When a managed OpenCode process dies mid-turn (crash, health-check
restart), the persisted turn never settles: the trailing assistant
message has no time.completed and its tool parts stay pending/running
forever — the server never finalizes them (anomalyco/opencode#19023).
The existing settle-triggered tail refresh refetches the same stale
records, so the UI kept running tool timers and working styling
indefinitely (#2577).
Now, when a session is authoritatively settled (session.idle/
session.error event, or an authoritative status snapshot lowering a
previously busy session) and the trailing assistant message is still
unfinished with active tool parts and no pending question/permission,
the orphaned parts are finalized locally as error/"Interrupted" with
an end time — the same shape OpenCode itself writes for cancelled
tools. The mark is gated on an explicit idle status (absent status is
"unknown", never judged), never applies while busy (including
question/permission waits), and a later terminal event or refresh
supersedes it while a stale running refresh cannot regress it (the
reducer and materializer already preserve final statuses).
Fixes#2577
Serhii Dziupin
e3202df037