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/Text/VirtualText/RCTVirtualTextShadowView.h

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+/*
+ * 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.
+ */
+
+#import "RCTBaseTextShadowView.h"
+
+@interface RCTVirtualTextShadowView : RCTBaseTextShadowView
+
+@end

smart-app-city/frontend/node_modules/react-native/Libraries/Text/VirtualText/RCTVirtualTextShadowView.mm

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+/*
+ * 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.
+ */
+
+#import <React/RCTVirtualTextShadowView.h>
+
+#import <React/RCTShadowView+Layout.h>
+#import <yoga/Yoga.h>
+
+#import <React/RCTRawTextShadowView.h>
+
+@implementation RCTVirtualTextShadowView {
+  BOOL _isLayoutDirty;
+}
+
+#pragma mark - Layout
+
+- (void)dirtyLayout
+{
+  [super dirtyLayout];
+
+  if (_isLayoutDirty) {
+    return;
+  }
+  _isLayoutDirty = YES;
+
+  [self.superview dirtyLayout];
+}
+
+- (void)clearLayout
+{
+  _isLayoutDirty = NO;
+}
+
+@end

smart-app-city/frontend/node_modules/react-native/Libraries/Text/VirtualText/RCTVirtualTextView.h

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+/*
+ * 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.
+ */
+
+#import <React/RCTComponent.h>
+
+#import <UIKit/UIKit.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface RCTVirtualTextView : UIView
+
+/**
+ * (Experimental and unused for Paper) Pointer event handlers.
+ */
+@property (nonatomic, assign) RCTBubblingEventBlock onClick;
+
+@end
+
+NS_ASSUME_NONNULL_END

smart-app-city/frontend/node_modules/react-native/Libraries/Text/VirtualText/RCTVirtualTextView.mm

@@ -0,0 +1,12 @@
+/*
+ * 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.
+ */
+
+#import <React/RCTVirtualTextView.h>
+
+@implementation RCTVirtualTextView
+
+@end

smart-app-city/frontend/node_modules/react-native/Libraries/Text/VirtualText/RCTVirtualTextViewManager.h

@@ -0,0 +1,12 @@
+/*
+ * 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.
+ */
+
+#import "RCTBaseTextViewManager.h"
+
+@interface RCTVirtualTextViewManager : RCTBaseTextViewManager
+
+@end

smart-app-city/frontend/node_modules/react-native/Libraries/Text/VirtualText/RCTVirtualTextViewManager.mm

@@ -0,0 +1,26 @@
+/*
+ * 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.
+ */
+
+#import <React/RCTVirtualTextShadowView.h>
+#import <React/RCTVirtualTextView.h>
+#import <React/RCTVirtualTextViewManager.h>
+
+@implementation RCTVirtualTextViewManager
+
+RCT_EXPORT_MODULE(RCTVirtualText)
+
+- (UIView *)view
+{
+  return [RCTVirtualTextView new];
+}
+
+- (RCTShadowView *)shadowView
+{
+  return [RCTVirtualTextShadowView new];
+}
+
+@end