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-paper/lib/module/utils/BackHandler/BackHandler.js

@@ -0,0 +1,11 @@
+function emptyFunction() {}
+export const BackHandler = {
+  exitApp: emptyFunction,
+  addEventListener() {
+    return {
+      remove: emptyFunction
+    };
+  },
+  removeEventListener: emptyFunction
+};
+//# sourceMappingURL=BackHandler.js.map

smart-app-city/frontend/node_modules/react-native-paper/lib/module/utils/BackHandler/BackHandler.js.map

@@ -0,0 +1 @@
+{"version":3,"names":["emptyFunction","BackHandler","exitApp","addEventListener","remove","removeEventListener"],"sourceRoot":"../../../../src","sources":["utils/BackHandler/BackHandler.tsx"],"mappings":"AAAA,SAASA,aAAaA,CAAA,EAAG,CAAC;AAE1B,OAAO,MAAMC,WAAW,GAAG;EACzBC,OAAO,EAAEF,aAAa;EACtBG,gBAAgBA,CAAA,EAA2B;IACzC,OAAO;MACLC,MAAM,EAAEJ;IACV,CAAC;EACH,CAAC;EACDK,mBAAmB,EAAEL;AACvB,CAAC","ignoreList":[]}

smart-app-city/frontend/node_modules/react-native-paper/lib/module/utils/BackHandler/BackHandler.native.js

@@ -0,0 +1,3 @@
+import { BackHandler } from 'react-native';
+export { BackHandler };
+//# sourceMappingURL=BackHandler.native.js.map

smart-app-city/frontend/node_modules/react-native-paper/lib/module/utils/BackHandler/BackHandler.native.js.map

@@ -0,0 +1 @@
+{"version":3,"names":["BackHandler"],"sourceRoot":"../../../../src","sources":["utils/BackHandler/BackHandler.native.tsx"],"mappings":"AAAA,SAASA,WAAW,QAAQ,cAAc;AAE1C,SAASA,WAAW","ignoreList":[]}