feat(report): accomplishment report dialog + entry points

Add AccomplishmentReportDialog with programmer/admin modes, date-range
filter (default this month), and include-unapproved toggle. Wire into
DaySheetsTab app-bar action, ApprovalsTab app-bar action, and
ProgrammerDrillDownScreen app-bar button.

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

lib/screens/programmer_tasks/programmer_drill_down_screen.dart

@@ -12,6 +12,7 @@ import '../../widgets/app_section_header.dart';
 import '../../widgets/app_state_view.dart';
 import '../../widgets/status_pill.dart';
 import 'dashboard/programmer_dashboard.dart';
+import 'report/accomplishment_report_dialog.dart';
 
 /// Admin-only drill-down screen that shows [ProgrammerDashboard] for a
 /// specific user in read-only mode, plus their recent day sheets history.
@@ -52,7 +53,20 @@ class ProgrammerDrillDownScreen extends ConsumerWidget {
     final name = profile?.fullName ?? 'Programmer';
 
     return Scaffold(
-      appBar: AppBar(title: Text(name)),
+      appBar: AppBar(
+        title: Text(name),
+        actions: [
+          OutlinedButton(
+            onPressed: () => showAccomplishmentReportDialog(
+              context,
+              ref,
+              programmerId: userId,
+            ),
+            child: const Text('Generate Accomplishment Report'),
+          ),
+          const SizedBox(width: 8),
+        ],
+      ),
       body: Column(
         crossAxisAlignment: CrossAxisAlignment.stretch,
         children: [