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/src/private/featureflags/NativeReactNativeFeatureFlags.js

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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.
+ *
+ * @generated SignedSource<<8509d5ee87efb5aa8da7efcd2085d0a2>>
+ * @flow strict-local
+ */
+
+/**
+ * IMPORTANT: Do NOT modify this file directly.
+ *
+ * To change the definition of the flags, edit
+ *   packages/react-native/scripts/featureflags/ReactNativeFeatureFlags.config.js.
+ *
+ * To regenerate this code, run the following script from the repo root:
+ *   yarn featureflags-update
+ */
+
+import type {TurboModule} from '../../../Libraries/TurboModule/RCTExport';
+
+import * as TurboModuleRegistry from '../../../Libraries/TurboModule/TurboModuleRegistry';
+
+export interface Spec extends TurboModule {
+  +commonTestFlag?: () => boolean;
+  +enableBackgroundExecutor?: () => boolean;
+  +useModernRuntimeScheduler?: () => boolean;
+  +enableMicrotasks?: () => boolean;
+  +batchRenderingUpdatesInEventLoop?: () => boolean;
+  +enableSpannableBuildingUnification?: () => boolean;
+  +enableCustomDrawOrderFabric?: () => boolean;
+  +enableFixForClippedSubviewsCrash?: () => boolean;
+  +inspectorEnableCxxInspectorPackagerConnection?: () => boolean;
+  +inspectorEnableModernCDPRegistry?: () => boolean;
+}
+
+const NativeReactNativeFeatureFlags: ?Spec = TurboModuleRegistry.get<Spec>(
+  'NativeReactNativeFeatureFlagsCxx',
+);
+
+export default NativeReactNativeFeatureFlags;

smart-app-city/frontend/node_modules/react-native/src/private/featureflags/ReactNativeFeatureFlags.js

