The Live/DVR panel guessed DVR from a 60s seekable-window threshold, so an
EVENT source read as 'sliding live' until it had aggregated enough segments.
Classify from the parsed playlistType ('EVENT') via getMediaPlaylistMetadata
instead. Gate on metadata presence (show 'live (resolving…)' until a timeline
track has metadata) so an EVENT source no longer flickers through 'sliding
live' on load/reload before the playlist resolves.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Adds a Live/DVR panel (stream type, window classification, live gap,
DVR window length, buffer-ahead, presentation anchor + wall-clock) and
seek controls (seek-to-live, -10/-30s, jump to window start) to the SPF
segment-loading harness. All derived sandbox-side from presentation
streamType + the native video; degrades cleanly to on-demand.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Feedback from @decepulis treated as a fast follow/incremental improvement effort for expediency.
Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
