Item 11 — "stopping the agent doesn't work". Ctrl+C used to immediately destroy
the renderer. Now a turn-aware state machine (opencode's double-press model, the
user's preferred behaviour):
- While a turn runs (store.info.running): first Ctrl+C → session.interrupt
{session_id} (STOP the agent), and arms a 3s quit window with a warn hint
"⏹ stopped — Ctrl+C again to quit".
- Idle: first Ctrl+C arms the window ("Ctrl+C again to quit"); a stray single
press never nukes the session.
- A second Ctrl+C within the window KILLS the TUI (renderer.destroy → clean
scope teardown → gateway child EOF).
- A blocking prompt still owns Ctrl+C (deny/cancel) — unchanged.
Wiring: renderer.ts gains an `onCtrlC` hook (owns Ctrl+C when not blocked);
entry builds the machine (gateway yielded before the renderer so it can read
`running` + send interrupt). store gains a transient `hint` slice; StatusLine
shows hint (warn, priority) or the busy face (dim).
Live-smoked: long turn → Ctrl+C shows "stopped" + idle dot; second press exits
cleanly with no orphaned gateway child (the user's installed-venv sessions
untouched). 60 pass.
1be5bd92fa