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/2024/StringPaddingBuiltinsImpl.js

@@ -0,0 +1,27 @@
+'use strict';
+
+var $TypeError = require('es-errors/type');
+
+var StringPad = require('./StringPad');
+var ToLength = require('./ToLength');
+var ToString = require('./ToString');
+
+// https://262.ecma-international.org/15.0/#sec-stringpaddingbuiltinsimpl
+
+module.exports = function StringPaddingBuiltinsImpl(O, maxLength, fillString, placement) {
+	if (placement !== 'start' && placement !== 'end' && placement !== 'START' && placement !== 'END') {
+		throw new $TypeError('Assertion failed: `placement` must be ~START~ or ~END~');
+	}
+
+	var S = ToString(O); // step 1
+
+	var intMaxLength = ToLength(maxLength); // step 2
+
+	var stringLength = S.length; // step 3
+
+	if (intMaxLength <= stringLength) { return S; } // step 4
+
+	var filler = typeof fillString === 'undefined' ? ' ' : ToString(fillString); // steps 5-6
+
+	return StringPad(S, intMaxLength, filler, placement); // step 7
+};