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/esm/locale/br.js

@@ -0,0 +1,93 @@
+// Breton [br]
+import dayjs from '../index';
+
+function lastNumber(number) {
+  if (number > 9) {
+    return lastNumber(number % 10);
+  }
+
+  return number;
+}
+
+function softMutation(text) {
+  var mutationTable = {
+    m: 'v',
+    b: 'v',
+    d: 'z'
+  };
+  return mutationTable[text.charAt(0)] + text.substring(1);
+}
+
+function mutation(text, number) {
+  if (number === 2) {
+    return softMutation(text);
+  }
+
+  return text;
+}
+
+function relativeTimeWithMutation(number, withoutSuffix, key) {
+  var format = {
+    mm: 'munutenn',
+    MM: 'miz',
+    dd: 'devezh'
+  };
+  return number + " " + mutation(format[key], number);
+}
+
+function specialMutationForYears(number) {
+  /* istanbul ignore next line */
+  switch (lastNumber(number)) {
+    case 1:
+    case 3:
+    case 4:
+    case 5:
+    case 9:
+      return number + " bloaz";
+
+    default:
+      return number + " vloaz";
+  }
+}
+
+var locale = {
+  name: 'br',
+  weekdays: 'Sul_Lun_Meurzh_Mercʼher_Yaou_Gwener_Sadorn'.split('_'),
+  months: 'Genver_Cʼhwevrer_Meurzh_Ebrel_Mae_Mezheven_Gouere_Eost_Gwengolo_Here_Du_Kerzu'.split('_'),
+  weekStart: 1,
+  weekdaysShort: 'Sul_Lun_Meu_Mer_Yao_Gwe_Sad'.split('_'),
+  monthsShort: 'Gen_Cʼhwe_Meu_Ebr_Mae_Eve_Gou_Eos_Gwe_Her_Du_Ker'.split('_'),
+  weekdaysMin: 'Su_Lu_Me_Mer_Ya_Gw_Sa'.split('_'),
+  ordinal: function ordinal(n) {
+    return n;
+  },
+  formats: {
+    LT: 'h[e]mm A',
+    LTS: 'h[e]mm:ss A',
+    L: 'DD/MM/YYYY',
+    LL: 'D [a viz] MMMM YYYY',
+    LLL: 'D [a viz] MMMM YYYY h[e]mm A',
+    LLLL: 'dddd, D [a viz] MMMM YYYY h[e]mm A'
+  },
+  relativeTime: {
+    future: 'a-benn %s',
+    past: '%s ʼzo',
+    s: 'un nebeud segondennoù',
+    m: 'ur vunutenn',
+    mm: relativeTimeWithMutation,
+    h: 'un eur',
+    hh: '%d eur',
+    d: 'un devezh',
+    dd: relativeTimeWithMutation,
+    M: 'ur miz',
+    MM: relativeTimeWithMutation,
+    y: 'ur bloaz',
+    yy: specialMutationForYears
+  },
+  meridiem: function meridiem(hour) {
+    return hour < 12 ? 'a.m.' : 'g.m.';
+  } // a-raok merenn | goude merenn
+
+};
+dayjs.locale(locale, null, true);
+export default locale;