@@ -0,0 +1,140 @@
+/**
+ * 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.
+ *
+ * @generated SignedSource<<7c83d5613c3be517efe48378e6356e79>>
+ * @flow strict-local
+ */
+
+/**
+ * IMPORTANT: Do NOT modify this file directly.
+ *
+ * To change the definition of the flags, edit
+ *   packages/react-native/scripts/featureflags/ReactNativeFeatureFlags.config.js.
+ *
+ * To regenerate this code, run the following script from the repo root:
+ *   yarn featureflags-update
+ */
+
+import {
+  type Getter,
+  createJavaScriptFlagGetter,
+  createNativeFlagGetter,
+  setOverrides,
+} from './ReactNativeFeatureFlagsBase';
+
+export type ReactNativeFeatureFlagsJsOnly = {
+  jsOnlyTestFlag: Getter<boolean>,
+  isLayoutAnimationEnabled: Getter<boolean>,
+  animatedShouldDebounceQueueFlush: Getter<boolean>,
+  animatedShouldUseSingleOp: Getter<boolean>,
+  enableAccessToHostTreeInFabric: Getter<boolean>,
+  shouldUseAnimatedObjectForTransform: Getter<boolean>,
+  shouldUseSetNativePropsInFabric: Getter<boolean>,
+  shouldUseRemoveClippedSubviewsAsDefaultOnIOS: Getter<boolean>,
+};
+
+export type ReactNativeFeatureFlagsJsOnlyOverrides = Partial<ReactNativeFeatureFlagsJsOnly>;
+
+export type ReactNativeFeatureFlags = {
+  ...ReactNativeFeatureFlagsJsOnly,
+  commonTestFlag: Getter<boolean>,
+  enableBackgroundExecutor: Getter<boolean>,
+  useModernRuntimeScheduler: Getter<boolean>,
+  enableMicrotasks: Getter<boolean>,
+  batchRenderingUpdatesInEventLoop: Getter<boolean>,
+  enableSpannableBuildingUnification: Getter<boolean>,
+  enableCustomDrawOrderFabric: Getter<boolean>,
+  enableFixForClippedSubviewsCrash: Getter<boolean>,
+  inspectorEnableCxxInspectorPackagerConnection: Getter<boolean>,
+  inspectorEnableModernCDPRegistry: Getter<boolean>,
+}
+
+/**
+ * JS-only flag for testing. Do NOT modify.
+ */
+export const jsOnlyTestFlag: Getter<boolean> = createJavaScriptFlagGetter('jsOnlyTestFlag', false);
+
+/**
+ * Function used to enable / disabled Layout Animations in React Native.
+ */
+export const isLayoutAnimationEnabled: Getter<boolean> = createJavaScriptFlagGetter('isLayoutAnimationEnabled', true);
+
+/**
+ * Enables an experimental flush-queue debouncing in Animated.js.
+ */
+export const animatedShouldDebounceQueueFlush: Getter<boolean> = createJavaScriptFlagGetter('animatedShouldDebounceQueueFlush', false);
+
+/**
+ * Enables an experimental mega-operation for Animated.js that replaces many calls to native with a single call into native, to reduce JSI/JNI traffic.
+ */
+export const animatedShouldUseSingleOp: Getter<boolean> = createJavaScriptFlagGetter('animatedShouldUseSingleOp', false);
+
+/**
+ * Enables access to the host tree in Fabric using DOM-compatible APIs.
+ */
+export const enableAccessToHostTreeInFabric: Getter<boolean> = createJavaScriptFlagGetter('enableAccessToHostTreeInFabric', false);
+
+/**
+ * Enables use of AnimatedObject for animating transform values.
+ */
+export const shouldUseAnimatedObjectForTransform: Getter<boolean> = createJavaScriptFlagGetter('shouldUseAnimatedObjectForTransform', false);
+
+/**
+ * Enables use of setNativeProps in JS driven animations.
+ */
+export const shouldUseSetNativePropsInFabric: Getter<boolean> = createJavaScriptFlagGetter('shouldUseSetNativePropsInFabric', true);
+
+/**
+ * removeClippedSubviews prop will be used as the default in FlatList on iOS to match Android
+ */
+export const shouldUseRemoveClippedSubviewsAsDefaultOnIOS: Getter<boolean> = createJavaScriptFlagGetter('shouldUseRemoveClippedSubviewsAsDefaultOnIOS', false);
+
+/**
+ * Common flag for testing. Do NOT modify.
+ */
+export const commonTestFlag: Getter<boolean> = createNativeFlagGetter('commonTestFlag', false);
+/**
+ * Enables the use of a background executor to compute layout and commit updates on Fabric (this system is deprecated and should not be used).
+ */
+export const enableBackgroundExecutor: Getter<boolean> = createNativeFlagGetter('enableBackgroundExecutor', false);
+/**
+ * When enabled, it uses the modern fork of RuntimeScheduler that allows scheduling tasks with priorities from any thread.
+ */
+export const useModernRuntimeScheduler: Getter<boolean> = createNativeFlagGetter('useModernRuntimeScheduler', false);
+/**
+ * Enables the use of microtasks in Hermes (scheduling) and RuntimeScheduler (execution).
+ */
+export const enableMicrotasks: Getter<boolean> = createNativeFlagGetter('enableMicrotasks', false);
+/**
+ * When enabled, the RuntimeScheduler processing the event loop will batch all rendering updates and dispatch them together at the end of each iteration of the loop.
+ */
+export const batchRenderingUpdatesInEventLoop: Getter<boolean> = createNativeFlagGetter('batchRenderingUpdatesInEventLoop', false);
+/**
+ * Uses new, deduplicated logic for constructing Android Spannables from text fragments
+ */
+export const enableSpannableBuildingUnification: Getter<boolean> = createNativeFlagGetter('enableSpannableBuildingUnification', false);
+/**
+ * When enabled, Fabric will use customDrawOrder in ReactViewGroup (similar to old architecture).
+ */
+export const enableCustomDrawOrderFabric: Getter<boolean> = createNativeFlagGetter('enableCustomDrawOrderFabric', false);
+/**
+ * Attempt at fixing a crash related to subview clipping on Android. This is a kill switch for the fix
+ */
+export const enableFixForClippedSubviewsCrash: Getter<boolean> = createNativeFlagGetter('enableFixForClippedSubviewsCrash', false);
+/**
+ * Flag determining if the C++ implementation of InspectorPackagerConnection should be used instead of the per-platform one. This flag is global and should not be changed across React Host lifetimes.
+ */
+export const inspectorEnableCxxInspectorPackagerConnection: Getter<boolean> = createNativeFlagGetter('inspectorEnableCxxInspectorPackagerConnection', false);
+/**
+ * Flag determining if the modern CDP backend should be enabled. This flag is global and should not be changed across React Host lifetimes.
+ */
+export const inspectorEnableModernCDPRegistry: Getter<boolean> = createNativeFlagGetter('inspectorEnableModernCDPRegistry', false);
+
+/**
+ * Overrides the feature flags with the provided methods.
+ * NOTE: Only JS-only flags can be overridden from JavaScript using this API.
+ */
+export const override = setOverrides;

