1. Stream Info + YPP rails are YouTube surfaces → new `youtube` token #ff0000. It is documented
as brand-only: live state stays `primary`, so the two reds never mean the same thing.
2. EDIT toggle: the checked trigger set the SAME colour as the resting face, so clicking it
changed nothing visible. Resting is now the neutral surface with muted text; armed is blue with
dark text, and the label follows the fill.
3. Active scene outline is orange again (`attention`) — it marks the scene you work on, not a
selection; blue made it read as "selected". Live stays red.
4. Scene names wear the same pill as the hotkey chips (black, 10px radius, 8×2 padding), so both
labels stay readable over any thumbnail.
5. REC / ON-AIR pills and the running stop button read red while armed/live — including test
mode, where the top bar is gold. New `RecordPillToggle` style (its own template, because
SegmentToggle hard-codes a transparent face); the stop button's grey `#333` literal is gone.
6. The properties list had `MaxHeight="420"` inside an Auto row, so it scrolled while the window
had space left. The row is `*` now and the cap is gone.
Guard: UiShellTests pins all six to the markup and names the one that regresses.