamp with time zone",
+                nullable: true);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "GlJournalNo",
+                table: "stock_adjustments");
+
+            migrationBuilder.DropColumn(
+                name: "GlPostedAt",
+                table: "stock_adjustments");
+        }
+    }
+}

Backend/ERPCore/Migrations/20260816151344_AddBundleSaleToDayEnd.cs

@@ -0,0 +1,60 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace ERPCore.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddBundleSaleToDayEnd : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<int>(
+                name: "BundleCount",
+                table: "sales_day_ends",
+                type: "integer",
+                nullable: false,
+                defaultValue: 0);
+
+            migrationBuilder.AddColumn<int>(
+                name: "DayEndId",
+                table: "bundle_sales",
+                type: "integer",
+                nullable: true);
+
+            migrationBuilder.CreateIndex(
+                name: "IX_bundle_sales_DayEndId",
+                table: "bundle_sales",
+                column: "DayEndId");
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_bundle_sales_sales_day_ends_DayEndId",
+                table: "bundle_sales",
+                column: "DayEndId",
+                principalTable: "sales_day_ends",
+                principalColumn: "SalesDayEndId",
+                onDelete: ReferentialAction.Restrict);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropForeignKey(
+                name: "FK_bundle_sales_sales_day_ends_DayEndId",
+                table: "bundle_sales");
+
+            migrationBuilder.DropIndex(
+                name: "IX_bundle_sales_DayEndId",
+                table: "bundle_sales");
+
+            migrationBuilder.DropColumn(
+                name: "BundleCount",
+                table: "sales_day_ends");
+
+            migrationBuilder.DropColumn(
+                name: "DayEndId",
+                table: "bundle_sales");
+        }
+    }
+}

Backend/ERPCore/Migrations/20260816174034_AddSalesInvoicePayments.cs

@@ -0,0 +1,87 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+
+#nullable disable
+
+namespace ERPCore.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddSalesInvoicePayments : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<string>(
+                name: "GlJournalNo",
+                table: "sales_invoices",
+                type: "character varying(30)",
+                maxLength: 30,
+                nullable: true);
+
+            migrationBuilder.AddColumn<DateTime>(
+                name: "GlPostedAt",
+                table: "sales_invoices",
+                type: "timestamp with time zone",
+                nullable: true);
+
+            migrationBuilder.CreateTable(
+                name: "sales_invoice_payments",
+                columns: table => new
+                {
+                    SalesInvoicePaymentId = table.Column<int>(type: "integer", nullable: false)
+                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
+                    SalesInvoiceId = table.Column<int>(type: "integer", nullable: false),
+                    Amount = table.Column<decimal>(type: "numeric(18,4)", precision: 18, scale: 4, nullable: false),
+                    PaymentDate = table.Column<DateTime>(type: "timestamp with time zone", nullable: false),
+                    GlBankAccountId = table.Column<long>(type: "bigint", nullable: false),
+                    BankAccountName = table.Column<string>(type: "character varying(200)", maxLength: 200, nullable: false),
+                    Reference = table.Column<string>(type: "character varying(100)", maxLength: 100, nullable: true),
+                    GlJournalNo = table.Column<string>(type: "character varying(30)", maxLength: 30, nullable: true),
+                    CreatedBy = table.Column<int>(type: "integer", nullable: false),
+                    CreatedAt = table.Column<DateTime>(type: "timestamp with time zone", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_sales_invoice_payments", x => x.SalesInvoicePaymentId);
+                    table.ForeignKey(
+                        name: "FK_sales_invoice_payments_sales_invoices_SalesInvoiceId",
+                        column: x => x.SalesInvoiceId,
+                        principalTable: "sales_invoices",
+                        principalColumn: "SalesInvoiceId",
+                        onDelete: ReferentialAction.Restrict);
+                    table.ForeignKey(
+                        name: "FK_sales_invoice_payments_users_CreatedBy",
+                        column: x => x.CreatedBy,
+                        principalTable: "users",
+                        principalColumn: "UserId",
+                        onDelete: ReferentialAction.Restrict);
+                });
+
+            migrationBuilder.CreateIndex(
+                name: "IX_sales_invoice_payments_CreatedBy",
+                table: "sales_invoice_payments",
+                column: "CreatedBy");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_sales_invoice_payments_SalesInvoiceId",
+                table: "sales_invoice_payments",
+                column: "SalesInvoiceId");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "sales_invoice_payments");
+
+            migrationBuilder.DropColumn(
+                name: "GlJournalNo",
+                table: "sales_invoices");
+
+            migrationBuilder.DropColumn(
+                name: "GlPostedAt",
+                table: "sales_invoices");
+        }
+    }
+}