smart-app-city/frontend/node_modules/react-native/src/private/featureflags/ReactNativeFeatureFlagsBase.js

@@ -0,0 +1,84 @@
+/**
+ * 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.
+ *
+ * @flow strict-local
+ * @format
+ */
+
+import type {
+  ReactNativeFeatureFlagsJsOnly,
+  ReactNativeFeatureFlagsJsOnlyOverrides,
+} from './ReactNativeFeatureFlags';
+
+import NativeReactNativeFeatureFlags from './NativeReactNativeFeatureFlags';
+
+const accessedFeatureFlags: Set<string> = new Set();
+let overrides: ?ReactNativeFeatureFlagsJsOnlyOverrides;
+
+export type Getter<T> = () => T;
+
+function createGetter<T: boolean | number | string>(
+  configName: string,
+  customValueGetter: Getter<?T>,
+  defaultValue: T,
+): Getter<T> {
+  let cachedValue: ?T;
+
+  return () => {
+    if (cachedValue == null) {
+      accessedFeatureFlags.add(configName);
+      cachedValue = customValueGetter() ?? defaultValue;
+    }
+    return cachedValue;
+  };
+}
+
+export function createJavaScriptFlagGetter<
+  K: $Keys<ReactNativeFeatureFlagsJsOnly>,
+>(
+  configName: K,
+  defaultValue: ReturnType<ReactNativeFeatureFlagsJsOnly[K]>,
+): Getter<ReturnType<ReactNativeFeatureFlagsJsOnly[K]>> {
+  return createGetter(
+    configName,
+    () => overrides?.[configName]?.(),
+    defaultValue,
+  );
+}
+
+type NativeFeatureFlags = $NonMaybeType<typeof NativeReactNativeFeatureFlags>;
+
+export function createNativeFlagGetter<K: $Keys<NativeFeatureFlags>>(
+  configName: K,
+  defaultValue: ReturnType<$NonMaybeType<NativeFeatureFlags[K]>>,
+): Getter<ReturnType<$NonMaybeType<NativeFeatureFlags[K]>>> {
+  return createGetter(
+    configName,
+    () => NativeReactNativeFeatureFlags?.[configName]?.(),
+    defaultValue,
+  );
+}
+
+export function getOverrides(): ?ReactNativeFeatureFlagsJsOnlyOverrides {
+  return overrides;
+}
+
+export function setOverrides(
+  newOverrides: ReactNativeFeatureFlagsJsOnlyOverrides,
+): void {
+  if (overrides != null) {
+    throw new Error('Feature flags cannot be overridden more than once');
+  }
+
+  if (accessedFeatureFlags.size > 0) {
+    const accessedFeatureFlagsStr = Array.from(accessedFeatureFlags).join(', ');
+    throw new Error(
+      `Feature flags were accessed before being overridden: ${accessedFeatureFlagsStr}`,
+    );
+  }
+
+  overrides = newOverrides;
+}

smart-app-city/frontend/node_modules/react-native/src/private/featureflags/__tests__/ReactNativeFeatureFlags-test.js

