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/virtualized-lists/Interaction/Batchinator.js

@@ -0,0 +1,76 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @format
+ * @flow strict-local
+ */
+
+'use strict';
+
+const {InteractionManager} = require('react-native');
+
+/**
+ * A simple class for batching up invocations of a low-pri callback. A timeout is set to run the
+ * callback once after a delay, no matter how many times it's scheduled. Once the delay is reached,
+ * InteractionManager.runAfterInteractions is used to invoke the callback after any hi-pri
+ * interactions are done running.
+ *
+ * Make sure to cleanup with dispose().  Example:
+ *
+ *   class Widget extends React.Component {
+ *     _batchedSave: new Batchinator(() => this._saveState, 1000);
+ *     _saveSate() {
+ *       // save this.state to disk
+ *     }
+ *     componentDidUpdate() {
+ *       this._batchedSave.schedule();
+ *     }
+ *     componentWillUnmount() {
+ *       this._batchedSave.dispose();
+ *     }
+ *     ...
+ *   }
+ */
+class Batchinator {
+  _callback: () => void;
+  _delay: number;
+  _taskHandle: ?{cancel: () => void, ...};
+  constructor(callback: () => void, delayMS: number) {
+    this._delay = delayMS;
+    this._callback = callback;
+  }
+  /*
+   * Cleanup any pending tasks.
+   *
+   * By default, if there is a pending task the callback is run immediately. Set the option abort to
+   * true to not call the callback if it was pending.
+   */
+  dispose(options: {abort: boolean, ...} = {abort: false}) {
+    if (this._taskHandle) {
+      this._taskHandle.cancel();
+      if (!options.abort) {
+        this._callback();
+      }
+      this._taskHandle = null;
+    }
+  }
+  schedule() {
+    if (this._taskHandle) {
+      return;
+    }
+    const timeoutHandle = setTimeout(() => {
+      this._taskHandle = InteractionManager.runAfterInteractions(() => {
+        // Note that we clear the handle before invoking the callback so that if the callback calls
+        // schedule again, it will actually schedule another task.
+        this._taskHandle = null;
+        this._callback();
+      });
+    }, this._delay);
+    this._taskHandle = {cancel: () => clearTimeout(timeoutHandle)};
+  }
+}
+
+module.exports = Batchinator;