feat(dashboard): add date filter and stat groups components

- Implemented DashboardDateFilter component for selecting date ranges.
- Created DashboardStatGroups component to display various dashboard statistics.
- Added dashboard chart data processing logic to support new chart specifications.
- Introduced reusable Chart components for rendering different types of charts.

Backend/ERPCore/Dtos/Dashboard/DashboardDtos.cs

@@ -10,6 +10,9 @@ namespace ERPCore.Dtos.Dashboard;
 /// Recent movements isn't here — it's just GET /stock/ledger with a small pageSize, no
 /// aggregation needed. A single computed-on-read object, not a stored entity — same as
 /// reorder alerts (docs/11 §5.7).
+/// Most counts are a snapshot of what is open right now. The few that describe activity
+/// (sales returns, bundle sales, bank deposits, employees present) are counted inside the
+/// optional From-To period the dashboard filter sends (default: today).
 /// </summary>
 public sealed record DashboardStatsDto(
     int LowStockAlerts,
@@ -24,7 +27,37 @@ public sealed record DashboardStatsDto(
     int OpenRfqs,
     int PendingLeaveRequests,
     int OverdueSalesInvoices,
-    IReadOnlyList<MonthlyPurchasesVsSalesDto> MonthlyPurchasesVsSales);
+    IReadOnlyList<MonthlyPurchasesVsSalesDto> MonthlyPurchasesVsSales,
+    // Stock & warehouse
+    int BatchesExpiringSoon,
+    int TransfersInTransit,
+    int DraftStockAdjustments,
+    int WastagePendingApproval,
+    // Approvals
+    int PendingApprovals,
+    int PriceAdjustmentsPending,
+    // Sales (SalesReturns and BundleSales are counted inside the From-To period)
+    int DraftSalesInvoices,
+    int DraftSalesSlips,
+    int SalesReturns,
+    int BundleSales,
+    // Purchasing
+    int PurchaseReturnsPending,
+    int UnpaidPurchaseInvoices,
+    // Money
+    decimal CashInHand,
+    decimal BankDeposits,
+    // Service & warranty
+    int OpenSupportTickets,
+    int WarrantiesExpiringSoon,
+    int WarrantyClaimsOpen,
+    // Production
+    int ProductionRunsInProgress,
+    // HR
+    int PayrollRunsPending,
+    int AttendanceBatchesPending,
+    int EmployeesPresent,
+    int TotalActiveEmployees);
 
 /// <summary>One bar in the Stock Valuation chart — total FIFO layer value for a warehouse.</summary>
 public sealed record WarehouseValuationDto(int WarehouseId, decimal Total);