refactor: Use dedicated WebSocket server for torch sync

- Add torch WebSocket server on port 4106
- Remove HTTP polling, use WebSocket for instant sync
- Torch state changes broadcast immediately to all clients
- Auto-reconnect on disconnect
- Add port 4106 to kill-ports script

server/config.ts

@@ -2,6 +2,7 @@
 export const PORT_HTTP = 4101
 export const PORT_TERMINAL = 4103
 export const PORT_GIT = 4105
+export const PORT_TORCH = 4106
 
 // Terminal configuration
 export const WORKING_DIR = process.cwd().replace(/[\\\/]server$/, '')