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/https-proxy-agent/dist/agent.d.ts

@@ -0,0 +1,30 @@
+/// <reference types="node" />
+import net from 'net';
+import { Agent, ClientRequest, RequestOptions } from 'agent-base';
+import { HttpsProxyAgentOptions } from '.';
+/**
+ * The `HttpsProxyAgent` implements an HTTP Agent subclass that connects to
+ * the specified "HTTP(s) proxy server" in order to proxy HTTPS requests.
+ *
+ * Outgoing HTTP requests are first tunneled through the proxy server using the
+ * `CONNECT` HTTP request method to establish a connection to the proxy server,
+ * and then the proxy server connects to the destination target and issues the
+ * HTTP request from the proxy server.
+ *
+ * `https:` requests have their socket connection upgraded to TLS once
+ * the connection to the proxy server has been established.
+ *
+ * @api public
+ */
+export default class HttpsProxyAgent extends Agent {
+    private secureProxy;
+    private proxy;
+    constructor(_opts: string | HttpsProxyAgentOptions);
+    /**
+     * Called when the node-core HTTP client library is creating a
+     * new HTTP request.
+     *
+     * @api protected
+     */
+    callback(req: ClientRequest, opts: RequestOptions): Promise<net.Socket>;
+}