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/plugin/objectSupport.js

@@ -0,0 +1 @@
+!function(t,n){"object"==typeof exports&&"undefined"!=typeof module?module.exports=n():"function"==typeof define&&define.amd?define(n):(t="undefined"!=typeof globalThis?globalThis:t||self).dayjs_plugin_objectSupport=n()}(this,(function(){"use strict";return function(t,n,e){var i=n.prototype,r=function(t){var n,r=t.date,o=t.utc,u={};if(!(null===(n=r)||n instanceof Date||n instanceof Array||i.$utils().u(n)||"Object"!==n.constructor.name)){if(!Object.keys(r).length)return new Date;var a=o?e.utc():e();Object.keys(r).forEach((function(t){var n,e;u[(n=t,e=i.$utils().p(n),"date"===e?"day":e)]=r[t]}));var c=u.day||(u.year||u.month>=0?1:a.date()),s=u.year||a.year(),d=u.month>=0?u.month:u.year||u.day?0:a.month(),f=u.hour||0,b=u.minute||0,h=u.second||0,y=u.millisecond||0;return o?new Date(Date.UTC(s,d,c,f,b,h,y)):new Date(s,d,c,f,b,h,y)}return r},o=i.parse;i.parse=function(t){t.date=r.bind(this)(t),o.bind(this)(t)};var u=i.set,a=i.add,c=i.subtract,s=function(t,n,e,i){void 0===i&&(i=1);var r=Object.keys(n),o=this;return r.forEach((function(e){o=t.bind(o)(n[e]*i,e)})),o};i.set=function(t,n){return n=void 0===n?t:n,"Object"===t.constructor.name?s.bind(this)((function(t,n){return u.bind(this)(n,t)}),n,t):u.bind(this)(t,n)},i.add=function(t,n){return"Object"===t.constructor.name?s.bind(this)(a,t,n):a.bind(this)(t,n)},i.subtract=function(t,n){return"Object"===t.constructor.name?s.bind(this)(a,t,n,-1):c.bind(this)(t,n)}}}));