update detail.

API/ROLAC.API/Services/FinanceDashboardService.cs

@@ -53,17 +53,24 @@ public class FinanceDashboardService : IFinanceDashboardService
         DateOnly? from, DateOnly? to, int? ministryId, int? categoryGroupId)
     {
         var q = PaidApproved(from, to);
-        if (ministryId.HasValue)      q = q.Where(e => e.MinistryId == ministryId.Value);
-        if (categoryGroupId.HasValue) q = q.Where(e => e.CategoryGroupId == categoryGroupId.Value);
+        if (ministryId.HasValue) q = q.Where(e => e.MinistryId == ministryId.Value);
 
-        // Group by the deepest level whose parent id is supplied.
+        // Lines belonging to the scoped (Paid+Approved, optionally ministry-filtered) expenses.
+        var scopedLines = from l in _db.ExpenseLines
+                          join e in q on l.ExpenseId equals e.Id
+                          select l;
+
+        // Group by the deepest level whose parent id is supplied. Category levels aggregate
+        // over LINES (line amounts); the ministry level uses the header total to avoid
+        // double-counting a multi-line expense across its lines.
         List<(int Id, decimal Amount)> grouped;
         if (categoryGroupId.HasValue)
-            grouped = (await q.GroupBy(e => e.SubCategoryId)
+            grouped = (await scopedLines.Where(l => l.CategoryGroupId == categoryGroupId.Value)
+                .GroupBy(l => l.SubCategoryId)
                 .Select(g => new { Id = g.Key, Amount = g.Sum(x => x.Amount) }).ToListAsync())
                 .Select(x => (x.Id, x.Amount)).ToList();
         else if (ministryId.HasValue)
-            grouped = (await q.GroupBy(e => e.CategoryGroupId)
+            grouped = (await scopedLines.GroupBy(l => l.CategoryGroupId)
                 .Select(g => new { Id = g.Key, Amount = g.Sum(x => x.Amount) }).ToListAsync())
                 .Select(x => (x.Id, x.Amount)).ToList();
         else