@@ -0,0 +1,92 @@
+/**
+ * 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.
+ *
+ * @flow strict-local
+ * @format
+ * @oncall react_native
+ */
+
+describe('ReactNativeFeatureFlags', () => {
+  beforeEach(() => {
+    jest.resetModules();
+  });
+
+  it('should provide default values for common flags if the native module is NOT available', () => {
+    const ReactNativeFeatureFlags = require('../ReactNativeFeatureFlags');
+    expect(ReactNativeFeatureFlags.commonTestFlag()).toBe(false);
+  });
+
+  it('should access and cache common flags from the native module if it is available', () => {
+    const commonTestFlagFn = jest.fn(() => true);
+
+    jest.doMock('../NativeReactNativeFeatureFlags', () => ({
+      __esModule: true,
+      default: {
+        commonTestFlag: commonTestFlagFn,
+      },
+    }));
+
+    const ReactNativeFeatureFlags = require('../ReactNativeFeatureFlags');
+
+    expect(commonTestFlagFn).toHaveBeenCalledTimes(0);
+
+    expect(ReactNativeFeatureFlags.commonTestFlag()).toBe(true);
+    expect(commonTestFlagFn).toHaveBeenCalledTimes(1);
+
+    expect(ReactNativeFeatureFlags.commonTestFlag()).toBe(true);
+    expect(commonTestFlagFn).toHaveBeenCalledTimes(1);
+  });
+
+  it('should provide default values for JS-only flags', () => {
+    const ReactNativeFeatureFlags = require('../ReactNativeFeatureFlags');
+    expect(ReactNativeFeatureFlags.jsOnlyTestFlag()).toBe(false);
+  });
+
+  it('should access and cache overridden JS-only flags', () => {
+    const ReactNativeFeatureFlags = require('../ReactNativeFeatureFlags');
+
+    const jsOnlyTestFlagFn = jest.fn(() => true);
+    ReactNativeFeatureFlags.override({
+      jsOnlyTestFlag: jsOnlyTestFlagFn,
+    });
+
+    expect(jsOnlyTestFlagFn).toHaveBeenCalledTimes(0);
+
+    expect(ReactNativeFeatureFlags.jsOnlyTestFlag()).toBe(true);
+    expect(jsOnlyTestFlagFn).toHaveBeenCalledTimes(1);
+
+    expect(ReactNativeFeatureFlags.jsOnlyTestFlag()).toBe(true);
+    expect(jsOnlyTestFlagFn).toHaveBeenCalledTimes(1);
+  });
+
+  it('should throw an error if any of the flags has been accessed before overridding', () => {
+    const ReactNativeFeatureFlags = require('../ReactNativeFeatureFlags');
+
+    ReactNativeFeatureFlags.commonTestFlag();
+
+    expect(() =>
+      ReactNativeFeatureFlags.override({
+        jsOnlyTestFlag: () => true,
+      }),
+    ).toThrow(
+      'Feature flags were accessed before being overridden: commonTestFlag',
+    );
+  });
+
+  it('should throw an error when trying to set overrides twice', () => {
+    const ReactNativeFeatureFlags = require('../ReactNativeFeatureFlags');
+
+    ReactNativeFeatureFlags.override({
+      jsOnlyTestFlag: () => true,
+    });
+
+    expect(() =>
+      ReactNativeFeatureFlags.override({
+        jsOnlyTestFlag: () => false,
+      }),
+    ).toThrow('Feature flags cannot be overridden more than once');
+  });
+});