teleopSample viewer: fix mislabeled 'steel tray' text, unify raw-data download link style with egoSample, fix broken FaberU/pickplace_samples download path

Faber U viewer: dataset link -> FaberU/workshop_samples/<episode dir> (teleopSample reorg)

teleopSample: one shared step UI for all 22 episode pages

teleopSample: step annotations + timeline on the older pages, autoplay on ours

teleop: mp4 file chips -> clip.html (with back button)

teleop sync: hold master back for stuck-behind tiles (no more start-replay on slow bandwidth)

teleop viewer: multi-view sync — slow-loading tile skips to freshest buffered frame instead of replaying from start

teleopSample: unified sidebar viewer + 8 Faber U (skild) episodes (7-cam, faces masked), legacy ep0-5 kept