feat: implement Stripe checkout flow, update profile settings UI for subscriptions, and add agent profile editing.

lib/config/firebase_config.dart

@@ -0,0 +1,48 @@
+import 'package:firebase_core/firebase_core.dart';
+import 'package:real_estate_mobile/config/app_config.dart';
+
+class FirebaseConfig {
+  static FirebaseOptions get currentOptions {
+    switch (AppConfig.flavor) {
+      case Flavor.dev:
+        return _dev;
+      case Flavor.demo:
+        return _demo;
+      case Flavor.local:
+        return _local;
+    }
+  }
+
+  // ── Dev ──
+  static const _dev = FirebaseOptions(
+    apiKey: 'AIzaSyAwb_9fc7n9gbN_IQqWeYRkHSSykzVHCyc', // Android
+    appId: '1:703616926518:android:4342b796fbabb690fca997',
+    messagingSenderId: '703616926518',
+    projectId: 'real-estate-2d71e',
+    storageBucket: 'real-estate-2d71e.firebasestorage.app',
+    iosBundleId: 'com.requestn.realEstateMobile.dev',
+    iosClientId: null,
+  );
+
+  // ── Demo ──
+  static const _demo = FirebaseOptions(
+    apiKey: 'AIzaSyAwb_9fc7n9gbN_IQqWeYRkHSSykzVHCyc',
+    appId: '1:703616926518:android:270639d6887d2cb4fca997',
+    messagingSenderId: '703616926518',
+    projectId: 'real-estate-2d71e',
+    storageBucket: 'real-estate-2d71e.firebasestorage.app',
+    iosBundleId: 'com.requestn.realEstateMobile.demo',
+    iosClientId: null,
+  );
+
+  // ── Local ──
+  static const _local = FirebaseOptions(
+    apiKey: 'AIzaSyAwb_9fc7n9gbN_IQqWeYRkHSSykzVHCyc',
+    appId: '1:703616926518:android:2eb242f07b174c25fca997',
+    messagingSenderId: '703616926518',
+    projectId: 'real-estate-2d71e',
+    storageBucket: 'real-estate-2d71e.firebasestorage.app',
+    iosBundleId: 'com.requestn.realEstateMobile.local',
+    iosClientId: null,
+  );
+}