Fix new-thread shortcuts when terminal is focused

- move chat-wide key handling into `_chat` route-level shortcut handler
- extract reusable `useHandleNewThread` hook and `isTerminalFocused` helper
- update browser WS fixture to support `terminalOpen` RPC shape
fcbf3f3c22Julius Marminge committed on 3/12/2026, 6:50:35 PM· committed by Julius Marmingeparentab0002f
6 files changedLine totals unavailable