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/dayjs/locale/mn.js

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+!function(_,e){"object"==typeof exports&&"undefined"!=typeof module?module.exports=e(require("dayjs")):"function"==typeof define&&define.amd?define(["dayjs"],e):(_="undefined"!=typeof globalThis?globalThis:_||self).dayjs_locale_mn=e(_.dayjs)}(this,(function(_){"use strict";function e(_){return _&&"object"==typeof _&&"default"in _?_:{default:_}}var t=e(_),d={name:"mn",weekdays:"Ням_Даваа_Мягмар_Лхагва_Пүрэв_Баасан_Бямба".split("_"),months:"Нэгдүгээр сар_Хоёрдугаар сар_Гуравдугаар сар_Дөрөвдүгээр сар_Тавдугаар сар_Зургадугаар сар_Долдугаар сар_Наймдугаар сар_Есдүгээр сар_Аравдугаар сар_Арван нэгдүгээр сар_Арван хоёрдугаар сар".split("_"),weekdaysShort:"Ням_Дав_Мяг_Лха_Пүр_Баа_Бям".split("_"),monthsShort:"1 сар_2 сар_3 сар_4 сар_5 сар_6 сар_7 сар_8 сар_9 сар_10 сар_11 сар_12 сар".split("_"),weekdaysMin:"Ня_Да_Мя_Лх_Пү_Ба_Бя".split("_"),ordinal:function(_){return _},formats:{LT:"HH:mm",LTS:"HH:mm:ss",L:"YYYY-MM-DD",LL:"YYYY оны MMMMын D",LLL:"YYYY оны MMMMын D HH:mm",LLLL:"dddd, YYYY оны MMMMын D HH:mm"},relativeTime:{future:"%s",past:"%s",s:"саяхан",m:"м",mm:"%dм",h:"1ц",hh:"%dц",d:"1ө",dd:"%dө",M:"1с",MM:"%dс",y:"1ж",yy:"%dж"}};return t.default.locale(d,null,!0),d}));