The completed download rows already surfaced size + duration; add the concrete
container (MP4/M4A/WebM…) as a compact chip so the library reads as a media list
with a visible format — the audio-vs-video distinction the running-only phase pill
can't show at rest. Pure display of the already-serialized asset.container; locked
by a small DOM test (present when ready, absent before the worker fills it).
peter
bdbff89507