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/jest-util/build/deepCyclicCopy.js

@@ -0,0 +1,76 @@
+'use strict';
+
+Object.defineProperty(exports, '__esModule', {
+  value: true
+});
+exports.default = deepCyclicCopy;
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+const EMPTY = new Set();
+function deepCyclicCopy(
+  value,
+  options = {
+    blacklist: EMPTY,
+    keepPrototype: false
+  },
+  cycles = new WeakMap()
+) {
+  if (typeof value !== 'object' || value === null || Buffer.isBuffer(value)) {
+    return value;
+  } else if (cycles.has(value)) {
+    return cycles.get(value);
+  } else if (Array.isArray(value)) {
+    return deepCyclicCopyArray(value, options, cycles);
+  } else {
+    return deepCyclicCopyObject(value, options, cycles);
+  }
+}
+function deepCyclicCopyObject(object, options, cycles) {
+  const newObject = options.keepPrototype
+    ? Object.create(Object.getPrototypeOf(object))
+    : {};
+  const descriptors = Object.getOwnPropertyDescriptors(object);
+  cycles.set(object, newObject);
+  Object.keys(descriptors).forEach(key => {
+    if (options.blacklist && options.blacklist.has(key)) {
+      delete descriptors[key];
+      return;
+    }
+    const descriptor = descriptors[key];
+    if (typeof descriptor.value !== 'undefined') {
+      descriptor.value = deepCyclicCopy(
+        descriptor.value,
+        {
+          blacklist: EMPTY,
+          keepPrototype: options.keepPrototype
+        },
+        cycles
+      );
+    }
+    descriptor.configurable = true;
+  });
+  return Object.defineProperties(newObject, descriptors);
+}
+function deepCyclicCopyArray(array, options, cycles) {
+  const newArray = options.keepPrototype
+    ? new (Object.getPrototypeOf(array).constructor)(array.length)
+    : [];
+  const length = array.length;
+  cycles.set(array, newArray);
+  for (let i = 0; i < length; i++) {
+    newArray[i] = deepCyclicCopy(
+      array[i],
+      {
+        blacklist: EMPTY,
+        keepPrototype: options.keepPrototype
+      },
+      cycles
+    );
+  }
+  return newArray;
+}