Allow cleartext HTTP on Android for dev server

Android 9+ blocks cleartext HTTP by default. Enable usesCleartextTraffic
so the emulator can reach the Journal dev server at http://10.0.2.2:3000.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/journal/vite.config.ts

@@ -28,5 +28,6 @@ export default defineConfig({
   },
   server: {
     port: 3000,
+    host: true,
   },
 });