Player report: the action button bar (Menu / Undo / Pause / Help /
Modes / New Game) and Score / Moves / Timer text were sharing the
same vertical band as the stock + foundation row, with no visual
separation. The HUD read as part of the play surface.
Two-part fix:
1. layout.rs reserves HUD_BAND_HEIGHT (64 px) at the top of the
window. Card-grid math takes that off the available vertical
budget so cards still fit; top_y shifts down by the same amount.
New layout test pins the reservation. Existing
worst_case_tableau_fits_vertically tests verify the height-budget
arithmetic still holds.
2. hud_plugin.rs spawns a translucent purple band (BG_HUD_BAND, new
token in ui_theme.rs at the BG_BASE hue with 0.70 alpha) filling
that reserved zone. Z-index sits one rung below Z_HUD so action
buttons paint on top while the band reads as their container. The
band's bottom edge lines up with the top edge of the highest
playable card, so the buttons feel anchored to a "tools strip"
rather than floating in the play area.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
funman300
2c72e1fc87