Name the replacement for a Tailwind palette colour in the design guard

Plan step 41 review: "colour the theme does not declare `text-red-500`"
was the one family (i) finding without a 2.0.0 hint; it now says the
utility compiles to nothing and points at md-ink-* or var(--md-sys-color-*).
The foundation-only fixture view also carries an <x-dynamic-component> and
an <x-slot:title>, which the stylesheet check must neither report nor trip on.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Qwx5USif3wFFmxtHg5U1g9

src/Testing/DesignGuard.php

@@ -387,7 +387,7 @@ class DesignGuard
 
                 if (preg_match_all($this->colourPattern(), $text, $matches)) {
                     foreach ($matches[0] as $class) {
-                        $violations[] = "{$where}:{$line} colour the theme does not declare `{$class}`";
+                        $violations[] = "{$where}:{$line} Tailwind palette colour `{$class}` compiles to nothing — M3 paints with roles: an `md-ink-*` class, or `var(--md-sys-color-*)` in your own CSS";
                     }
                 }