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/expo-camera/build/web/WebConstants.js

@@ -0,0 +1,27 @@
+import { CameraType, ImageType } from '../legacy/Camera.types';
+// https://developer.mozilla.org/en-US/docs/Web/API/MediaTrackConstraints/aspectRatio
+export const VIDEO_ASPECT_RATIOS = {
+    '3840x2160': 3840 / 2160,
+    '1920x1080': 1920 / 1080,
+    '1280x720': 1280 / 720,
+    '640x480': 640 / 480,
+    '352x288': 352 / 288,
+};
+export const PictureSizes = Object.keys(VIDEO_ASPECT_RATIOS);
+export const ImageTypeFormat = {
+    [ImageType.jpg]: 'image/jpeg',
+    [ImageType.png]: 'image/png',
+};
+export const MinimumConstraints = {
+    audio: false,
+    video: true,
+};
+export const CameraTypeToFacingMode = {
+    [CameraType.front]: 'user',
+    [CameraType.back]: 'environment',
+};
+export const FacingModeToCameraType = {
+    user: CameraType.front,
+    environment: CameraType.back,
+};
+//# sourceMappingURL=WebConstants.js.map