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/plugin/localizedFormat/index.d.ts

@@ -0,0 +1,4 @@
+import { PluginFunc } from 'dayjs/esm'
+
+declare const plugin: PluginFunc
+export = plugin

smart-app-city/frontend/node_modules/dayjs/esm/plugin/localizedFormat/index.js

@@ -0,0 +1,20 @@
+import { FORMAT_DEFAULT } from '../../constant';
+import { u, englishFormats } from './utils';
+export default (function (o, c, d) {
+  var proto = c.prototype;
+  var oldFormat = proto.format;
+  d.en.formats = englishFormats;
+
+  proto.format = function (formatStr) {
+    if (formatStr === void 0) {
+      formatStr = FORMAT_DEFAULT;
+    }
+
+    var _this$$locale = this.$locale(),
+        _this$$locale$formats = _this$$locale.formats,
+        formats = _this$$locale$formats === void 0 ? {} : _this$$locale$formats;
+
+    var result = u(formatStr, formats);
+    return oldFormat.call(this, result);
+  };
+});

smart-app-city/frontend/node_modules/dayjs/esm/plugin/localizedFormat/utils.js

@@ -0,0 +1,20 @@
+// eslint-disable-next-line import/prefer-default-export
+export var t = function t(format) {
+  return format.replace(/(\[[^\]]+])|(MMMM|MM|DD|dddd)/g, function (_, a, b) {
+    return a || b.slice(1);
+  });
+};
+export var englishFormats = {
+  LTS: 'h:mm:ss A',
+  LT: 'h:mm A',
+  L: 'MM/DD/YYYY',
+  LL: 'MMMM D, YYYY',
+  LLL: 'MMMM D, YYYY h:mm A',
+  LLLL: 'dddd, MMMM D, YYYY h:mm A'
+};
+export var u = function u(formatStr, formats) {
+  return formatStr.replace(/(\[[^\]]+])|(LTS?|l{1,4}|L{1,4})/g, function (_, a, b) {
+    var B = b && b.toUpperCase();
+    return a || formats[b] || englishFormats[b] || t(formats[B]);
+  });
+};