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/data-view-buffer/test/index.js

@@ -0,0 +1,31 @@
+'use strict';
+
+var test = require('tape');
+var forEach = require('for-each');
+var v = require('es-value-fixtures');
+var inspect = require('object-inspect');
+
+var dataViewBuffer = require('../');
+
+test('dataViewBuffer', function (t) {
+	forEach(
+		// @ts-expect-error TS sucks at [].concat
+		// eslint-disable-next-line no-extra-parens
+		/** @type {[...typeof v.primitives, ...typeof v.objects]} */ ([].concat(v.primitives, v.objects)),
+		function (nonDV) {
+			t['throws'](function () { dataViewBuffer(nonDV); }, TypeError, inspect(nonDV) + ' is not a DataView');
+		}
+	);
+
+	t.test('DataView', { skip: typeof DataView !== 'function' }, function (st) {
+		var ab = new ArrayBuffer(1);
+		var dv = new DataView(ab);
+
+		st.equal(dataViewBuffer(dv), ab, inspect(dv) + ' has the same buffer originally passed to the DataView');
+		st.equal(dataViewBuffer(dv), dv.buffer, inspect(dv) + ' has the same buffer as its own buffer property');
+
+		st.end();
+	});
+
+	t.end();
+});