Backend/ERPCore/Program.cs

@@ -16,7 +16,9 @@ using ERPCore.Services.Stock;
 using ERPCore.System.Errors;
 using Microsoft.AspNetCore.Authentication;
 using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Diagnostics;
 using Microsoft.OpenApi;
+using Npgsql;
 using Serilog;
 
 var builder = WebApplication.CreateBuilder(args);
@@ -32,7 +34,10 @@ builder.Services.AddControllers()
 
 // EF Core + PostgreSQL
 builder.Services.AddDbContext<ErpDbContext>(o =>
-    o.UseNpgsql(builder.Configuration.GetConnectionString("DefaultConnection")));
+{
+    o.UseNpgsql(builder.Configuration.GetConnectionString("DefaultConnection"));
+    o.ConfigureWarnings(w => w.Ignore(RelationalEventId.PendingModelChangesWarning));
+});
 
 // ProblemDetails (RFC 7807) + domain-exception mapping
 builder.Services.AddProblemDetails();
@@ -78,7 +83,7 @@ builder.Services.AddScoped<IUomService, UomService>();
 builder.Services.AddScoped<ICategoryService, CategoryService>();
 builder.Services.AddScoped<IBrandService, BrandService>();
 builder.Services.AddScoped<IItemTypeService, ItemTypeService>();
-builder.Services.AddScoped<ICompanyProfileService, CompanyProfileService>();
+//builder.Services.AddScoped<ICompanyProfileService, CompanyProfileService>();
 builder.Services.AddScoped<IProductConfigService, ProductConfigService>();
 builder.Services.AddScoped<IVendorService, VendorService>();
 builder.Services.AddScoped<IWarehouseService, WarehouseService>();
@@ -94,17 +99,26 @@ builder.Services.AddScoped<IRfqService, RfqService>();
 builder.Services.AddScoped<IPurchaseOrderService, PurchaseOrderService>();
 
 // Stock core + goods receipt (docs/11 §4–5)
-builder.Services.AddScoped<IUomConverter, UomConverter>();
+builder.Services.AddScoped<IItemMeasure, ItemMeasure>();
 builder.Services.AddScoped<IFifoCostingService, FifoCostingService>();
 builder.Services.AddScoped<IStockService, StockService>();
 builder.Services.AddScoped<IGrnService, GrnService>();
+builder.Services.AddScoped<IGrnPaymentService, GrnPaymentService>();
 
 // Sales (Phase 1)
 builder.Services.AddScoped<ISalesPricingService, SalesPricingService>();
+builder.Services.AddScoped<ISalesDomainService, SalesDomainService>();
+builder.Services.AddScoped<ISalesPostingService, SalesPostingService>();
+builder.Services.AddScoped<ISalesDocumentWorkflowService, SalesDocumentWorkflowService>();
+builder.Services.AddScoped<ISalesMappingService, SalesMappingService>();
 builder.Services.AddScoped<ISalesInvoiceService, SalesInvoiceService>();
+builder.Services.AddScoped<ISalesInvoicePaymentService, SalesInvoicePaymentService>();
 builder.Services.AddScoped<ISalesSlipService, SalesSlipService>();
+builder.Services.AddScoped<IBundleSaleService, BundleSaleService>();
 builder.Services.AddScoped<ISalesPromotionSuggestionService, SalesPromotionSuggestionService>();
 builder.Services.AddScoped<ISalesReportService, SalesReportService>();
+builder.Services.AddScoped<ISalesReturnService, SalesReturnService>();
+builder.Services.AddScoped<ISalesDayEndService, SalesDayEndService>();
 
 // Stock transactions + reference data (docs/11 §5–6)
 builder.Services.AddScoped<IStockMutator, StockMutator>();
@@ -180,6 +194,7 @@ var app = builder.Build();
 using (var scope = app.Services.CreateScope())
 {
     var db = scope.ServiceProvider.GetRequiredService<ErpDbContext>();
+   // await EnsureMigrationBaselineAsync(db);
     await db.Database.MigrateAsync();
     try
     {
@@ -205,3 +220,4 @@ app.UseAuthorization();
 app.MapControllers();
 app.MapHealthChecks("/health");
 app.Run();
+

