refactor: Separate git watcher from terminal service

- Create dedicated git-watcher.ts with its own WebSocket server (port 4105)
- Remove git watcher code from terminal.ts (no more PTY dependency)
- Add /ws/git endpoint for Traefik routing
- GitPage now connects to dedicated git WebSocket instead of terminal

server/terminal.ts

@@ -5,15 +5,16 @@
  * even when the main server restarts due to code changes.
  */
 
-import { startTerminalServer, startGitWatcher } from './services/terminal'
+import { startTerminalServer } from './services/terminal'
+import { startGitServer } from './services/git-watcher'
 import { WORKING_DIR } from './config'
 
 console.log('')
 console.log('='.repeat(50))
 console.log('Terminal Server (Independent Process)')
-console.log(`  WebSocket: ws://localhost:4103`)
+console.log(`  Terminal WebSocket: ws://localhost:4103`)
+console.log(`  Git WebSocket: ws://localhost:4105`)
 console.log(`  Working Dir: ${WORKING_DIR}`)
-console.log(`  Git Watcher: enabled`)
 console.log('')
 console.log('This process is stable and won\'t restart')
 console.log('when the main server reloads.')
@@ -21,4 +22,4 @@ console.log('='.repeat(50))
 console.log('')
 
 startTerminalServer()
-startGitWatcher()
+startGitServer()