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/babel-plugin-react-native-web/README.md

@@ -0,0 +1,52 @@
+# babel-plugin-react-native-web
+
+[![npm version][package-badge]][package-url] [![PRs Welcome](https://img.shields.io/badge/PRs-welcome-brightgreen.svg)](https://reactjs.org/docs/how-to-contribute.html#your-first-pull-request)
+
+A Babel plugin that will alias `react-native` to `react-native-web` and exclude
+any modules not required by your app (keeping bundle size down).
+
+## Installation
+
+```
+npm install --save-dev babel-plugin-react-native-web
+```
+
+## Usage
+
+**.babelrc**
+
+```
+{
+  "plugins": [
+    ["react-native-web", { commonjs: true }]
+  ]
+}
+```
+
+You should configure the plugin to match the module format used by your
+bundler. Most modern bundlers will use a package's ES modules by default (i.e.,
+if `package.json` has a `module` field). But if you need the plugin to rewrite
+import paths to point to CommonJS modules, you must set the `commonjs` option
+to `true`.
+
+## Example
+
+NOTE: `react-native-web` internal paths are _not stable_ and you must not rely
+on them. Always use the Babel plugin to optimize your build. What follows is an
+example of the rewrite performed by the plugin.
+
+**Before**
+
+```js
+import { StyleSheet, View } from 'react-native';
+```
+
+**After**
+
+```js
+import StyleSheet from 'react-native-web/dist/exports/StyleSheet';
+import View from 'react-native-web/dist/exports/View';
+```
+
+[package-badge]: https://img.shields.io/npm/v/babel-plugin-react-native-web.svg?style=flat
+[package-url]: https://www.npmjs.com/package/babel-plugin-react-native-web