Backend/ERPCore/Services/AdjustmentService.cs

@@ -6,6 +6,7 @@ using ERPCore.Dtos.Stock;
 using ERPCore.Infra.Auth;
 using ERPCore.Infra.UoW;
 using ERPCore.Repositories.Interfaces;
+using ERPCore.Services.Gl;
 using ERPCore.Services.Interfaces;
 using ERPCore.System.Errors;
 using Microsoft.EntityFrameworkCore;
@@ -16,7 +17,10 @@ namespace ERPCore.Services;
 /// Stock-adjustment service — the highest-risk feature (02-SECURITY C.5). Auto-posts
 /// with a mandatory reason code and user stamp. Line application (FIFO consume on a
 /// decrease, layer create on an increase) + ledger posting is delegated to
-/// <see cref="IStockMutator"/>. Runs in a single UoW transaction (NFR-02/05).
+/// <see cref="IStockMutator"/>. Runs in a single UoW transaction (NFR-02/05). Also posts
+/// a real GL journal entry — increases and decreases post as separate Inventory/Gain and
+/// Loss/Inventory lines respectively (never netted against each other), so a count that's
+/// simultaneously over on one item and under on another shows both, not a false net.
 /// </summary>
 public sealed class AdjustmentService : IAdjustmentService
 {
@@ -29,11 +33,16 @@ public sealed class AdjustmentService : IAdjustmentService
     private readonly INumberSequenceService _numbers;
     private readonly ICurrentUser _currentUser;
     private readonly IUnitOfWork _uow;
+    private readonly IGeneralLedgerService _gl;
+    private readonly string _glInventoryAccountCode;
+    private readonly string _glGainAccountCode;
+    private readonly string _glLossAccountCode;
 
     public AdjustmentService(
         IRepository<StockAdjustment> adjustments, IRepository<Warehouse> warehouses, IRepository<Item> items,
         IRepository<ReasonCode> reasonCodes, IRepository<StockLedger> ledger, IStockMutator mutator,
-        INumberSequenceService numbers, ICurrentUser currentUser, IUnitOfWork uow)
+        INumberSequenceService numbers, ICurrentUser currentUser, IUnitOfWork uow,
+        IGeneralLedgerService gl, IConfiguration configuration)
     {
         _adjustments = adjustments;
         _warehouses = warehouses;
@@ -44,6 +53,45 @@ public sealed class AdjustmentService : IAdjustmentService
         _numbers = numbers;
         _currentUser = currentUser;
         _uow = uow;
+        _gl = gl;
+        _glInventoryAccountCode = configuration["Adjustment:GlInventoryAccountCode"] ?? string.Empty;
+        _glGainAccountCode = configuration["Adjustment:GlGainAccountCode"] ?? string.Empty;
+        _glLossAccountCode = configuration["Adjustment:GlLossAccountCode"] ?? string.Empty;
+    }
+
+    /// <summary>Builds and posts the GL journal for a <see cref="StockAdjustment"/>'s stock movement.
+    /// <see cref="CountService"/>'s variance posting mirrors this exact logic for the same reason
+    /// (it creates a <see cref="StockAdjustment"/> through the same <see cref="IStockMutator"/> call).</summary>
+    private async Task<string?> PostAdjustmentJournalAsync(
+        string docNo, DateTime now, IReadOnlyList<StockLedger> refs, CancellationToken ct)
+    {
+        var gain = refs.Where(r => r.Direction == Direction.In).Sum(r => r.Value);
+        var loss = refs.Where(r => r.Direction == Direction.Out).Sum(r => r.Value);
+        if (gain <= 0 && loss <= 0) return null;
+
+        var period = await _gl.GetPeriodByDateAsync(DateOnly.FromDateTime(now), ct);
+        var lines = new List<GlJournalEntryLineRequest>();
+        if (gain > 0)
+        {
+            lines.Add(new GlJournalEntryLineRequest(_glInventoryAccountCode, gain, 0m, $"Adjustment {docNo} — stock increase"));
+            lines.Add(new GlJournalEntryLineRequest(_glGainAccountCode, 0m, gain, $"Adjustment {docNo} — inventory gain"));
+        }
+        if (loss > 0)
+        {
+            lines.Add(new GlJournalEntryLineRequest(_glLossAccountCode, loss, 0m, $"Adjustment {docNo} — inventory loss"));
+            lines.Add(new GlJournalEntryLineRequest(_glInventoryAccountCode, 0m, loss, $"Adjustment {docNo} — stock decrease"));
+        }
+
+        var result = await _gl.PostJournalEntryAsync(new GlJournalEntryRequest
+        {
+            PeriodId = period.PeriodId,
+            EntryDate = DateOnly.FromDateTime(now),
+            SourceModule = "ADJUSTMENT",
+            Reference = docNo,
+            Narration = $"Stock adjustment {docNo}",
+            Lines = lines
+        }, ct);
+        return result.JournalNo;
     }
 
     public async Task<PagedResponse<AdjustmentSummaryDto>> ListAsync(
@@ -64,7 +112,7 @@ public sealed class AdjustmentService : IAdjustmentService
             .Skip(query.Skip).Take(query.PageSize)
             .Select(a => new AdjustmentSummaryDto(
                 a.AdjustmentId, a.DocNo, a.WarehouseId, a.ReasonCodeId, a.Status,
-                a.CreatedBy, a.CreatedAt, a.Lines.Count))
+                a.CreatedBy, a.CreatedAt, a.Lines.Count, a.GlJournalNo))
             .ToListAsync(ct);
 
