Implement store credit tracking and enforcement

Introduced StoreCreditMovement entity and migration to track store credit usage and settlements. Updated payment flow to enforce credit limits and record credit movements. Modified outstanding balance calculation to use credit movements. Enhanced frontend to display real-time credit info and prevent over-credit payments. Updated API types, seed data, and DI registrations accordingly.

Distribution/Features/Invoice/InvoiceDTOs.cs

@@ -10,6 +10,7 @@ public record PrintInvoiceRequest(Guid? PrintedByUserId = null);
 public record InvoiceResponse(
     Guid Id,
     Guid ShopPOId,
+    Guid StoreId,
     string StoreName,
     InvoiceStatus Status,
     PaymentStatus PaymentStatus,
@@ -19,6 +20,7 @@ public record InvoiceResponse(
     DateTime? FinalizedAt,
     Guid? FinalizedBy,
     decimal TotalAmount,
+    decimal PaidAmount,
     bool IsActive,
     DateTime CreatedAt);
 

Distribution/Features/Invoice/InvoiceRepository.cs

@@ -21,6 +21,7 @@ public class InvoiceRepository(AppDBContext context) : IInvoiceRepository
     public async Task<List<Models.Invoice>> GetAllAsync(Guid? agentId, Guid? routeId, Guid? shopId, InvoiceStatus? status, PaymentStatus? paymentStatus, int page, int pageSize) =>
         await context.Invoices
             .Include(i => i.ShopPO).ThenInclude(p => p.Store)
+            .Include(i => i.Payments.Where(p => p.IsActive))
             .Where(i => i.IsActive
                 && (agentId == null || i.ShopPO.RaisedById == agentId)
                 && (routeId == null || i.ShopPO.Store.FK_RouteId == routeId)

Distribution/Features/Invoice/InvoiceService.cs

@@ -12,11 +12,14 @@ public class InvoiceService(
 {
     private static InvoiceResponse ToResponse(Models.Invoice i) =>
         new(i.Id, i.FK_ShopPOId,
+            i.ShopPO?.FK_StoreId ?? Guid.Empty,
             i.ShopPO?.Store?.StoreName ?? string.Empty,
             i.Status, i.PaymentStatus, i.CreatedBy,
             i.PrintedAt, i.PrintedBy,
             i.FinalizedAt, i.FinalizedBy,
-            i.TotalAmount, i.IsActive, i.CreatedAt);
+            i.TotalAmount,
+            i.Payments?.Where(p => p.IsActive).Sum(p => p.Amount) ?? 0m,
+            i.IsActive, i.CreatedAt);
 
     public async Task<InvoiceResponse?> GetByIdAsync(Guid id)
     {