Symptom

Forcing a brain restart via `/resume`, the Restart Agent menu item, or the implicit prefs-save restart leaves the renderer in a stuck "streaming" UI state:

• Status badge stays on "thinking…".
• Stop button stays visible; Send hidden.
• Input field accepts text but submits get queued instead of fired.
• `streaming === true` never flips back to false.

User has to Ctrl+R the window to escape.

Why

Renderer's `streaming` flag flips to false only on the brain's `agent_end` event (`app.ts` chat-stream handler). `agent.stop()` in main kills the brain process; the brain never gets a chance to emit `agent_end`; the renderer waits forever.

Proposed fix

`AgentManager.stop()` already calls `setStatus("stopped")`, which the renderer receives via `agent:status`. Wire the renderer's `onAgentStatus` handler to also reset turn state:

```ts
window.orbit.onAgentStatus((status, msg) => {
setStatusBadge(status, msg);
if (status === "stopped" || status === "error") {
streaming = false;
sendBtn.classList.remove("hidden");
abortBtn.classList.add("hidden");
// any other turn-end cleanup
}
...
});
```

Or factor the turn-end cleanup into `resetUiForFreshContext` and call it on stopped/error transitions. Either works.

Files

• `app/src/renderer/app.ts` — `onAgentStatus` handler (~line 1918) + a small reset helper.

Repro

1. Send a slow prompt.
2. Type `/resume` while it's streaming.
3. Watch: brain restarts cleanly per `/tmp/orbit.log` but UI stays stuck on "thinking…".

Related

• Orbit: prefs-save kills in-flight prompt without warning #62 (prefs-save kills in-flight prompt) — same root: brain lifecycle events don't unwind renderer state cleanly.