Phase 3.4: backend self-managed auth cutover

All backend auth now goes through our own token service — Firebase Auth
dependency is fully removed from auth paths. FCM (firebase-admin messaging)
is still used for push.

Schema:
- auth_sessions (multi-device refresh tokens, bcrypt-hashed)
- otp_requests (Fazpass reference + rate-limit history)
- customers.email + google_sub + apple_sub (social identity)
- control_center_users.password_hash + failed_login_count + lockout_until
- firebase_uid columns made nullable (drop in later cleanup migration)
- 6 new app_config keys for OTP + CC lockout tuning

Services:
- password.service.js — bcrypt cost 12 + complexity (min 8, digit + upper +
  lower)
- token.service.js — JWT HS256 access (1h) + opaque refresh (30d, bcrypt-
  hashed, rotated on use); session_id claim pre-wires future Valkey-based
  instant revocation; revokeSession + revokeAllSessionsForUser helpers
- social-identity.service.js — Google via google-auth-library, Apple via
  jwks-rsa + jsonwebtoken
- otp.service.js — Fazpass stub (generates locally, logs the code) clearly
  marked for replacement once real API docs arrive; rate-limit + resend
  cooldown + verify-attempts all configurable via app_config
- auth.service.js — orchestrator: signInAnonymous, completeCustomer/Mitra-
  PhoneSignIn, signInWithGoogle, signInWithApple, signInCcUser, refresh,
  logout; reject-on-existing for identity conflicts
- cc-user.service.js — email+password helpers + lockout counters

Routes & middleware:
- authenticate middleware now verifies our JWT and attaches
  request.auth = { userType, userId, sessionId }
- WebSocket handshake verifies our JWT (no more Firebase lookup)
- All existing routes updated to use request.auth.userId instead of
  request.firebaseUser.uid
- New public routes:
    /api/shared/auth/anonymous /refresh /logout
    /api/client/auth/otp/request /otp/verify /google /apple /me /profile
    /api/mitra/auth/otp/request /otp/verify /me
- New internal routes:
    /internal/auth/login /refresh /logout /me (httpOnly cookie refresh)
    /internal/control-center-users (accepts plain password, bcrypt-hashed)
    /internal/control-center-users/me/password (self-service change)
    /internal/control-center-users/:id/password (admin forced reset)
- Deleted legacy customer.routes.js (anonymous + link handled by auth now)
- app.internal.js: @fastify/cookie + CORS credentials for CC httpOnly cookie

Config:
- AUTH_JWT_SECRET + ACCESS_TOKEN_TTL_SECONDS + REFRESH_TOKEN_TTL_DAYS env
- FAZPASS_* env vars (TBD until real API docs)
- GOOGLE_OAUTH_CLIENT_IDS, APPLE_SERVICES_ID/TEAM_ID/KEY_ID/PRIVATE_KEY
- ADMIN_EMAIL + ADMIN_PASSWORD for seed
- CC_ORIGIN for internal-app CORS origin allowlist

Dependencies:
- Added: bcrypt, jsonwebtoken, jwks-rsa, google-auth-library, @fastify/cookie
- Kept: firebase-admin (messaging only)

Still outstanding: Fazpass API integration (stub in place), Apple Developer
prereqs for end-to-end iOS testing, client_app/mitra_app/control_center auth
flow rewrites.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

backend/src/routes/public/mitra.auth.routes.js

@@ -1,44 +1,75 @@
 import { authenticate } from '../../plugins/auth.js'
-import { getMitraByFirebaseUid, getMitraByPhone, setMitraFirebaseUid } from '../../services/mitra.service.js'
+import { getMitraById } from '../../services/mitra.service.js'
+import { completeMitraPhoneSignIn } from '../../services/auth.service.js'
+import { requestOtp, verifyOtp } from '../../services/otp.service.js'
+import { UserType } from '../../constants.js'
+
+const extractDeviceInfo = (request) => ({
+  user_agent: request.headers['user-agent'] || null,
+  ip: request.ip || null,
+})
+
+const sendAuthError = (reply, err) => reply.code(err.statusCode || 500).send({
+  success: false,
+  error: { code: err.code || 'INTERNAL', message: err.message },
+})
 
 export const mitraAuthRoutes = async (app) => {
-  app.post('/verify', { preHandler: authenticate }, async (request, reply) => {
-    const { uid, phone_number } = request.firebaseUser
-
-    // First try lookup by firebase_uid (returning user)
-    let mitra = await getMitraByFirebaseUid(uid)
-
-    // First-time login: link firebase_uid to mitra record via phone number
-    if (!mitra && phone_number) {
-      mitra = await getMitraByPhone(phone_number)
-      if (mitra) {
-        await setMitraFirebaseUid(mitra.id, uid)
-      }
+  app.post('/otp/request', async (request, reply) => {
+    const { phone, channel } = request.body || {}
+    try {
+      const result = await requestOtp({
+        phone,
+        userType: UserType.MITRA,
+        ipAddress: request.ip,
+        channel,
+      })
+      return reply.send({ success: true, data: result })
+    } catch (err) {
+      return sendAuthError(reply, err)
     }
+  })
 
+  app.post('/otp/verify', async (request, reply) => {
+    const { otp_request_id, code } = request.body || {}
+    try {
+      const { phone, user_type } = await verifyOtp({ otpRequestId: otp_request_id, code })
+      if (user_type !== UserType.MITRA) {
+        return reply.code(400).send({
+          success: false,
+          error: { code: 'WRONG_FLOW', message: 'This OTP was issued for a different user type' },
+        })
+      }
+      const { tokens, profile } = await completeMitraPhoneSignIn({
+        phone,
+        deviceInfo: extractDeviceInfo(request),
+      })
+      if (!profile.is_active) {
+        return reply.code(403).send({
+          success: false,
+          error: { code: 'ACCOUNT_INACTIVE', message: 'Account is inactive. Contact your administrator.' },
+        })
+      }
+      return reply.send({ success: true, data: { ...tokens, profile } })
+    } catch (err) {
+      return sendAuthError(reply, err)
+    }
+  })
+
+  app.get('/me', { preHandler: authenticate }, async (request, reply) => {
+    if (request.auth.userType !== UserType.MITRA) {
+      return reply.code(403).send({
+        success: false,
+        error: { code: 'FORBIDDEN', message: 'Mitra account required' },
+      })
+    }
+    const mitra = await getMitraById(request.auth.userId)
     if (!mitra) {
       return reply.code(404).send({
         success: false,
-        error: { code: 'ACCOUNT_NOT_FOUND', message: 'Account not found. Contact your administrator.' },
+        error: { code: 'NOT_FOUND', message: 'Mitra account not found' },
       })
     }
-
-    if (!mitra.is_active) {
-      return reply.code(403).send({
-        success: false,
-        error: { code: 'ACCOUNT_INACTIVE', message: 'Account is inactive. Contact your administrator.' },
-      })
-    }
-
-    return reply.send({
-      success: true,
-      data: {
-        id: mitra.id,
-        display_name: mitra.display_name,
-        phone: mitra.phone,
-        is_active: mitra.is_active,
-        created_at: mitra.created_at,
-      },
-    })
+    return reply.send({ success: true, data: mitra })
   })
 }