Daniel resolved the open questions: high-res compute for all media (B); the
waveform datum is per-track, not per-release (release is just the host —
dissolves the multi-track-Cut question); full-parity lava controls on all
detail hosts. Splits 12.B into compute+backfill / fetch+bridge; renames the
scaffold slot to Ambient. NowPlaying-card controls left as open sub-question.
Generalize the Mix-only WebGL lava visualizer into one release-cardinal
WaveformVisualizer serving Mix detail, all Release Detail pages, and the
home NowPlaying card. Four waves; flags the non-Mix datum-resolution call.
daniel-c-harvey