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/es-abstract/2016/IsWordChar.js

@@ -0,0 +1,37 @@
+'use strict';
+
+var $TypeError = require('es-errors/type');
+
+var IsArray = require('./IsArray');
+var IsInteger = require('./IsInteger');
+
+var every = require('../helpers/every');
+var regexTester = require('safe-regex-test');
+
+var isChar = function isChar(c) {
+	return typeof c === 'string' && c.length === 1;
+};
+
+var isWordCharacter = regexTester(/^[a-zA-Z0-9_]$/);
+
+// https://262.ecma-international.org/6.0/#sec-runtime-semantics-iswordchar-abstract-operation
+
+// note: prior to ES2023, this AO erroneously omitted the latter of its arguments.
+module.exports = function IsWordChar(e, InputLength, Input) {
+	if (!IsInteger(e)) {
+		throw new $TypeError('Assertion failed: `e` must be an integer');
+	}
+	if (!IsInteger(InputLength)) {
+		throw new $TypeError('Assertion failed: `InputLength` must be an integer');
+	}
+	if (!IsArray(Input) || !every(Input, isChar)) {
+		throw new $TypeError('Assertion failed: `Input` must be a List of characters');
+	}
+	if (e === -1 || e === InputLength) {
+		return false; // step 1
+	}
+
+	var c = Input[e]; // step 2
+
+	return isWordCharacter(c); // steps 3-4
+};