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

lib/pricing.ts

@@ -0,0 +1,34 @@
+// Fare model tuned to the Lebanese market:
+// - Distance-based with a base fare (like CTaxi/local taxis), not time-only.
+// - Typical Beirut rides land in the $3–8 range riders expect.
+// - Prices are quoted in USD (the de facto ride-hailing currency) with an
+//   L.B.P. equivalent shown for cash settlement.
+
+export const FARE = {
+  base: 1.5, // USD, flag drop
+  perKm: 0.55, // USD per kilometer of the trip
+  perMin: 0.15, // USD per minute of the trip
+  minimum: 3.0, // USD minimum fare
+} as const;
+
+// Parallel market rate used for the L.B.P. cash equivalent shown in-app.
+export const LBP_RATE = 89500;
+
+export const calculateFare = ({
+  distanceMeters,
+  durationSeconds,
+}: {
+  distanceMeters: number;
+  durationSeconds: number;
+}): string => {
+  const km = distanceMeters / 1000;
+  const minutes = durationSeconds / 60;
+
+  const fare = FARE.base + km * FARE.perKm + minutes * FARE.perMin;
+
+  return Math.max(fare, FARE.minimum).toFixed(2);
+};
+
+// Rounds to the nearest 1,000 L.B.P. — the smallest practical cash note.
+export const formatLBP = (usd: number): string =>
+  `${(Math.round((usd * LBP_RATE) / 1000) * 1000).toLocaleString("en-US")} L.B.P.`;