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/xmlbuilder/perf/basic/object.coffee

@@ -0,0 +1,21 @@
+perf 'Create simple object', 100000, (run) ->
+  obj =
+    ele: "simple element"
+    person:
+      name: "John"
+      '@age': 35
+      '?pi': 'mypi'
+      '#comment': 'Good guy'
+      '#cdata': 'well formed!'
+      unescaped:
+        '#raw': '&<>&'
+      address:
+        city: "Istanbul"
+        street: "End of long and winding road"
+      contact:
+        phone: [ "555-1234", "555-1235" ]
+      id: () -> return 42
+      details:
+        '#text': 'classified'
+
+  run () -> xml(obj)