```

chore: upgrade Vite to v7 and update OpenAI services

- Upgrade vite from ^5.0.0 to ^7.1.10 with new Node.js requirements
- Add dotenv package for environment variable management
- Update STT to use gpt-4o-transcribe model
- Remove verbose_json format from STT response
- Format code with consistent style (quotes, spacing)
- Add HMR WebSocket configuration for development
- Improve UI layout with overflow handling
- Reorganize chat interface component order
- Add user message broadcasting to activity log
```

packages/voice-assistant/src/ui/App.css

@@ -55,8 +55,9 @@
 .main {
   display: flex;
   flex: 1;
-  padding: 2rem;
   gap: 2rem;
+max-height: 100vh;
+overflow: hidden;
 }
 
 .chat-interface {
@@ -67,7 +68,7 @@
   display: flex;
   flex-direction: column;
   gap: 1rem;
-  max-height: calc(100vh - 120px);
+  height: 100%;
 }
 
 .chat-interface h2 {