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_waiter/pubspec.yaml

@@ -0,0 +1,48 @@
+name: meezi_waiter
+description: Meezi Waiter — real-time notification app for cafe staff
+publish_to: "none"
+version: 1.0.0+1
+
+environment:
+  sdk: ">=3.3.0 <4.0.0"
+  flutter: ">=3.19.0"
+
+dependencies:
+  flutter:
+    sdk: flutter
+  flutter_localizations:
+    sdk: flutter
+
+  # State management
+  flutter_riverpod: ^2.5.1
+
+  # Navigation
+  go_router: ^14.2.0
+
+  # HTTP
+  dio: ^5.4.3
+
+  # Secure token storage
+  flutter_secure_storage: ^9.2.2
+
+  # SignalR (ASP.NET Core compatible)
+  signalr_netcore: ^1.3.5
+
+  # Local notifications (foreground + background alerts)
+  flutter_local_notifications: ^17.2.3
+
+  # Persian date
+  shamsi_date: ^1.1.1
+
+  # Shared prefs for non-sensitive settings
+  shared_preferences: ^2.3.2
+
+  intl: ^0.19.0
+
+dev_dependencies:
+  flutter_test:
+    sdk: flutter
+  flutter_lints: ^4.0.0
+
+flutter:
+  uses-material-design: true