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/Libraries/Image/ImageInjection.js

@@ -0,0 +1,87 @@
+/**
+ * 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
+ */
+
+import type {
+  AbstractImageAndroid,
+  AbstractImageIOS,
+  Image as ImageComponent,
+} from './ImageTypes.flow';
+
+import useMergeRefs from '../Utilities/useMergeRefs';
+import * as React from 'react';
+import {useRef} from 'react';
+
+type ImageComponentDecorator = (AbstractImageAndroid => AbstractImageAndroid) &
+  (AbstractImageIOS => AbstractImageIOS);
+
+let injectedImageComponentDecorator: ?ImageComponentDecorator;
+
+export function unstable_setImageComponentDecorator(
+  imageComponentDecorator: ?ImageComponentDecorator,
+): void {
+  injectedImageComponentDecorator = imageComponentDecorator;
+}
+
+export function unstable_getImageComponentDecorator(): ?ImageComponentDecorator {
+  return injectedImageComponentDecorator;
+}
+
+type ImageInstance = React.ElementRef<ImageComponent>;
+
+type ImageAttachedCallback = (
+  imageInstance: ImageInstance,
+) => void | (() => void);
+
+const imageAttachedCallbacks = new Set<ImageAttachedCallback>();
+
+export function unstable_registerImageAttachedCallback(
+  callback: ImageAttachedCallback,
+): void {
+  imageAttachedCallbacks.add(callback);
+}
+
+export function unstable_unregisterImageAttachedCallback(
+  callback: ImageAttachedCallback,
+): void {
+  imageAttachedCallbacks.delete(callback);
+}
+
+export function useWrapRefWithImageAttachedCallbacks(
+  forwardedRef: React.RefSetter<ImageInstance>,
+): React.RefSetter<ImageInstance> {
+  const pendingCleanupCallbacks = useRef<Array<() => void>>([]);
+
+  const imageAttachedCallbacksRef =
+    useRef<?(node: ImageInstance | null) => void>(null);
+
+  if (imageAttachedCallbacksRef.current == null) {
+    imageAttachedCallbacksRef.current = (node: ImageInstance | null): void => {
+      if (node == null) {
+        if (pendingCleanupCallbacks.current.length > 0) {
+          pendingCleanupCallbacks.current.forEach(cb => cb());
+          pendingCleanupCallbacks.current = [];
+        }
+      } else {
+        imageAttachedCallbacks.forEach(imageAttachedCallback => {
+          const maybeCleanupCallback = imageAttachedCallback(node);
+          if (maybeCleanupCallback != null) {
+            pendingCleanupCallbacks.current.push(maybeCleanupCallback);
+          }
+        });
+      }
+    };
+  }
+
+  // `useMergeRefs` returns a stable ref if its arguments don't change.
+  return useMergeRefs<ImageInstance>(
+    forwardedRef,
+    imageAttachedCallbacksRef.current,
+  );
+}