         return PagedResponse<AdjustmentSummaryDto>.Create(rows, query.Page, query.PageSize, total);
@@ -136,6 +184,10 @@ public sealed class AdjustmentService : IAdjustmentService
             await _uow.SaveChangesAsync(token); // flush so AdjustmentId is a valid ledger sourceDocId
 
             var refs = await _mutator.ApplyAsync(request.WarehouseId, DocumentTypes.Adjustment, entity.AdjustmentId, now, deltas, token);
+
+            entity.GlJournalNo = await PostAdjustmentJournalAsync(docNo, now, refs, token);
+            if (entity.GlJournalNo is not null) entity.GlPostedAt = now;
+
             return (entity, refs);
         }, ct);
 
@@ -144,6 +196,7 @@ public sealed class AdjustmentService : IAdjustmentService
 
     private static AdjustmentDto ToDto(StockAdjustment a, IReadOnlyList<int> ledgerRefs) => new(
         a.AdjustmentId, a.DocNo, a.WarehouseId, a.ReasonCodeId, a.Status, a.CreatedBy, a.CreatedAt,
+        a.GlJournalNo, a.GlPostedAt,
         a.Lines.OrderBy(l => l.AdjLineId)
             .Select(l => new AdjustmentLineDto(l.AdjLineId, l.ItemId, l.BinId, l.BatchId, l.QtyDelta)).ToList(),
         ledgerRefs);

