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/XMLText.js

@@ -0,0 +1,82 @@
+// Generated by CoffeeScript 2.4.1
+(function() {
+  var NodeType, XMLCharacterData, XMLText;
+
+  NodeType = require('./NodeType');
+
+  XMLCharacterData = require('./XMLCharacterData');
+
+  // Represents a text node
+  module.exports = XMLText = (function() {
+    class XMLText extends XMLCharacterData {
+      // Initializes a new instance of `XMLText`
+
+      // `text` element text
+      constructor(parent, text) {
+        super(parent);
+        if (text == null) {
+          throw new Error("Missing element text. " + this.debugInfo());
+        }
+        this.name = "#text";
+        this.type = NodeType.Text;
+        this.value = this.stringify.text(text);
+      }
+
+      // Creates and returns a deep clone of `this`
+      clone() {
+        return Object.create(this);
+      }
+
+      // Converts the XML fragment to string
+
+      // `options.pretty` pretty prints the result
+      // `options.indent` indentation for pretty print
+      // `options.offset` how many indentations to add to every line for pretty print
+      // `options.newline` newline sequence for pretty print
+      toString(options) {
+        return this.options.writer.text(this, this.options.writer.filterOptions(options));
+      }
+
+      // DOM level 1 functions to be implemented later
+      splitText(offset) {
+        throw new Error("This DOM method is not implemented." + this.debugInfo());
+      }
+
+      // DOM level 3 functions to be implemented later
+      replaceWholeText(content) {
+        throw new Error("This DOM method is not implemented." + this.debugInfo());
+      }
+
+    };
+
+    // DOM level 3
+    Object.defineProperty(XMLText.prototype, 'isElementContentWhitespace', {
+      get: function() {
+        throw new Error("This DOM method is not implemented." + this.debugInfo());
+      }
+    });
+
+    Object.defineProperty(XMLText.prototype, 'wholeText', {
+      get: function() {
+        var next, prev, str;
+        str = '';
+        prev = this.previousSibling;
+        while (prev) {
+          str = prev.data + str;
+          prev = prev.previousSibling;
+        }
+        str += this.data;
+        next = this.nextSibling;
+        while (next) {
+          str = str + next.data;
+          next = next.nextSibling;
+        }
+        return str;
+      }
+    });
+
+    return XMLText;
+
+  }).call(this);
+
+}).call(this);