feat: Enhance Stock Ledger functionality with item details and filters

- Updated StockService to compute running balance on read and include item SKU, name, category, and brand in StockLedgerRowDto.
- Modified GetLedgerAsync method to accept categoryId and brandId parameters for filtering.
- Enhanced StockController to support new query parameters for ledger retrieval.
- Updated StockDtos to include additional item information in StockLedgerRowDto.
- Adjusted frontend Stock Ledger page to display item details and implement searchable item picker.
- Added tests for StockLedger to verify running balance calculations and filtering by category and brand.
- Updated appsettings for service URLs and modified login page navigation logic.

Backend/ERPCore.Tests/LowStockAlertServiceTests.cs

@@ -91,7 +91,8 @@ public class LowStockAlertServiceTests
         public Task<IReadOnlyDictionary<int, decimal>> GetAvailableByItemAsync(int warehouseId, CancellationToken ct = default)
             => throw new NotSupportedException();
         public Task<PagedResponse<StockLedgerRowDto>> GetLedgerAsync(int? itemId, int? warehouseId, int? branchId, DateOnly? from, DateOnly? to,
-            string? sourceDocType, int? sourceDocId, PageQuery query, CancellationToken ct = default) => throw new NotSupportedException();
+            string? sourceDocType, int? sourceDocId, PageQuery query, CancellationToken ct = default,
+            int? categoryId = null, int? brandId = null) => throw new NotSupportedException();
         public Task<StockValuationDto> GetValuationAsync(int itemId, int warehouseId, CancellationToken ct = default)
             => throw new NotSupportedException();
     }