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/lib/XMLDOMStringList.js

@@ -0,0 +1,44 @@
+// Generated by CoffeeScript 2.4.1
+(function() {
+  // Represents a list of string entries
+  var XMLDOMStringList;
+
+  module.exports = XMLDOMStringList = (function() {
+    class XMLDOMStringList {
+      // Initializes a new instance of `XMLDOMStringList`
+      // This is just a wrapper around an ordinary
+      // JS array.
+
+      // `arr` the array of string values
+      constructor(arr) {
+        this.arr = arr || [];
+      }
+
+      // Returns the indexth item in the collection.
+
+      // `index` index into the collection
+      item(index) {
+        return this.arr[index] || null;
+      }
+
+      // Test if a string is part of this DOMStringList.
+
+      // `str` the string to look for
+      contains(str) {
+        return this.arr.indexOf(str) !== -1;
+      }
+
+    };
+
+    // Returns the number of strings in the list.
+    Object.defineProperty(XMLDOMStringList.prototype, 'length', {
+      get: function() {
+        return this.arr.length;
+      }
+    });
+
+    return XMLDOMStringList;
+
+  }).call(this);
+
+}).call(this);