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/ErrorUtils.h

@@ -0,0 +1,42 @@
+/*
+ * 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 <jsi/jsi.h>
+
+namespace facebook::react {
+
+inline static void
+handleJSError(jsi::Runtime& runtime, const jsi::JSError& error, bool isFatal) {
+  auto errorUtils = runtime.global().getProperty(runtime, "ErrorUtils");
+  if (errorUtils.isUndefined() || !errorUtils.isObject() ||
+      !errorUtils.getObject(runtime).hasProperty(runtime, "reportFatalError") ||
+      !errorUtils.getObject(runtime).hasProperty(runtime, "reportError")) {
+    // ErrorUtils was not set up. This probably means the bundle didn't
+    // load properly.
+    throw jsi::JSError(
+        runtime,
+        "ErrorUtils is not set up properly. Something probably went wrong trying to load the JS bundle. Trying to report error " +
+            error.getMessage(),
+        error.getStack());
+  }
+
+  // TODO(janzer): Rewrite this function to return the processed error
+  // instead of just reporting it through the native module
+  if (isFatal) {
+    auto func = errorUtils.asObject(runtime).getPropertyAsFunction(
+        runtime, "reportFatalError");
+
+    func.call(runtime, error.value());
+  } else {
+    auto func = errorUtils.asObject(runtime).getPropertyAsFunction(
+        runtime, "reportError");
+
+    func.call(runtime, error.value());
+  }
+}
+
+} // namespace facebook::react