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/npm-run-path/readme.md

@@ -0,0 +1,81 @@
+# npm-run-path [![Build Status](https://travis-ci.org/sindresorhus/npm-run-path.svg?branch=master)](https://travis-ci.org/sindresorhus/npm-run-path)
+
+> Get your [PATH](https://en.wikipedia.org/wiki/PATH_(variable)) prepended with locally installed binaries
+
+In [npm run scripts](https://docs.npmjs.com/cli/run-script) you can execute locally installed binaries by name. This enables the same outside npm.
+
+
+## Install
+
+```
+$ npm install --save npm-run-path
+```
+
+
+## Usage
+
+```js
+const childProcess = require('child_process');
+const npmRunPath = require('npm-run-path');
+
+console.log(process.env.PATH);
+//=> '/usr/local/bin'
+
+console.log(npmRunPath());
+//=> '/Users/sindresorhus/dev/foo/node_modules/.bin:/Users/sindresorhus/dev/node_modules/.bin:/Users/sindresorhus/node_modules/.bin:/Users/node_modules/.bin:/node_modules/.bin:/usr/local/bin'
+
+// `foo` is a locally installed binary
+childProcess.execFileSync('foo', {
+	env: npmRunPath.env()
+});
+```
+
+
+## API
+
+### npmRunPath([options])
+
+#### options
+
+##### cwd
+
+Type: `string`<br>
+Default: `process.cwd()`
+
+Working directory.
+
+##### path
+
+Type: `string`<br>
+Default: [`PATH`](https://github.com/sindresorhus/path-key)
+
+PATH to be appended.<br>
+Set it to an empty string to exclude the default PATH.
+
+### npmRunPath.env([options])
+
+#### options
+
+##### cwd
+
+Type: `string`<br>
+Default: `process.cwd()`
+
+Working directory.
+
+##### env
+
+Type: `Object`
+
+Accepts an object of environment variables, like `process.env`, and modifies the PATH using the correct [PATH key](https://github.com/sindresorhus/path-key). Use this if you're modifying the PATH for use in the `child_process` options.
+
+
+## Related
+
+- [npm-run-path-cli](https://github.com/sindresorhus/npm-run-path-cli) - CLI for this module
+- [execa](https://github.com/sindresorhus/execa) - Execute a locally installed binary
+
+
+## License
+
+MIT © [Sindre Sorhus](https://sindresorhus.com)