Backend/ERPCore/Services/BundleSaleService.cs

@@ -0,0 +1,259 @@
+using ERPCore.Domain;
+using ERPCore.Domain.Entities;
+using ERPCore.Domain.Enums;
+using ERPCore.Dtos.Common;
+using ERPCore.Dtos.Sales;
+using ERPCore.Infra.Auth;
+using ERPCore.Infra.UoW;
+using ERPCore.Repositories.Interfaces;
+using ERPCore.Services.Interfaces;
+using ERPCore.Services.Stock;
+using ERPCore.System.Errors;
+using Microsoft.EntityFrameworkCore;
+
+namespace ERPCore.Services;
+
+public sealed class BundleSaleService : IBundleSaleService
+{
+    private readonly IRepository<BundleSaleTemplate> _templates;
+    private readonly IRepository<BundleSale> _bundles;
+    private readonly IRepository<SalesDayEnd> _dayEnds;
+    private readonly IRepository<Customer> _customers;
+    private readonly IRepository<Item> _items;
+    private readonly IRepository<Warehouse> _warehouses;
+    private readonly IRepository<User> _users;
+    private readonly ISalesDomainService _sales;
+    private readonly ISalesPostingService _posting;
+    private readonly ICurrentUser _currentUser;
+    private readonly INumberSequenceService _numbers;
+    private readonly IUnitOfWork _uow;
+
+    public BundleSaleService(
+        IRepository<BundleSale> bundles,
+        IRepository<BundleSaleTemplate> templates,
+        IRepository<SalesDayEnd> dayEnds,
+        IRepository<Customer> customers,
+        IRepository<Item> items,
+        IRepository<Warehouse> warehouses,
+        IRepository<User> users,
+        ISalesDomainService sales,
+        ISalesPostingService posting,
+        ICurrentUser currentUser,
+        INumberSequenceService numbers,
+        IUnitOfWork uow)
+    {
+        _templates = templates;
+        _bundles = bundles;
+        _dayEnds = dayEnds;
+        _customers = customers;
+        _items = items;
+        _warehouses = warehouses;
+        _users = users;
+        _sales = sales;
+        _posting = posting;
+        _currentUser = currentUser;
+        _numbers = numbers;
+        _uow = uow;
+    }
+
+    public async Task<PagedResponse<BundleSaleTemplateSummaryDto>> ListTemplatesAsync(PageQuery query, CancellationToken ct = default)
+    {
+        IQueryable<BundleSaleTemplate> q = _templates.Query().AsNoTracking().Include(x => x.Lines);
+        if (!string.IsNullOrWhiteSpace(query.Q))
+        {
+            var term = query.Q.Trim();
+            q = q.Where(x => EF.Functions.ILike(x.TemplateCode, $"%{term}%") || EF.Functions.ILike(x.TemplateName, $"%{term}%") || EF.Functions.ILike(x.Description ?? "", $"%{term}%"));
+        }
+        var total = await q.CountAsync(ct);
+        var rows = await q.OrderByDescending(x => x.BundleSaleTemplateId).Skip(query.Skip).Take(query.PageSize).ToListAsync(ct);
+        return PagedResponse<BundleSaleTemplateSummaryDto>.Create(rows.Select(x => new BundleSaleTemplateSummaryDto(
+            x.BundleSaleTemplateId, x.TemplateCode, x.TemplateName, x.Description, x.Status, x.Lines.Count, x.CreatedAt, x.UpdatedAt)).ToList(), query.Page, query.PageSize, total);
+    }
+
+    public async Task<BundleSaleTemplateDto?> GetTemplateAsync(int bundleSaleTemplateId, CancellationToken ct = default)
+    {
+        var template = await _templates.Query().AsNoTracking().Include(x => x.Lines).FirstOrDefaultAsync(x => x.BundleSaleTemplateId == bundleSaleTemplateId, ct);
+        return template is null ? null : new BundleSaleTemplateDto(
+            template.BundleSaleTemplateId,
+            template.TemplateCode,
+            template.TemplateName,
+            template.Description,
+            template.Status,
+            template.CreatedAt,
+            template.UpdatedAt,
+            template.Lines.OrderBy(x => x.SortOrder).Select(x => new BundleSaleTemplateLineDto(
+                x.BundleSaleTemplateLineId, x.ItemId, x.WarehouseId, x.Qty, x.UnitPrice, x.IncludeInBundle, x.SortOrder)).ToList());
+    }
+
+    public async Task<PagedResponse<BundleSaleSummaryDto>> ListAsync(PageQuery query, BundleSaleStatus? status, int? customerId, int? warehouseId, CancellationToken ct = default)
+    {
+        IQueryable<BundleSale> q = _bundles.Query().AsNoTracking().Include(x => x.Lines);
+        if (!string.IsNullOrWhiteSpace(query.Q))
+        {
+            var term = query.Q.Trim();
+            q = q.Where(x => EF.Functions.ILike(x.BundleNo, $"%{term}%") || EF.Functions.ILike(x.BundleName, $"%{term}%") || EF.Functions.ILike(x.BundleCode, $"%{term}%"));
+        }
+        if (status is not null) q = q.Where(x => x.Status == status);
+        if (customerId is not null) q = q.Where(x => x.CustomerId == customerId);
+        if (warehouseId is not null) q = q.Where(x => x.WarehouseId == warehouseId);
+        var total = await q.CountAsync(ct);
+        var rows = await q.OrderByDescending(x => x.BundleSaleId).Skip(query.Skip).Take(query.PageSize).ToListAsync(ct);
+        return PagedResponse<BundleSaleSummaryDto>.Create(rows.Select(MapSummary).ToList(), query.Page, query.PageSize, total);
+    }
+
+    public async Task<BundleSaleDto?> GetAsync(int bundleSaleId, CancellationToken ct = default)
+    {
+        var bundle = await _bundles.Query().AsNoTracking().Include(x => x.Lines).FirstOrDefaultAsync(x => x.BundleSaleId == bundleSaleId, ct);
+        return bundle is null ? null : Map(bundle);
+    }
+
+    public Task<BundleSalePostingCheckDto> CheckPostingAsync(int bundleSaleId, CancellationToken ct = default)
+        => _posting.CheckBundleAsync(bundleSaleId, ct);
+
+    public async Task<BundleSaleDto> CreateAsync(CreateBundleSaleRequest request, CancellationToken ct = default)
+    {
+        await _sales.ValidateSalesHeaderAsync(request.CustomerId, request.WarehouseId, request.CashierUserId, true, ct);
+
+        // Same guard as SalesSlipService.CreateAsync — a bundle sale is a cashier document
+        // exactly like a sales slip, so it's blocked by the same closed day (docs/14 Sales Day End).
+        var today = DateOnly.FromDateTime(DateTime.UtcNow);
+        var alreadyClosed = await _dayEnds.Query().AsNoTracking()
+            .AnyAsync(x => x.CashierUserId == request.CashierUserId && x.BusinessDate == today, ct);
+        if (alreadyClosed)
+            throw new ConflictException($"Cashier {request.CashierUserId} already closed today's ({today:yyyy-MM-dd}) sales — day-end has been posted.");
+
+        var template = await _templates.Query().AsNoTracking().Include(x => x.Lines)
+            .FirstAsync(x => x.BundleSaleTemplateId == request.BundleSaleTemplateId, ct);
+        var bundle = new BundleSale
+        {
+            BundleNo = await _numbers.NextAsync(DocumentTypes.BundleSale, ct),
+            BundleDate = DateTime.UtcNow,
+            CustomerId = request.CustomerId,
+            WarehouseId = request.WarehouseId,
+            CashierUserId = request.CashierUserId,
+            BundleSaleTemplateId = request.BundleSaleTemplateId,
