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/preParsePostFormat/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/preParsePostFormat/index.js

@@ -0,0 +1,40 @@
+// Plugin template from https://day.js.org/docs/en/plugin/plugin
+export default (function (option, dayjsClass) {
+  var oldParse = dayjsClass.prototype.parse;
+
+  dayjsClass.prototype.parse = function (cfg) {
+    if (typeof cfg.date === 'string') {
+      var locale = this.$locale();
+      cfg.date = locale && locale.preparse ? locale.preparse(cfg.date) : cfg.date;
+    } // original parse result
+
+
+    return oldParse.bind(this)(cfg);
+  }; // // overriding existing API
+  // // e.g. extend dayjs().format()
+
+
+  var oldFormat = dayjsClass.prototype.format;
+
+  dayjsClass.prototype.format = function () {
+    for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
+      args[_key] = arguments[_key];
+    }
+
+    // original format result
+    var result = oldFormat.call.apply(oldFormat, [this].concat(args)); // return modified result
+
+    var locale = this.$locale();
+    return locale && locale.postformat ? locale.postformat(result) : result;
+  };
+
+  var oldFromTo = dayjsClass.prototype.fromToBase;
+
+  if (oldFromTo) {
+    dayjsClass.prototype.fromToBase = function (input, withoutSuffix, instance, isFrom) {
+      var locale = this.$locale() || instance.$locale(); // original format result
+
+      return oldFromTo.call(this, input, withoutSuffix, instance, isFrom, locale && locale.postformat);
+    };
+  }
+});