Selection-highlight tints in selection_plugin and the valid-drop
marker tint in cursor_plugin were hand-tuned RGB literals from the
prior Premium-Solitaire palette. Migrate them to the semantic
state tokens introduced in ui_theme:
- keyboard-drag source highlight (picking) → ACCENT_PRIMARY
- keyboard-drag source highlight (lifted) → STATE_WARNING
- keyboard-drag destination highlight → STATE_SUCCESS
- cursor_plugin::MARKER_VALID → STATE_SUCCESS @ 0.55α
`MARKER_VALID` stays a Color literal (Alpha::with_alpha is not yet
const on stable); a new tracking test pins its RGB to STATE_SUCCESS
so a future palette swap can't drift the two apart silently.
Also fix three stale doc comments in ui_modal that still described
the previous yellow / magenta palette ("Loud yellow CTA",
"Primary swaps to the magenta secondary accent"). Cyan and lavender
now, matching the actual token values.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
funman300
ceec4fc486