+            BundleName = request.BundleName,
+            BundleCode = string.Empty,
+            Status = BundleSaleStatus.Draft,
+            CreatedAt = DateTime.UtcNow
+        };
+        bundle.CustomerSnapshotName = await _customers.Query().Where(x => x.CustomerId == request.CustomerId).Select(x => x.DisplayName ?? x.Name).FirstAsync(ct);
+        bundle.Lines = await BuildLinesAsync(template, request.WarehouseId, request.Lines, ct);
+        Recalculate(bundle, request.BundlePrice);
+        bundle.BundleCode = $"{bundle.BundleNo}-B";
+        await _bundles.AddAsync(bundle, ct);
+        bundle.ConcurrencyStamp = 1;
+        await _uow.SaveChangesAsync(ct);
+        return Map(bundle);
+    }
+
+    public async Task<BundleSaleDto> UpdateAsync(int bundleSaleId, UpdateBundleSaleRequest request, CancellationToken ct = default)
+    {
+        var bundle = await _bundles.Query().Include(x => x.Lines).FirstOrDefaultAsync(x => x.BundleSaleId == bundleSaleId, ct)
+            ?? throw new NotFoundException($"Bundle sale {bundleSaleId} was not found.");
+        if (bundle.Status != BundleSaleStatus.Draft)
+            throw new ConflictException($"Bundle sale {bundleSaleId} is {bundle.Status} and cannot be edited.");
+
+        await _sales.ValidateSalesHeaderAsync(request.CustomerId, request.WarehouseId, request.CashierUserId, true, ct);
+        var template = await _templates.Query().AsNoTracking().Include(x => x.Lines)
+            .FirstAsync(x => x.BundleSaleTemplateId == request.BundleSaleTemplateId, ct);
+        bundle.CustomerId = request.CustomerId;
+        bundle.WarehouseId = request.WarehouseId;
+        bundle.CashierUserId = request.CashierUserId;
+        bundle.BundleSaleTemplateId = request.BundleSaleTemplateId;
+        bundle.BundleName = request.BundleName;
+        bundle.CustomerSnapshotName = await _customers.Query().Where(x => x.CustomerId == request.CustomerId).Select(x => x.DisplayName ?? x.Name).FirstAsync(ct);
+        bundle.Lines.Clear();
+        foreach (var line in await BuildLinesAsync(template, request.WarehouseId, request.Lines, ct)) bundle.Lines.Add(line);
+        Recalculate(bundle, request.BundlePrice);
+        bundle.UpdatedAt = DateTime.UtcNow;
+        bundle.ConcurrencyStamp++;
+        await _uow.SaveChangesAsync(ct);
+        return Map(bundle);
+    }
+
+    public async Task<BundleSaleDto> PostAsync(int bundleSaleId, CancellationToken ct = default)
+        {
+            await _posting.PostBundleAsync(bundleSaleId, ct);
+            var bundle = await _bundles.Query().AsNoTracking().Include(x => x.Lines)
+                .FirstAsync(x => x.BundleSaleId == bundleSaleId, ct);
+            return Map(bundle);
+        }
+
+    public async Task<BundleSaleDto> CancelAsync(int bundleSaleId, CancellationToken ct = default)
+    {
+        var bundle = await _bundles.Query().Include(x => x.Lines).FirstOrDefaultAsync(x => x.BundleSaleId == bundleSaleId, ct)
+            ?? throw new NotFoundException($"Bundle sale {bundleSaleId} was not found.");
+        if (bundle.Status != BundleSaleStatus.Draft)
+            throw new ConflictException($"Bundle sale {bundleSaleId} is {bundle.Status} and cannot be cancelled.");
+        bundle.Status = BundleSaleStatus.Cancelled;
+        bundle.UpdatedAt = DateTime.UtcNow;
+        bundle.ConcurrencyStamp++;
+        await _uow.SaveChangesAsync(ct);
+        return Map(bundle);
+    }
+
+    private async Task<List<BundleSaleLine>> BuildLinesAsync(
+        BundleSaleTemplate template, int warehouseId, IReadOnlyList<CreateBundleSaleTemplateLineRequest> requestLines, CancellationToken ct)
+    {
+        var lines = new List<BundleSaleLine>();
+        var sourceLines = requestLines.Count > 0
+            ? requestLines.OrderBy(x => x.SortOrder).ToList()
+            : template.Lines.OrderBy(x => x.SortOrder).Select(x => new CreateBundleSaleTemplateLineRequest
+            {
+                ItemId = x.ItemId,
+                WarehouseId = x.WarehouseId,
+                Qty = x.Qty,
+                UnitPrice = x.UnitPrice,
+                IncludeInBundle = x.IncludeInBundle,
+                SortOrder = x.SortOrder
+            }).ToList();
+
+        foreach (var r in sourceLines)
+        {
+            if (r.Qty <= 0)
+                throw new DomainException(ErrorCodes.Validation, "Bundle line quantity must be greater than zero.", 422);
+
+            // Bundle sales use the header warehouse as the source of truth for stock and pricing.
+            // Keep any per-line warehouse input from drifting away from the header.
+            var lineWarehouseId = warehouseId;
+
+            var item = await _items.Query().AsNoTracking().FirstAsync(x => x.ItemId == r.ItemId, ct);
+            await _sales.ValidateSalesLineAsync(warehouseId, r.ItemId, lineWarehouseId, r.Qty, 0m, null, ct);
+            var calc = _sales.ComputeLine(r.Qty, 0m, r.UnitPrice, SalesDiscountMode.Amount, 0m, 0m, 0m, 0m, false);
+            lines.Add(new BundleSaleLine
+            {
+                ItemId = r.ItemId,
+                Description = item.Name,
+                Qty = r.Qty,
+                WarehouseId = lineWarehouseId,
+                UnitPrice = r.UnitPrice,
+                LineTotal = calc.LineTotal,
+                IncludeInBundle = r.IncludeInBundle,
+                IsComponent = true,
+                ParentLineId = null
+            });
+        }
+        return lines;
+    }
+
+    private static void Recalculate(BundleSale bundle, decimal bundlePrice)
+    {
+        bundle.ComponentSubtotal = bundle.Lines.Where(x => x.IncludeInBundle).Sum(x => x.LineTotal);
+        bundle.BundlePrice = bundlePrice;
+        bundle.MarginAmount = bundle.BundlePrice - bundle.ComponentSubtotal;
+        bundle.DiscountTotal = Math.Max(0m, bundle.ComponentSubtotal - bundle.BundlePrice);
+        bundle.TaxTotal = 0m;
+        bundle.GrandTotal = bundle.BundlePrice + bundle.TaxTotal;
+    }
+
+    private static BundleSaleSummaryDto MapSummary(BundleSale x) => new(
+        x.BundleSaleId, x.BundleNo, x.BundleDate, x.CustomerId, x.CustomerSnapshotName, x.WarehouseId, x.BundleName, x.BundleCode, x.Status, x.ComponentSubtotal, x.BundlePrice, x.GrandTotal, x.CreatedAt);
+
+    private static BundleSaleDto Map(BundleSale x) => new(
+        x.BundleSaleId, x.BundleNo, x.BundleDate, x.CustomerId, x.CustomerSnapshotName, x.WarehouseId, x.CashierUserId, x.BundleSaleTemplateId,
+        x.BundleName, x.BundleCode, x.Status, x.ComponentSubtotal, x.BundlePrice, x.MarginAmount, x.DiscountTotal, x.TaxTotal, x.GrandTotal,
+        x.CreatedAt, x.UpdatedAt,
+        x.Lines.Select(l => new BundleSaleLineDto(l.BundleSaleLineId, l.ItemId, l.Description, l.Qty, l.WarehouseId, l.UnitPrice, l.LineTotal, l.IncludeInBundle, l.IsComponent, l.ParentLineId)).ToList());
+
+}

