feat(smart-app): implement complete mobile app MVP

- App.tsx: full navigation (Auth stack + Main tabs with 5 screens)
- Auth: LoginScreen, RegisterScreen, ForgotPasswordScreen
- HomeScreen: dashboard with IoT metrics, weather widget, alerts, quick actions, sensors
- MapScreen: interactive map with layer toggles (6 layers)
- MarketplaceScreen: categories (6), products (5), search
- ChatScreen: AI chat with quick prompts (4), bot responses
- ProfileScreen: user info, stats, menu (9 items), logout
- AlertsScreen: alert list with severity, acknowledge
- SensorsScreen: sensor list with type filters (6 types), search
- ZonesScreen: zone cards with stats
- SettingsScreen: language picker (FR/EN/ES/DE), privacy, about
- Stores: iotStore (sensors, zones, alerts), notificationStore, uiStore + i18n
- Hooks: useSensors, useAlerts, useNotifications, useLocation
- Components: Card, Button, LoadingSpinner, ErrorBoundary, Header
- Services: iotService, notificationService (with axios API client)
- Utils: formatters (temp, AQI, noise, dates), validators (email, password, IBAN)
- Theme: colors.ts with full design system (Blue Ocean palette)
- Ditto: fixed MongoDB connection, new JWT secrets, official gateway image

smart-app-city/frontend/node_modules/react-native-reanimated/android/README.md

@@ -0,0 +1,15 @@
+
+README
+======
+
+If you want to publish the lib as a maven dependency, follow these steps before publishing a new version to npm:
+
+1. Be sure to have the Android [SDK](https://developer.android.com/studio/index.html) and [NDK](https://developer.android.com/ndk/guides/index.html) installed
+2. Be sure to have a `local.properties` file in this folder that points to the Android SDK and NDK
+```
+ndk.dir=/Users/{username}/Library/Android/sdk/ndk-bundle
+sdk.dir=/Users/{username}/Library/Android/sdk
+```
+3. Delete the `maven` folder
+4. Run `sudo ./gradlew installArchives`
+5. Verify that latest set of generated files is in the maven folder with the correct version number