Each engine's status payload reported only running/queued/paused tasks, so finished
generations on a non-primary engine (e.g. radeon, reached via the API) never got to the
front and vanished from the Tasks page. Now every engine also reports its most recent
terminal tasks (capped at 10, newest-first); the front's _merge_engine_tasks already
merges non-primary e.tasks (tagged by engine), so the page shows the last-N per engine.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Mw2KQiswmD69T45fTfjKwW