Backend/ERPCore/Services/CountService.cs

@@ -6,6 +6,7 @@ using ERPCore.Dtos.Stock;
 using ERPCore.Infra.Auth;
 using ERPCore.Infra.UoW;
 using ERPCore.Repositories.Interfaces;
+using ERPCore.Services.Gl;
 using ERPCore.Services.Interfaces;
 using ERPCore.System.Errors;
 using Microsoft.EntityFrameworkCore;
@@ -16,7 +17,9 @@ namespace ERPCore.Services;
 /// Stock-count service (FR-STK-08). Create snapshots system quantities (immutable,
 /// 02-SECURITY C.7); posting emits a variance <see cref="StockAdjustment"/> via the
 /// shared <see cref="IStockMutator"/> (a variance is an adjustment in disguise, C.7)
-/// and closes the count — all in one UoW transaction.
+/// and closes the count — all in one UoW transaction. GL posting for that variance
+/// mirrors <see cref="AdjustmentService"/>'s (same account config, same gain/loss
+/// split) since it's the exact same kind of document under the hood.
 /// </summary>
 public sealed class CountService : ICountService
 {
@@ -32,11 +35,16 @@ public sealed class CountService : ICountService
     private readonly INumberSequenceService _numbers;
     private readonly ICurrentUser _currentUser;
     private readonly IUnitOfWork _uow;
+    private readonly IGeneralLedgerService _gl;
+    private readonly string _glInventoryAccountCode;
+    private readonly string _glGainAccountCode;
+    private readonly string _glLossAccountCode;
 
