chore: Flutter mobile app, CI, and dev tooling

- mobile/: Flutter/Dart merchant mobile app skeleton
- .github/: GitHub Actions CI workflows
- .dockerignore: exclude host node_modules from build context
- .cursorrules: Cursor IDE project rules
- .claude/: Claude Code project settings and launch config

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

mobile/meezi_app/lib/features/hr/hr_providers.dart

@@ -0,0 +1,31 @@
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+
+import '../../core/sync/sync_engine.dart';
+import '../cart/cart_state.dart' show apiClientProvider;
+import 'hr_api.dart';
+
+class HrSession {
+  const HrSession({required this.cafeId, required this.employeeId});
+  final String cafeId;
+  final String employeeId;
+}
+
+const _demoCafeId = 'cafe_demo_001';
+const _demoEmployeeId = 'emp_demo_owner';
+
+final hrApiProvider = Provider<HrApi>((ref) => HrApi(ref.watch(apiClientProvider)));
+
+final syncEngineProvider = Provider<SyncEngine>((ref) => SyncEngine());
+
+final hrSessionProvider = Provider<HrSession?>(
+  (_) => const HrSession(cafeId: _demoCafeId, employeeId: _demoEmployeeId),
+);
+
+final todayShiftProvider = FutureProvider<Map<String, dynamic>?>((ref) async {
+  final session = ref.watch(hrSessionProvider);
+  if (session == null) return null;
+  return ref.watch(hrApiProvider).fetchTodayShift(
+        cafeId: session.cafeId,
+        employeeId: session.employeeId,
+      );
+});