VVS's own HudList grids (Monsters/Meta/Route/Items and every other
<list><column> grid this codebase has, present and future) have no
row-selection highlight at all — only the per-cell click callbacks are a
real VTank concept. UiMarkupList.DrawColumns painted a SelectedColor band
under the selected row anyway (a holdover from the legacy single-column
list path, which keeps its own band unchanged — that's a plain list, not a
VVS grid). Removed the band draw from DrawColumns only; SelectedIndexSource
still drives scroll-into-view, and every onclick/onchange callback is
untouched.
New test: ColumnGrids_NeverDrawARowSelectionBand (a column list with a
real in-range selected index must never paint SelectedColor). Mutation
check: before the fix this test was RED against the real code
("expected no SelectedColor fill in a column-based grid"); after removing
the band draw it's green.
tests/AcDream.Plugins.MossTank.Tests: 671/671 (unchanged — this is an
App-layer fix, MossTank markup only consumes the existing <column>
grammar).
tests/AcDream.App.Tests --filter Markup|Plugin|UiMenu|Slider: 277/3 skipped/280 (was 276/3/279, +1 new test).
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
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