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-navigation/native/lib/module/useLinkTo.js

@@ -0,0 +1,36 @@
+import { getActionFromState, getStateFromPath, NavigationContainerRefContext } from '@react-navigation/core';
+import * as React from 'react';
+import LinkingContext from './LinkingContext';
+export default function useLinkTo() {
+  const navigation = React.useContext(NavigationContainerRefContext);
+  const linking = React.useContext(LinkingContext);
+  const linkTo = React.useCallback(to => {
+    if (navigation === undefined) {
+      throw new Error("Couldn't find a navigation object. Is your component inside NavigationContainer?");
+    }
+    if (typeof to !== 'string') {
+      // @ts-expect-error: This is fine
+      navigation.navigate(to.screen, to.params);
+      return;
+    }
+    if (!to.startsWith('/')) {
+      throw new Error(`The path must start with '/' (${to}).`);
+    }
+    const {
+      options
+    } = linking;
+    const state = options !== null && options !== void 0 && options.getStateFromPath ? options.getStateFromPath(to, options.config) : getStateFromPath(to, options === null || options === void 0 ? void 0 : options.config);
+    if (state) {
+      const action = getActionFromState(state, options === null || options === void 0 ? void 0 : options.config);
+      if (action !== undefined) {
+        navigation.dispatch(action);
+      } else {
+        navigation.reset(state);
+      }
+    } else {
+      throw new Error('Failed to parse the path to a navigation state.');
+    }
+  }, [linking, navigation]);
+  return linkTo;
+}
+//# sourceMappingURL=useLinkTo.js.map