feat(programmer): sheet-driven stats, monitor status, drill-down history

- Wire daySheetsForUserProvider(userId) into ProgrammerDashboard so
  computeProgrammerStats/computeBadges receive real sheet data instead of
  the placeholder const <ProgrammerDaySheet>[].
- Monitor tab: watch allDaySheetsProvider and build sheetStatusByUser map
  for today; pass it to buildMonitorEntries; add "Sheets pending" chip
  (pending + disapproved today) to the summary row.
- ProgrammerDrillDownScreen: add _RecentDaySheetsPanel below the dashboard
  showing the last 10 sheets (date + status pill) with tap-to-daySheetDetail.
- DaySheetDetailScreen (T17 gaps): replace const [] liveRows with
  programmerDayDataProvider(sheet.workDate) built rows for non-approved
  sheets; fix _onApprove timer check to filter only the sheet programmer's
  own tasks (QN-1).
- Add test/programmer_drill_down_test.dart (3 tests, all passing).

Co-Authored-By: claude-flow <ruv@ruv.net>

lib/screens/programmer_tasks/dashboard/programmer_dashboard.dart

@@ -7,6 +7,7 @@ import '../../../models/programmer_task.model.dart';
 import '../../../providers/leave_provider.dart';
 import '../../../providers/profile_provider.dart';
 import '../../../providers/programmer_day_data_provider.dart';
+import '../../../providers/programmer_day_sheets_provider.dart';
 import '../../../providers/programmer_tasks_provider.dart';
 import '../../../utils/app_time.dart';
 import '../../../utils/programmer_daily_time.dart';
@@ -43,6 +44,9 @@ class ProgrammerDashboard extends ConsumerWidget {
 
     final now = ref.watch(clockTickerProvider).valueOrNull ?? AppTime.now();
 
+    final sheetsAsync = ref.watch(daySheetsForUserProvider(userId));
+    final sheets = sheetsAsync.valueOrNull ?? const <ProgrammerDaySheet>[];
+
     final tasks = tasksAsync.valueOrNull ?? const [];
     final profileById = <String, Profile>{
       for (final p in profilesAsync.valueOrNull ?? <Profile>[]) p.id: p,
@@ -75,7 +79,7 @@ class ProgrammerDashboard extends ConsumerWidget {
       userId: userId,
       now: now,
       tasks: tasks,
-      sheets: const <ProgrammerDaySheet>[],
+      sheets: sheets,
       leaveDays: leaveDays,
       todayFocus: todayFocus,
     );