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/tsconfig.base.json

@@ -0,0 +1,18 @@
+{
+  "$schema": "https://json.schemastore.org/tsconfig",
+  "display": "Expo",
+
+  "compilerOptions": {
+    "allowJs": true,
+    "esModuleInterop": true,
+    "jsx": "react-native",
+    "lib": ["DOM", "ESNext"],
+    "moduleResolution": "node",
+    "noEmit": true,
+    "resolveJsonModule": true,
+    "skipLibCheck": true,
+    "target": "ESNext"
+  },
+
+  "exclude": ["node_modules", "babel.config.js", "metro.config.js", "jest.config.js"]
+}