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/for-each/README.md

@@ -0,0 +1,39 @@
+# for-each [![build status][1]][2]
+
+[![browser support][3]][4]
+
+A better forEach.
+
+## Example
+
+Like `Array.prototype.forEach` but works on objects.
+
+```js
+var forEach = require("for-each")
+
+forEach({ key: "value" }, function (value, key, object) {
+    /* code */
+})
+```
+
+As a bonus, it's also a perfectly function shim/polyfill for arrays too!
+
+```js
+var forEach = require("for-each")
+
+forEach([1, 2, 3], function (value, index, array) {
+    /* code */
+})
+```
+
+## Installation
+
+`npm install for-each`
+
+## MIT Licenced
+
+  [1]: https://secure.travis-ci.org/Raynos/for-each.png
+  [2]: http://travis-ci.org/Raynos/for-each
+  [3]: https://ci.testling.com/Raynos/for-each.png
+  [4]: https://ci.testling.com/Raynos/for-each
+