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/asynckit/lib/readable_asynckit.js

@@ -0,0 +1,91 @@
+var streamify = require('./streamify.js')
+  , defer     = require('./defer.js')
+  ;
+
+// API
+module.exports = ReadableAsyncKit;
+
+/**
+ * Base constructor for all streams
+ * used to hold properties/methods
+ */
+function ReadableAsyncKit()
+{
+  ReadableAsyncKit.super_.apply(this, arguments);
+
+  // list of active jobs
+  this.jobs = {};
+
+  // add stream methods
+  this.destroy = destroy;
+  this._start  = _start;
+  this._read   = _read;
+}
+
+/**
+ * Destroys readable stream,
+ * by aborting outstanding jobs
+ *
+ * @returns {void}
+ */
+function destroy()
+{
+  if (this.destroyed)
+  {
+    return;
+  }
+
+  this.destroyed = true;
+
+  if (typeof this.terminator == 'function')
+  {
+    this.terminator();
+  }
+}
+
+/**
+ * Starts provided jobs in async manner
+ *
+ * @private
+ */
+function _start()
+{
+  // first argument – runner function
+  var runner = arguments[0]
+    // take away first argument
+    , args   = Array.prototype.slice.call(arguments, 1)
+      // second argument - input data
+    , input  = args[0]
+      // last argument - result callback
+    , endCb  = streamify.callback.call(this, args[args.length - 1])
+    ;
+
+  args[args.length - 1] = endCb;
+  // third argument - iterator
+  args[1] = streamify.iterator.call(this, args[1]);
+
+  // allow time for proper setup
+  defer(function()
+  {
+    if (!this.destroyed)
+    {
+      this.terminator = runner.apply(null, args);
+    }
+    else
+    {
+      endCb(null, Array.isArray(input) ? [] : {});
+    }
+  }.bind(this));
+}
+
+
+/**
+ * Implement _read to comply with Readable streams
+ * Doesn't really make sense for flowing object mode
+ *
+ * @private
+ */
+function _read()
+{
+
+}