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-reanimated/Common/cpp/Tools/AsyncQueue.cpp

@@ -0,0 +1,52 @@
+#include "AsyncQueue.h"
+
+#include <utility>
+
+namespace reanimated {
+
+AsyncQueue::AsyncQueue(std::string name)
+    : state_(std::make_shared<AsyncQueueState>()) {
+  auto thread = std::thread([name, state = state_] {
+#if __APPLE__
+    pthread_setname_np(name.c_str());
+#endif
+    while (state->running) {
+      std::unique_lock<std::mutex> lock(state->mutex);
+      state->cv.wait(
+          lock, [state] { return !state->queue.empty() || !state->running; });
+      if (!state->running) {
+        return;
+      }
+      if (state->queue.empty()) {
+        continue;
+      }
+      auto job = std::move(state->queue.front());
+      state->queue.pop();
+      lock.unlock();
+      job();
+    }
+  });
+#ifdef ANDROID
+  pthread_setname_np(thread.native_handle(), name.c_str());
+#endif
+  thread.detach();
+}
+
+AsyncQueue::~AsyncQueue() {
+  {
+    std::unique_lock<std::mutex> lock(state_->mutex);
+    state_->running = false;
+    state_->queue = {};
+  }
+  state_->cv.notify_all();
+}
+
+void AsyncQueue::push(std::function<void()> &&job) {
+  {
+    std::unique_lock<std::mutex> lock(state_->mutex);
+    state_->queue.emplace(job);
+  }
+  state_->cv.notify_one();
+}
+
+} // namespace reanimated