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/index.d.ts

@@ -0,0 +1,23 @@
+/// <reference types="node" />
+import net from 'net';
+import tls from 'tls';
+import { Url } from 'url';
+import { AgentOptions } from 'agent-base';
+import { OutgoingHttpHeaders } from 'http';
+import _HttpsProxyAgent from './agent';
+declare function createHttpsProxyAgent(opts: string | createHttpsProxyAgent.HttpsProxyAgentOptions): _HttpsProxyAgent;
+declare namespace createHttpsProxyAgent {
+    interface BaseHttpsProxyAgentOptions {
+        headers?: OutgoingHttpHeaders;
+        secureProxy?: boolean;
+        host?: string | null;
+        path?: string | null;
+        port?: string | number | null;
+    }
+    export interface HttpsProxyAgentOptions extends AgentOptions, BaseHttpsProxyAgentOptions, Partial<Omit<Url & net.NetConnectOpts & tls.ConnectionOptions, keyof BaseHttpsProxyAgentOptions>> {
+    }
+    export type HttpsProxyAgent = _HttpsProxyAgent;
+    export const HttpsProxyAgent: typeof _HttpsProxyAgent;
+    export {};
+}
+export = createHttpsProxyAgent;