Build driver app, Uber-style dispatch, POI suggestions; fix map tiles

Driver side (was a stub):
- In-app driver onboarding: a driver-role user creates their own linked
  drivers profile (driver/profile+api GET/POST/PATCH).
- Driver dashboard: online/offline toggle, today's earnings, incoming
  request cards (accept/decline), active ride panel (start/complete trip).
  Polls /driver/rides every 4s while online.
- Location heartbeat (use-driver-location): watchPositionAsync pings
  /driver/location every ~5s; restarts the watch on app foreground so a
  backgrounded driver doesn't go permanently stale and miss requests.

Dispatch (auto-match nearest, Uber-style):
- Ride state machine: requested -> accepted -> en_route -> completed/cancelled
  with a nullable driver_id until matched (lib/dispatch.matchNextDriver).
- matchNextDriver locks the ride (SELECT FOR UPDATE), expires 15s-stale
  offers, picks the nearest eligible driver of the matching service by
  haversine, offers one at a time. Called from ride/create, ride/[id] GET
  (lazy match on the rider's poll), and ride/[id]/respond (on decline).
- ride/create is now a request endpoint (driver_id NULL, status=requested,
  service); drops the pre-match driver_id payment reconciliation.
- ride/[id] GET returns status/service/nullable driver; PATCH handles rider
  cancel + driver en_route/completed. ride/list backs the history tabs.

Rider flow (best experience):
- confirm-ride is now a request screen: single trip fare + nearest-driver
  ETA + cash/card + Request Ride -> live status. Periodically polls online
  drivers of the selected service and disables Request when none are
  online (prevents the "stuck searching forever" state).
- book-ride is the live ride-status screen (searching -> accepted ->
  en_route -> completed/cancelled + Cancel), polling every 3s.
- lib/request-ride unifies the Areeba card flow + cash path.
- Map reads /driver/nearby (real positions, service-filtered); lib/map
  adds calculateTripFare + service-aware fares.

POI suggestions:
- lib/places (Google Nearby Search) + nearby-suggestions chips for
  mall/hospital/pharmacy/restaurant on the home screen.

Service categories now drive both matching and a per-service fare
multiplier (car 1.0 / moto 0.7 / courier 0.85 / chauffeur 1.5).

Map tiles: react-native-maps rendered blank on Android because no Google
Maps key was set. Switched app.json -> app.config.js so
android.config.googleMaps.apiKey is injected from
EXPO_PUBLIC_GOOGLE_API_KEY at build time (keeps the key out of git).
Requires a native rebuild (expo run:android) to take effect.

Also includes the prior payment/auth hardening (server-authoritative
payment_orders ledger with double-spend guards, peppered OTP, register
TOCTOU fix, stats cents fix) that was left uncommitted.

Co-Authored-By: Claude <noreply@anthropic.com>

app/(api)/(areeba)/verify+api.ts

@@ -1,35 +1,69 @@
+import { requireAuth } from "@/lib/jwt";
 import { retrieveOrder } from "@/lib/areeba";
+import { getOrder, markPaid } from "@/lib/payment-orders";
 
 export async function POST(req: Request) {
-  const body = await req.json();
-  const { orderId, resultIndicator, successIndicator } = body;
+  const auth = requireAuth(req);
+  if ("error" in auth) return auth.error;
 
-  if (!orderId)
-    return new Response(JSON.stringify({ error: "Missing order id." }), {
-      status: 400,
-    });
+  const body = await req.json().catch(() => ({}));
+  const { orderId, resultIndicator } = body;
+
+  if (!orderId || !resultIndicator)
+    return Response.json(
+      { error: "Missing order id or result indicator." },
+      { status: 400 },
+    );
 
   try {
-    const order = await retrieveOrder(orderId);
+    // Look the order up server-side — never trust a client-supplied
+    // successIndicator value, only the one we persisted at creation time.
+    const order = await getOrder(orderId);
+    if (!order)
+      return Response.json({ error: "Order not found." }, { status: 404 });
 
-    // The gateway appends resultIndicator to the return URL after payment;
-    // it must match the successIndicator issued when the session was created.
-    const indicatorMatches =
-      !successIndicator || resultIndicator === successIndicator;
+    if (order.user_id !== auth.userId)
+      return Response.json({ error: "Unauthorized." }, { status: 403 });
 
-    return new Response(
-      JSON.stringify({
-        success: order.paid && indicatorMatches,
-        status: order.status,
-        amount: order.amount,
-        currency: order.currency,
-      }),
-    );
+    // An order can only be verified once. A 'paid' or 'consumed' order has
+    // already settled — rejecting here is the primary double-spend defense: it
+    // stops a client from re-verifying an order it already used for a ride.
+    if (order.status !== "pending")
+      return Response.json(
+        { error: "This payment order is no longer pending." },
+        { status: 400 },
+      );
+
+    if (
+      !order.success_indicator ||
+      order.success_indicator !== resultIndicator
+    )
+      return Response.json(
+        { error: "Payment verification failed." },
+        { status: 400 },
+      );
+
+    const retrieved = await retrieveOrder(orderId);
+
+    if (!retrieved.paid)
+      return Response.json({ error: "Payment not captured." }, { status: 400 });
+
+    // Reconcile the gateway's amount/currency against what we stored, so a
+    // tampered or partial payment cannot mark a full-fare order paid.
+    const gatewayCents = Math.round(Number(retrieved.amount) * 100);
+    const gatewayCurrency = retrieved.currency ?? "USD";
+    if (gatewayCents !== order.amount_cents || gatewayCurrency !== order.currency)
+      return Response.json(
+        { error: "Payment amount mismatch." },
+        { status: 400 },
+      );
+
+    await markPaid(orderId);
+
+    return Response.json({ success: true, orderId });
   } catch (err) {
     console.log("[AREEBA_PAYMENT_VERIFY]: ", err);
 
-    return new Response(JSON.stringify({ error: "Internal Server Error" }), {
-      status: 500,
-    });
+    return Response.json({ error: "Internal Server Error" }, { status: 500 });
   }
-}
+}