Fix focused card captions and leave loading bands blank

docker/README.md

@@ -564,15 +564,19 @@ single runtime. Resuming cards have no check. The poster caption band remains
 96 px; Home poster captions are focus-only. Home landscapes retain titles on
 the art and reserve 64 px for focused metadata below it, making wide/tile shelf
 pitches 522/441 px; poster shelves remain 632 px and grids remain 524 px.
-Loading rows reserve the same caption slots and share one pulse layer.
+Loading rows reserve the same blank caption bands and share one pulse layer;
+only art-sized blocks are painted, with no title/subtitle placeholder pills.
 
 `CardBottomPixelTest` samples full native bottom rows on four real posters at
 rest and individually focused, including white Annie Hall and dark Locke.
 `CardGeometryTest` measures 210/327 px caption fitting, card-width titles,
-24 px checks, row pitches, pinned rows and ring clearances. The
-[native option-B proof gallery](https://pages.justinvisser.org/wolfskin/tv-card-meta-build/)
+24 px checks, row pitches, pinned rows and ring clearances to 0.1 px, and checks
+that every reserved loading-caption pixel remains background-coloured.
+`CardCaptionMotionTest` checks visible native glyph pixels when a still-focused
+caption changes title directly or while moving across a Home shelf.
+The [native option-B proof gallery](https://pages.justinvisser.org/wolfskin/tv-card-meta-build/)
 contains the same illustrative watch-state data as the approved frames and
-lists reference deviations; unapproved deviations block merge.
+records renderer/fixture artifacts; unapproved design changes block merge.
 `LibrarySpacingRegressionTest` retains the deep focused index across the
 199↔200-title letter-rail boundary.