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/babel-preset-expo/build/common.d.ts

@@ -0,0 +1,17 @@
+export declare function hasModule(name: string): boolean;
+/** Determine which bundler is being used. */
+export declare function getBundler(caller?: any): "metro" | "webpack" | null;
+export declare function getPlatform(caller?: any): string | null | undefined;
+export declare function getPossibleProjectRoot(caller?: any): string | null | undefined;
+/** If bundling for a react-server target. */
+export declare function getIsReactServer(caller?: any): boolean;
+export declare function getIsDev(caller?: any): boolean;
+export declare function getIsFastRefreshEnabled(caller?: any): boolean | undefined;
+export declare function getIsProd(caller?: any): boolean;
+export declare function getIsNodeModule(caller?: any): boolean;
+export declare function getBaseUrl(caller?: any): string;
+export declare function getReactCompiler(caller?: any): boolean;
+export declare function getIsServer(caller?: any): boolean;
+export declare function getExpoRouterAbsoluteAppRoot(caller?: any): string;
+export declare function getInlineEnvVarsEnabled(caller?: any): boolean;
+export declare function getAsyncRoutes(caller?: any): boolean;