`merge` decided by whether a usable still existed, so the same clip was included or dropped depending on whether ffmpeg happened to extract a poster — a video WITH a thumbnail was queued and shown as a frozen frame, one without was skipped. Keyed on the mime type instead: the projector shows stills only. The test factory casts through `as unknown as FeedUpload`, so adding a field the queue reads does not fail typechecking — it fails at runtime, which is how this surfaced as ten broken tests rather than a compile error. The factory now carries `mime_type` and the comment says why keeping it in step matters. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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6.4 KiB