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/foreground-child/dist/esm/all-signals.js

@@ -0,0 +1,52 @@
+import constants from 'node:constants';
+export const allSignals = 
+// this is the full list of signals that Node will let us do anything with
+Object.keys(constants).filter(k => k.startsWith('SIG') &&
+    // https://github.com/tapjs/signal-exit/issues/21
+    k !== 'SIGPROF' &&
+    // no sense trying to listen for SIGKILL, it's impossible
+    k !== 'SIGKILL');
+// These are some obscure signals that are reported by kill -l
+// on macOS, Linux, or Windows, but which don't have any mapping
+// in Node.js. No sense trying if they're just going to throw
+// every time on every platform.
+//
+// 'SIGEMT',
+// 'SIGLOST',
+// 'SIGPOLL',
+// 'SIGRTMAX',
+// 'SIGRTMAX-1',
+// 'SIGRTMAX-10',
+// 'SIGRTMAX-11',
+// 'SIGRTMAX-12',
+// 'SIGRTMAX-13',
+// 'SIGRTMAX-14',
+// 'SIGRTMAX-15',
+// 'SIGRTMAX-2',
+// 'SIGRTMAX-3',
+// 'SIGRTMAX-4',
+// 'SIGRTMAX-5',
+// 'SIGRTMAX-6',
+// 'SIGRTMAX-7',
+// 'SIGRTMAX-8',
+// 'SIGRTMAX-9',
+// 'SIGRTMIN',
+// 'SIGRTMIN+1',
+// 'SIGRTMIN+10',
+// 'SIGRTMIN+11',
+// 'SIGRTMIN+12',
+// 'SIGRTMIN+13',
+// 'SIGRTMIN+14',
+// 'SIGRTMIN+15',
+// 'SIGRTMIN+16',
+// 'SIGRTMIN+2',
+// 'SIGRTMIN+3',
+// 'SIGRTMIN+4',
+// 'SIGRTMIN+5',
+// 'SIGRTMIN+6',
+// 'SIGRTMIN+7',
+// 'SIGRTMIN+8',
+// 'SIGRTMIN+9',
+// 'SIGSTKFLT',
+// 'SIGUNUSED',
+//# sourceMappingURL=all-signals.js.map