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/react-native/ReactCommon/cxxreact/JSExecutor.cpp

@@ -0,0 +1,50 @@
+/*
+ * 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.
+ */
+
+#include "JSExecutor.h"
+
+#include "RAMBundleRegistry.h"
+
+#include <folly/Conv.h>
+#include <jsinspector-modern/ReactCdp.h>
+
+#include <chrono>
+
+namespace facebook::react {
+
+std::string JSExecutor::getSyntheticBundlePath(
+    uint32_t bundleId,
+    const std::string& bundlePath) {
+  if (bundleId == RAMBundleRegistry::MAIN_BUNDLE_ID) {
+    return bundlePath;
+  }
+  return folly::to<std::string>("seg-", bundleId, ".js");
+}
+
+double JSExecutor::performanceNow() {
+  auto time = std::chrono::steady_clock::now();
+  auto duration = std::chrono::duration_cast<std::chrono::nanoseconds>(
+                      time.time_since_epoch())
+                      .count();
+
+  constexpr double NANOSECONDS_IN_MILLISECOND = 1000000.0;
+  return duration / NANOSECONDS_IN_MILLISECOND;
+}
+
+std::unique_ptr<jsinspector_modern::RuntimeAgentDelegate>
+JSExecutor::createAgentDelegate(
+    jsinspector_modern::FrontendChannel frontendChannel,
+    jsinspector_modern::SessionState& sessionState,
+    std::unique_ptr<jsinspector_modern::RuntimeAgentDelegate::ExportedState>,
+    const jsinspector_modern::ExecutionContextDescription&
+        executionContextDescription) {
+  (void)executionContextDescription;
+  return std::make_unique<jsinspector_modern::FallbackRuntimeAgentDelegate>(
+      std::move(frontendChannel), sessionState, getDescription());
+}
+
+} // namespace facebook::react