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/expo-file-system/ios/EXSessionTasks/EXSessionTaskDelegate.h

@@ -0,0 +1,32 @@
+// Copyright 2015-present 650 Industries. All rights reserved.
+
+#import <Foundation/Foundation.h>
+#import <ExpoModulesCore/EXDefines.h>
+
+@interface EXSessionTaskDelegate : NSObject
+
+@property (nonatomic, strong, readonly) EXPromiseResolveBlock resolve;
+@property (nonatomic, strong, readonly) EXPromiseRejectBlock reject;
+
+- (nonnull instancetype)initWithResolve:(EXPromiseResolveBlock)resolve
+                                 reject:(EXPromiseRejectBlock)reject;
+
+- (void)URLSession:(NSURLSession *)session downloadTask:(NSURLSessionDownloadTask *)downloadTask didFinishDownloadingToURL:(NSURL *)location;
+
+- (void)URLSession:(NSURLSession *)session task:(NSURLSessionTask *)task didCompleteWithError:(NSError *)error;
+
+- (void)URLSession:(NSURLSession *)session downloadTask:(NSURLSessionDownloadTask *)downloadTask
+                                           didWriteData:(int64_t)bytesWritten
+                                      totalBytesWritten:(int64_t)totalBytesWritten
+                              totalBytesExpectedToWrite:(int64_t)totalBytesExpectedToWrite;
+
+- (void)URLSession:(NSURLSession *)session dataTask:(NSURLSessionDataTask *)dataTask didReceiveData:(NSData *)data;
+
+- (void)URLSession:(NSURLSession *)session task:(NSURLSessionTask *)task
+                                didSendBodyData:(int64_t)bytesSent
+                                 totalBytesSent:(int64_t)totalBytesSent
+                       totalBytesExpectedToSend:(int64_t)totalBytesExpectedToSend;
+
+- (NSDictionary *)parseServerResponse:(NSURLResponse *)response;
+
+@end