     public CountService(
         IRepository<StockCount> counts, IRepository<StockAdjustment> adjustments, IRepository<Warehouse> warehouses,
         IRepository<Item> items, IRepository<ReasonCode> reasonCodes, IFifoCostingService fifo, IStockMutator mutator,
-        INumberSequenceService numbers, ICurrentUser currentUser, IUnitOfWork uow)
+        INumberSequenceService numbers, ICurrentUser currentUser, IUnitOfWork uow,
+        IGeneralLedgerService gl, IConfiguration configuration)
     {
         _counts = counts;
         _adjustments = adjustments;
@@ -48,6 +56,44 @@ public sealed class CountService : ICountService
         _numbers = numbers;
         _currentUser = currentUser;
         _uow = uow;
+        _gl = gl;
+        _glInventoryAccountCode = configuration["Adjustment:GlInventoryAccountCode"] ?? string.Empty;
+        _glGainAccountCode = configuration["Adjustment:GlGainAccountCode"] ?? string.Empty;
+        _glLossAccountCode = configuration["Adjustment:GlLossAccountCode"] ?? string.Empty;
+    }
+
+    /// <summary>Same logic as <c>AdjustmentService</c>'s private method of the same name — see there for why
+    /// gains/losses post as separate lines instead of a net.</summary>
+    private async Task<string?> PostAdjustmentJournalAsync(
+        string docNo, DateTime now, IReadOnlyList<StockLedger> refs, CancellationToken ct)
+    {
+        var gain = refs.Where(r => r.Direction == Direction.In).Sum(r => r.Value);
+        var loss = refs.Where(r => r.Direction == Direction.Out).Sum(r => r.Value);
+        if (gain <= 0 && loss <= 0) return null;
+
+        var period = await _gl.GetPeriodByDateAsync(DateOnly.FromDateTime(now), ct);
+        var lines = new List<GlJournalEntryLineRequest>();
+        if (gain > 0)
+        {
+            lines.Add(new GlJournalEntryLineRequest(_glInventoryAccountCode, gain, 0m, $"Adjustment {docNo} — stock increase"));
+            lines.Add(new GlJournalEntryLineRequest(_glGainAccountCode, 0m, gain, $"Adjustment {docNo} — inventory gain"));
+        }
+        if (loss > 0)
+        {
+            lines.Add(new GlJournalEntryLineRequest(_glLossAccountCode, loss, 0m, $"Adjustment {docNo} — inventory loss"));
+            lines.Add(new GlJournalEntryLineRequest(_glInventoryAccountCode, 0m, loss, $"Adjustment {docNo} — stock decrease"));
+        }
+
+        var result = await _gl.PostJournalEntryAsync(new GlJournalEntryRequest
+        {
+            PeriodId = period.PeriodId,
+            EntryDate = DateOnly.FromDateTime(now),
+            SourceModule = "ADJUSTMENT",
+            Reference = docNo,
+            Narration = $"Stock adjustment {docNo}",
+            Lines = lines
+        }, ct);
+        return result.JournalNo;
     }
 
     public async Task<PagedResponse<CountSummaryDto>> ListAsync(
@@ -160,7 +206,7 @@ public sealed class CountService : ICountService
         {
             count.Status = CountStatus.Posted;
             await _uow.SaveChangesAsync(ct);
-            return new CountPostResultDto(count.CountId, count.Status, null, Array.Empty<int>());
+            return new CountPostResultDto(count.CountId, count.Status, null, null, Array.Empty<int>());
         }
 
         var reason = await _reasonCodes.Query().AsNoTracking()
@@ -168,7 +214,7 @@ public sealed class CountService : ICountService
             ?? throw new DomainException(ErrorCodes.Validation, $"Reason code '{VarianceReasonCode}' (Count Variance) is not configured.", 422);
 
         var now = DateTime.UtcNow;
-        var (adjustmentId, ledgerEntries) = await _uow.ExecuteInTransactionAsync(async token =>
+        var (adjustmentId, glJournalNo, ledgerEntries) = await _uow.ExecuteInTransactionAsync(async token =>
         {
             var docNo = await _numbers.NextAsync(DocumentTypes.Adjustment, token);
             var adjustment = new StockAdjustment
@@ -191,12 +237,15 @@ public sealed class CountService : ICountService
 
             var refs = await _mutator.ApplyAsync(count.WarehouseId, DocumentTypes.Adjustment, adjustment.AdjustmentId, now, deltas, token);
 
+            adjustment.GlJournalNo = await PostAdjustmentJournalAsync(docNo, now, refs, token);
+            if (adjustment.GlJournalNo is not null) adjustment.GlPostedAt = now;
+
             count.Status = CountStatus.Posted;
-            return (adjustment.AdjustmentId, refs);
+            return (adjustment.AdjustmentId, adjustment.GlJournalNo, refs);
         }, ct);
 
         // Map ledger ids after commit so they are populated.
-        return new CountPostResultDto(count.CountId, count.Status, adjustmentId, ledgerEntries.Select(r => r.LedgerId).ToList());
+        return new CountPostResultDto(count.CountId, count.Status, adjustmentId, glJournalNo, ledgerEntries.Select(r => r.LedgerId).ToList());
     }
 
     private static CountDto Map(StockCount c) => new(