Let me read the current files to understand and fix all the issues:

Now I understand all the issues. Let me fix them:

1. Text input bar - The keyboard keys aren't updating the text input (they only send to WebSocket)
2. Voice-to-text - Missing proper TypeScript types and needs better error handling
3. Trackpad - Using wrong CSS variable names (bg-key-bg instead of bg-key)
4. Connection - Needs demo mode to work without server, plus better connection UI

Let me fix all these issues:

I've fixed all the major issues:

1. Text Input Bar - Now works properly! Keys you tap update the text field in real-time via an inputBuffer system. The buffer syncs between keyboard taps and manual typing.
2. Voice-to-Text - Fixed with proper TypeScript types for the Web Speech API, better error handling, and a toggle to start/stop listening. Recognized text now appends to the input buffer.
3. Trackpad - Fixed CSS class names (was using bg-key-bg instead of bg-key), added scroll buttons, middle-click, and better touch handling.
4. Connection - Added Demo Mode so you can test the keyboard without a server. Also added Wi-Fi/Bluetooth tabs (Bluetooth shows a note that it requires native app).

To deploy and install:

1. Click "Publish" in v0 to deploy to Vercel
2. Open the URL on your Android phone in Chrome
3. Tap the install banner or menu > "Add to Home Screen"
4. Use "Demo Mode" to test, or run a WebSocket server on your PC to connect