feat(giving): include Sunday attendance total in offering session list

API/ROLAC.API/DTOs/Giving/OfferingSessionListItemDto.cs

@@ -11,4 +11,5 @@ public class OfferingSessionListItemDto
     public decimal Difference  { get; set; }
     public int     LineCount   { get; set; }
     public bool    HasProof    { get; set; }
+    public int?    SundayAttendanceCount { get; set; }  // null = no attendance recorded for the date
 }

API/ROLAC.API/Services/OfferingSessionService.cs

@@ -45,6 +45,11 @@ public class OfferingSessionService : IOfferingSessionService
             .Select(grp => new { Id = grp.Key, Count = grp.Count() })
             .ToDictionaryAsync(x => x.Id, x => x.Count);
 
+        var dates = rows.Select(r => r.SessionDate).ToList();
+        var attendance = await _db.MealAttendances.AsNoTracking()
+            .Where(a => dates.Contains(a.AttendanceDate))
+            .ToDictionaryAsync(a => a.AttendanceDate, a => a.AdultCount + a.YouthCount + a.KidCount);
+
         var items = rows.Select(s => new OfferingSessionListItemDto
         {
             Id = s.Id, SessionDate = s.SessionDate.ToString("yyyy-MM-dd"), Status = s.Status,
@@ -52,6 +57,7 @@ public class OfferingSessionService : IOfferingSessionService
             SystemTotal = s.SystemTotal, Difference = s.Difference,
             LineCount = counts.TryGetValue(s.Id, out var c) ? c : 0,
             HasProof = s.ProofPdfPath != null,
+            SundayAttendanceCount = attendance.TryGetValue(s.SessionDate, out var att) ? att : (int?)null,
         }).ToList();
 
         return new PagedResult<OfferingSessionListItemDto>