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

app/(root)/confirm-ride.tsx

@@ -1,5 +1,5 @@
 import { router } from "expo-router";
-import { FlatList, View } from "react-native";
+import { FlatList, Text, View } from "react-native";
 
 import { CustomButton } from "@/components/custom-button";
 import { DriverCard } from "@/components/driver-card";
@@ -20,11 +20,19 @@ const ConfirmRide = () => {
             setSelected={() => setSelectedDriver(item.id)}
           />
         )}
+        ListEmptyComponent={() => (
+          <Text className="text-center text-general-200 font-JakartaMedium mt-10">
+            No drivers available on this route right now.{"\n"}Please try
+            another destination.
+          </Text>
+        )}
         ListFooterComponent={() => (
           <View className="mx-5 mt-10">
             <CustomButton
               title="Select Ride"
               onPress={() => router.push("/(root)/book-ride")}
+              disabled={selectedDriver === null}
+              className={selectedDriver === null ? "opacity-50" : ""}
             />
           </View>
         )}