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/jsc-android/dist/include/JSCallbackFunction.h

@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2006-2019 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
+ */
+
+#ifndef JSCallbackFunction_h
+#define JSCallbackFunction_h
+
+#include "InternalFunction.h"
+#include "JSObjectRef.h"
+
+namespace JSC {
+
+class JSCallbackFunction final : public InternalFunction {
+    friend struct APICallbackFunction;
+public:
+    typedef InternalFunction Base;
+
+    template<typename CellType, SubspaceAccess mode>
+    static IsoSubspace* subspaceFor(VM& vm)
+    {
+        return vm.callbackFunctionSpace<mode>();
+    }
+
+    static JSCallbackFunction* create(VM&, JSGlobalObject*, JSObjectCallAsFunctionCallback, const String& name);
+
+    DECLARE_INFO;
+    
+    // InternalFunction mish-mashes constructor and function behavior -- we should 
+    // refactor the code so this override isn't necessary
+    static Structure* createStructure(VM& vm, JSGlobalObject* globalObject, JSValue proto) 
+    { 
+        return Structure::create(vm, globalObject, proto, TypeInfo(InternalFunctionType, StructureFlags), info()); 
+    }
+
+private:
+    JSCallbackFunction(VM&, Structure*, JSObjectCallAsFunctionCallback);
+    void finishCreation(VM&, const String& name);
+
+    JSObjectCallAsFunctionCallback functionCallback() { return m_callback; }
+
+    JSObjectCallAsFunctionCallback m_callback { nullptr };
+};
+
+} // namespace JSC
+
+#endif // JSCallbackFunction_h