v3.9.28

fix(stall): watchdog recovers a turn the host silently cancelled

BitFun can cancel a MiniApp agent turn without the console ever receiving the completion event (webview hiccup / stale-run cleanup): the card stayed 'running' forever and auto-run froze. The 10s liveness tick now also tracks the last agent event per run; a turn with no events for 5 minutes is treated as dead - cancelled, reported in the log, and the poll loop re-decides, so auto-run relaunches on the persisted session.