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/src/server.js

@@ -0,0 +1,23 @@
+import 'dotenv/config'
+import { buildPublicApp } from './app.public.js'
+import { buildInternalApp } from './app.internal.js'
+
+const PUBLIC_PORT = process.env.PUBLIC_PORT || 3000
+const INTERNAL_PORT = process.env.INTERNAL_PORT || 3001
+const INTERNAL_HOST = process.env.INTERNAL_HOST || '127.0.0.1'
+
+const start = async () => {
+  const publicApp = await buildPublicApp()
+  const internalApp = await buildInternalApp()
+
+  await publicApp.listen({ port: PUBLIC_PORT, host: '0.0.0.0' })
+  console.log(`Public API listening on port ${PUBLIC_PORT}`)
+
+  await internalApp.listen({ port: INTERNAL_PORT, host: INTERNAL_HOST })
+  console.log(`Internal API listening on ${INTERNAL_HOST}:${INTERNAL_PORT}`)
+}
+
+start().catch((err) => {
+  console.error(err)
+  process.exit(1)
+})