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>

backend/package.json

@@ -0,0 +1,25 @@
+{
+  "name": "halo-bestie-backend",
+  "version": "1.0.0",
+  "description": "Halo Bestie backend API",
+  "main": "src/server.js",
+  "type": "module",
+  "scripts": {
+    "dev": "node --watch src/server.js",
+    "start": "node src/server.js",
+    "db:migrate": "node src/db/migrate.js",
+    "db:seed": "node src/db/seed.js"
+  },
+  "dependencies": {
+    "fastify": "^4.28.1",
+    "@fastify/sensible": "^5.6.0",
+    "firebase-admin": "^12.2.0",
+    "pg": "^8.12.0",
+    "postgres": "^3.4.4",
+    "zod": "^3.23.8",
+    "dotenv": "^16.4.5"
+  },
+  "devDependencies": {
+    "@types/pg": "^8.11.6"
+  }
+}