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/readline/test/fixtures/file-in-win1251.txt

@@ -0,0 +1,14 @@
+file n	(folder for keeping information)	ïàïêà æ
+I have a file that I keep all my telephone bills in.
+Ó ìåíÿ åñòü ïàïêà, â êîòîðîé ÿ õðàíþ âñå ñ÷åòà çà òåëåôîí.
+file n	(tool)	íàïèëüíèê ì
+He used a file to smooth the corner of the wood.
+Îí çà÷èñòèë íàïèëüíèêîì êðàé äåðåâà.
+file n	(computer file)	ôàéë ì
+Can you send me the file as an attachment in an email?
+Ìîæåøü ïîñëàòü ìíå ýòîò ôàéë êàê ïðèëîæåíèå ê ýëåêòðîííîìó ïèñüìó?
+I file all my telephone bills together.
+ß ïîäøèâàþ âñå ñ÷åòà çà ýëåêòðè÷åñòâî âìåñòå.
+file vtr	(smooth with a file)	øëèôîâàòü, çà÷èùàòü íåñîâ + âèí
+He filed the wood.
+Îí øëèôîâàë äåðåâî.

smart-app-city/frontend/node_modules/readline/test/fixtures/nmbr.txt

@@ -0,0 +1,7 @@
+1
+2
+3
+4
+5
+6
+7