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/yaml/browser/dist/schema/json/schema.js

@@ -0,0 +1,62 @@
+import { Scalar } from '../../nodes/Scalar.js';
+import { map } from '../common/map.js';
+import { seq } from '../common/seq.js';
+
+function intIdentify(value) {
+    return typeof value === 'bigint' || Number.isInteger(value);
+}
+const stringifyJSON = ({ value }) => JSON.stringify(value);
+const jsonScalars = [
+    {
+        identify: value => typeof value === 'string',
+        default: true,
+        tag: 'tag:yaml.org,2002:str',
+        resolve: str => str,
+        stringify: stringifyJSON
+    },
+    {
+        identify: value => value == null,
+        createNode: () => new Scalar(null),
+        default: true,
+        tag: 'tag:yaml.org,2002:null',
+        test: /^null$/,
+        resolve: () => null,
+        stringify: stringifyJSON
+    },
+    {
+        identify: value => typeof value === 'boolean',
+        default: true,
+        tag: 'tag:yaml.org,2002:bool',
+        test: /^true$|^false$/,
+        resolve: str => str === 'true',
+        stringify: stringifyJSON
+    },
+    {
+        identify: intIdentify,
+        default: true,
+        tag: 'tag:yaml.org,2002:int',
+        test: /^-?(?:0|[1-9][0-9]*)$/,
+        resolve: (str, _onError, { intAsBigInt }) => intAsBigInt ? BigInt(str) : parseInt(str, 10),
+        stringify: ({ value }) => intIdentify(value) ? value.toString() : JSON.stringify(value)
+    },
+    {
+        identify: value => typeof value === 'number',
+        default: true,
+        tag: 'tag:yaml.org,2002:float',
+        test: /^-?(?:0|[1-9][0-9]*)(?:\.[0-9]*)?(?:[eE][-+]?[0-9]+)?$/,
+        resolve: str => parseFloat(str),
+        stringify: stringifyJSON
+    }
+];
+const jsonError = {
+    default: true,
+    tag: '',
+    test: /^/,
+    resolve(str, onError) {
+        onError(`Unresolved plain scalar ${JSON.stringify(str)}`);
+        return str;
+    }
+};
+const schema = [map, seq].concat(jsonScalars, jsonError);
+
+export { schema };