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/bottom-tabs/src/navigators/createBottomTabNavigator.tsx

@@ -0,0 +1,134 @@
+import {
+  createNavigatorFactory,
+  DefaultNavigatorOptions,
+  ParamListBase,
+  TabActionHelpers,
+  TabNavigationState,
+  TabRouter,
+  TabRouterOptions,
+  useNavigationBuilder,
+} from '@react-navigation/native';
+import * as React from 'react';
+import warnOnce from 'warn-once';
+
+import type {
+  BottomTabNavigationConfig,
+  BottomTabNavigationEventMap,
+  BottomTabNavigationOptions,
+} from '../types';
+import BottomTabView from '../views/BottomTabView';
+
+type Props = DefaultNavigatorOptions<
+  ParamListBase,
+  TabNavigationState<ParamListBase>,
+  BottomTabNavigationOptions,
+  BottomTabNavigationEventMap
+> &
+  TabRouterOptions &
+  BottomTabNavigationConfig;
+
+function BottomTabNavigator({
+  id,
+  initialRouteName,
+  backBehavior,
+  children,
+  screenListeners,
+  screenOptions,
+  sceneContainerStyle,
+  ...restWithDeprecated
+}: Props) {
+  const {
+    // @ts-expect-error: lazy is deprecated
+    lazy,
+    // @ts-expect-error: tabBarOptions is deprecated
+    tabBarOptions,
+    ...rest
+  } = restWithDeprecated;
+
+  let defaultScreenOptions: BottomTabNavigationOptions = {};
+
+  if (tabBarOptions) {
+    Object.assign(defaultScreenOptions, {
+      tabBarHideOnKeyboard: tabBarOptions.keyboardHidesTabBar,
+      tabBarActiveTintColor: tabBarOptions.activeTintColor,
+      tabBarInactiveTintColor: tabBarOptions.inactiveTintColor,
+      tabBarActiveBackgroundColor: tabBarOptions.activeBackgroundColor,
+      tabBarInactiveBackgroundColor: tabBarOptions.inactiveBackgroundColor,
+      tabBarAllowFontScaling: tabBarOptions.allowFontScaling,
+      tabBarShowLabel: tabBarOptions.showLabel,
+      tabBarLabelStyle: tabBarOptions.labelStyle,
+      tabBarIconStyle: tabBarOptions.iconStyle,
+      tabBarItemStyle: tabBarOptions.tabStyle,
+      tabBarLabelPosition:
+        tabBarOptions.labelPosition ??
+        (tabBarOptions.adaptive === false ? 'below-icon' : undefined),
+      tabBarStyle: [
+        { display: tabBarOptions.tabBarVisible ? 'none' : 'flex' },
+        defaultScreenOptions.tabBarStyle,
+      ],
+    });
+
+    (
+      Object.keys(defaultScreenOptions) as (keyof BottomTabNavigationOptions)[]
+    ).forEach((key) => {
+      if (defaultScreenOptions[key] === undefined) {
+        // eslint-disable-next-line @typescript-eslint/no-dynamic-delete
+        delete defaultScreenOptions[key];
+      }
+    });
+
+    warnOnce(
+      tabBarOptions,
+      `Bottom Tab Navigator: 'tabBarOptions' is deprecated. Migrate the options to 'screenOptions' instead.\n\nPlace the following in 'screenOptions' in your code to keep current behavior:\n\n${JSON.stringify(
+        defaultScreenOptions,
+        null,
+        2
+      )}\n\nSee https://reactnavigation.org/docs/bottom-tab-navigator#options for more details.`
+    );
+  }
+
+  if (typeof lazy === 'boolean') {
+    defaultScreenOptions.lazy = lazy;
+
+    warnOnce(
+      true,
+      `Bottom Tab Navigator: 'lazy' in props is deprecated. Move it to 'screenOptions' instead.\n\nSee https://reactnavigation.org/docs/bottom-tab-navigator/#lazy for more details.`
+    );
+  }
+
+  const { state, descriptors, navigation, NavigationContent } =
+    useNavigationBuilder<
+      TabNavigationState<ParamListBase>,
+      TabRouterOptions,
+      TabActionHelpers<ParamListBase>,
+      BottomTabNavigationOptions,
+      BottomTabNavigationEventMap
+    >(TabRouter, {
+      id,
+      initialRouteName,
+      backBehavior,
+      children,
+      screenListeners,
+      screenOptions,
+      defaultScreenOptions,
+    });
+
+  return (
+    <NavigationContent>
+      <BottomTabView
+        {...rest}
+        state={state}
+        navigation={navigation}
+        descriptors={descriptors}
+        sceneContainerStyle={sceneContainerStyle}
+      />
+    </NavigationContent>
+  );
+}
+
+export default createNavigatorFactory<
+  TabNavigationState<ParamListBase>,
+  BottomTabNavigationOptions,
+  BottomTabNavigationEventMap,
+  typeof BottomTabNavigator
+>(BottomTabNavigator);