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/Controllers/DashboardController.cs

@@ -12,12 +12,25 @@ namespace ERPCore.Controllers;
 public sealed class DashboardController : ApiControllerBase
 {
     private readonly IDashboardService _dashboard;
+    private readonly IDashboardChartsService _charts;
 
-    public DashboardController(IDashboardService dashboard) => _dashboard = dashboard;
+    public DashboardController(IDashboardService dashboard, IDashboardChartsService charts)
+    {
+        _dashboard = dashboard;
+        _charts = charts;
+    }
 
-    /// <summary>Aggregate counts for stock, GRN, and procurement.</summary>
+    /// <summary>Aggregate counts for stock, GRN, procurement, sales, accounts, service, production and HR.</summary>
     [HttpGet("stats")]
     [ProducesResponseType(typeof(DashboardStatsDto), StatusCodes.Status200OK)]
-    public async Task<ActionResult<DashboardStatsDto>> GetStats([FromQuery] int? branchId, CancellationToken ct)
-        => Ok(await _dashboard.GetStatsAsync(branchId, ct));
+    public async Task<ActionResult<DashboardStatsDto>> GetStats(
+        [FromQuery] int? branchId, [FromQuery] DateOnly? from, [FromQuery] DateOnly? to, CancellationToken ct)
+        => Ok(await _dashboard.GetStatsAsync(branchId, from, to, ct));
+
+    /// <summary>Datasets for the dashboard graphs; the time-based ones follow the optional from / to period.</summary>
+    [HttpGet("charts")]
+    [ProducesResponseType(typeof(DashboardChartsDto), StatusCodes.Status200OK)]
+    public async Task<ActionResult<DashboardChartsDto>> GetCharts(
+        [FromQuery] int? branchId, [FromQuery] DateOnly? from, [FromQuery] DateOnly? to, CancellationToken ct)
+        => Ok(await _charts.GetChartsAsync(branchId, from, to, ct));
 }