Phase 1 scaffold: auth for all apps

- Backend: Fastify with two listeners (public + internal), routes, services, DB migration + seed
- client_app: Flutter with BLoC, all auth screens (welcome, display name, register, OTP, force-register)
- mitra_app: Flutter with BLoC, OTP-only login
- control_center: React + Vite, email/password login, mitra/user management, anonymity settings
- Docs: phase1 plan, API contract, client app mockup
- CLAUDE.md and shared memory for all subprojects

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

mitra_app/pubspec.yaml

@@ -0,0 +1,34 @@
+name: mitra_app
+description: Halo Bestie - Mitra App
+
+publish_to: 'none'
+version: 1.0.0+1
+
+environment:
+  sdk: '>=3.0.0 <4.0.0'
+
+dependencies:
+  flutter:
+    sdk: flutter
+
+  # Firebase
+  firebase_core: ^2.27.1
+  firebase_auth: ^4.18.0
+
+  # HTTP
+  dio: ^5.4.3
+
+  # State management
+  flutter_bloc: ^8.1.5
+  equatable: ^2.0.5
+
+  # Navigation
+  go_router: ^13.2.1
+
+dev_dependencies:
+  flutter_test:
+    sdk: flutter
+  flutter_lints: ^3.0.0
+
+flutter:
+  uses-material-design: true