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/cv.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_cv=e(_.dayjs)}(this,(function(_){"use strict";function e(_){return _&&"object"==typeof _&&"default"in _?_:{default:_}}var t=e(_),n={name:"cv",weekdays:"вырсарникун_тунтикун_ытларикун_юнкун_кӗҫнерникун_эрнекун_шӑматкун".split("_"),months:"кӑрлач_нарӑс_пуш_ака_май_ҫӗртме_утӑ_ҫурла_авӑн_юпа_чӳк_раштав".split("_"),weekStart:1,weekdaysShort:"выр_тун_ытл_юн_кӗҫ_эрн_шӑм".split("_"),monthsShort:"кӑр_нар_пуш_ака_май_ҫӗр_утӑ_ҫур_авн_юпа_чӳк_раш".split("_"),weekdaysMin:"вр_тн_ыт_юн_кҫ_эр_шм".split("_"),ordinal:function(_){return _},formats:{LT:"HH:mm",LTS:"HH:mm:ss",L:"DD-MM-YYYY",LL:"YYYY [ҫулхи] MMMM [уйӑхӗн] D[-мӗшӗ]",LLL:"YYYY [ҫулхи] MMMM [уйӑхӗн] D[-мӗшӗ], HH:mm",LLLL:"dddd, YYYY [ҫулхи] MMMM [уйӑхӗн] D[-мӗшӗ], HH:mm"}};return t.default.locale(n,null,!0),n}));