Add self-hosted auth, admin API, and owner web dashboard

- Replace Clerk with self-hosted JWT auth (register/login/verify, bcrypt
  passwords, Gmail OTP with console fallback)
- Add lib/db.ts pg pool + transaction helpers; seed script migrates legacy
  Clerk-era schema (drop clerk_id, enforce UUID ids and unique email)
- Add owner-gated admin API: stats, users, drivers CRUD, rides
- Add dashboard/ Vite React owner dashboard (login, overview, users,
  fleet, rides) with dev-server proxy to avoid Expo CORS middleware
- Add scripts/set-owner.mjs for role management

.env.example

@@ -1,14 +1,25 @@
 # .env
 
-# clerk publishable key
-EXPO_PUBLIC_CLERK_PUBLISHABLE_KEY=pk_test_YOUR_KEY_HERE
+# jwt secret for self-hosted auth sessions (generate with: openssl rand -hex 32)
+AUTH_JWT_SECRET=XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
 
-# postgres db url (neon db) 
-DATABASE_URL="postgresql://username:password@hostname:port/uber-clone?sslmode=require"
+# postgres db url (self-hosted, e.g. postgresql://user:password@localhost:5432/waseel)
+DATABASE_URL="postgresql://username:password@hostname:port/waseel"
 
 # expo api server url (you can set it to any random url for development)
 EXPO_PUBLIC_SERVER_URL="https://example.com/"
 
+# google oauth client ids (from Google Cloud console, type "Web/iOS/Android")
+EXPO_PUBLIC_GOOGLE_AUTH_WEB_CLIENT_ID=XXXXXXXX.apps.googleusercontent.com
+EXPO_PUBLIC_GOOGLE_AUTH_IOS_CLIENT_ID=XXXXXXXX.apps.googleusercontent.com
+EXPO_PUBLIC_GOOGLE_AUTH_ANDROID_CLIENT_ID=XXXXXXXX.apps.googleusercontent.com
+
+# gmail api (oauth refresh token with gmail.send scope; leave blank to log codes to server console)
+GMAIL_CLIENT_ID=
+GMAIL_CLIENT_SECRET=
+GMAIL_REFRESH_TOKEN=
+GMAIL_FROM="Waseel <you@gmail.com>"
+
 # geoapify api key
 EXPO_PUBLIC_GEOAPIFY_API_KEY=XXXXXXXXXXXXXXXXXXXXXXXXXXXXX