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/is-shared-array-buffer/test/index.js

@@ -0,0 +1,39 @@
+'use strict';
+
+var test = require('tape');
+var inspect = require('object-inspect');
+var forEach = require('for-each');
+var v = require('es-value-fixtures');
+var availableTypedArrays = require('available-typed-arrays')();
+
+var isSharedArrayBuffer = require('..');
+
+test('isSharedArrayBuffer', function (t) {
+	t.equal(typeof isSharedArrayBuffer, 'function', 'is a function');
+
+	// @ts-expect-error TS sucks with concat
+	var nonSABs = [].concat(v.primitives, v.objects);
+	forEach(nonSABs, function (nonSAB) {
+		t.equal(isSharedArrayBuffer(nonSAB), false, inspect(nonSAB) + ' is not a SharedArrayBuffer');
+	});
+
+	t.test('actual SharedArrayBuffer instances', { skip: typeof SharedArrayBuffer === 'undefined' }, function (st) {
+		var sab = new SharedArrayBuffer(0);
+
+		st.equal(isSharedArrayBuffer(sab), true, inspect(sab) + ' is a SharedArrayBuffer');
+
+		st.end();
+	});
+
+	t.test('Typed Arrays', { skip: availableTypedArrays.length === 0 }, function (st) {
+		forEach(availableTypedArrays, function (TypedArray) {
+			var ta = new global[TypedArray](0);
+			st.equal(isSharedArrayBuffer(ta.buffer), false, inspect(ta.buffer) + ', the TA\'s buffer, is not a SharedArrayBuffer');
+			st.equal(isSharedArrayBuffer(ta), false, inspect(ta) + ' is not a SharedArrayBuffer');
+		});
+
+		st.end();
+	});
+
+	t.end();
+});