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/react-native/scripts/compose-source-maps.js

@@ -0,0 +1,66 @@
+#!/usr/bin/env node
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @format
+ */
+
+'use strict';
+
+const fs = require('fs');
+const {composeSourceMaps} = require('metro-source-map');
+
+const argv = process.argv.slice(2);
+let outputPath;
+for (let i = 0; i < argv.length; ) {
+  if (argv[i] === '-o') {
+    outputPath = argv[i + 1];
+    argv.splice(i, 2);
+    continue;
+  }
+  ++i;
+}
+if (!argv.length) {
+  process.stderr.write(
+    'Usage: node compose-source-maps.js <packager_sourcemap> <compiler_sourcemap> [-o output_file]\n',
+  );
+  process.exitCode = -1;
+} else {
+  const [packagerSourcemapPath, compilerSourcemapPath] = argv.splice(0, 2);
+  const packagerSourcemap = JSON.parse(
+    fs.readFileSync(packagerSourcemapPath, 'utf8'),
+  );
+  const compilerSourcemap = JSON.parse(
+    fs.readFileSync(compilerSourcemapPath, 'utf8'),
+  );
+
+  if (
+    packagerSourcemap.x_facebook_offsets != null ||
+    compilerSourcemap.x_facebook_offsets != null
+  ) {
+    throw new Error(
+      'Random Access Bundle (RAM) format is not supported by this tool; ' +
+        'it cannot process the `x_facebook_offsets` field provided ' +
+        'in the base and/or target source map(s)',
+    );
+  }
+
+  if (compilerSourcemap.x_facebook_segments != null) {
+    throw new Error(
+      'This tool cannot process the `x_facebook_segments` field provided ' +
+        'in the target source map.',
+    );
+  }
+
+  const composedMapJSON = JSON.stringify(
+    composeSourceMaps([packagerSourcemap, compilerSourcemap]),
+  );
+  if (outputPath) {
+    fs.writeFileSync(outputPath, composedMapJSON, 'utf8');
+  } else {
+    process.stdout.write(composedMapJSON);
+  }
+}