651f4060e6
- Promote `marker_colour` to module-level const PILE_MARKER_DEFAULT_COLOUR and re-export it. cursor_plugin::MARKER_DEFAULT now imports the const directly, replacing the prior duplicated literal kept in sync only by doc comment. Drift becomes a compile error instead of a stale claim. - Empty-tableau "K" placeholder text now uses TEXT_PRIMARY at 0.35 alpha (was raw `Color::srgba(1.0, 1.0, 1.0, 0.35)`) so it picks up the Terminal off-white foreground. - HINT_PILE_HIGHLIGHT_COLOUR retuned from bright `srgb(1.0, 0.85, 0.1)` to the design-system STATE_WARNING token (`#ddb26f`). Spelled as a literal because Alpha::with_alpha is not yet const on stable; a new test pins the RGB to STATE_WARNING so a palette swap can't drift the two apart silently. - The existing "is gold" character test was hardcoded to the old bright palette (red ≥ 0.9). Loosened to "warmer than cool" + ranges that the Terminal muted gold satisfies, with exact-RGB tracking handled by the new STATE_WARNING test. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>