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/dayjs/esm/locale/kn.js

@@ -0,0 +1,38 @@
+// Kannada [kn]
+import dayjs from '../index';
+var locale = {
+  name: 'kn',
+  weekdays: 'ಭಾನುವಾರ_ಸೋಮವಾರ_ಮಂಗಳವಾರ_ಬುಧವಾರ_ಗುರುವಾರ_ಶುಕ್ರವಾರ_ಶನಿವಾರ'.split('_'),
+  months: 'ಜನವರಿ_ಫೆಬ್ರವರಿ_ಮಾರ್ಚ್_ಏಪ್ರಿಲ್_ಮೇ_ಜೂನ್_ಜುಲೈ_ಆಗಸ್ಟ್_ಸೆಪ್ಟೆಂಬರ್_ಅಕ್ಟೋಬರ್_ನವೆಂಬರ್_ಡಿಸೆಂಬರ್'.split('_'),
+  weekdaysShort: 'ಭಾನು_ಸೋಮ_ಮಂಗಳ_ಬುಧ_ಗುರು_ಶುಕ್ರ_ಶನಿ'.split('_'),
+  monthsShort: 'ಜನ_ಫೆಬ್ರ_ಮಾರ್ಚ್_ಏಪ್ರಿಲ್_ಮೇ_ಜೂನ್_ಜುಲೈ_ಆಗಸ್ಟ್_ಸೆಪ್ಟೆಂ_ಅಕ್ಟೋ_ನವೆಂ_ಡಿಸೆಂ'.split('_'),
+  weekdaysMin: 'ಭಾ_ಸೋ_ಮಂ_ಬು_ಗು_ಶು_ಶ'.split('_'),
+  ordinal: function ordinal(n) {
+    return n;
+  },
+  formats: {
+    LT: 'A h:mm',
+    LTS: 'A h:mm:ss',
+    L: 'DD/MM/YYYY',
+    LL: 'D MMMM YYYY',
+    LLL: 'D MMMM YYYY, A h:mm',
+    LLLL: 'dddd, D MMMM YYYY, A h:mm'
+  },
+  relativeTime: {
+    future: '%s ನಂತರ',
+    past: '%s ಹಿಂದೆ',
+    s: 'ಕೆಲವು ಕ್ಷಣಗಳು',
+    m: 'ಒಂದು ನಿಮಿಷ',
+    mm: '%d ನಿಮಿಷ',
+    h: 'ಒಂದು ಗಂಟೆ',
+    hh: '%d ಗಂಟೆ',
+    d: 'ಒಂದು ದಿನ',
+    dd: '%d ದಿನ',
+    M: 'ಒಂದು ತಿಂಗಳು',
+    MM: '%d ತಿಂಗಳು',
+    y: 'ಒಂದು ವರ್ಷ',
+    yy: '%d ವರ್ಷ'
+  }
+};
+dayjs.locale(locale, null, true);
+export default locale;