chore(agents): Projekt-Subagenten geschärft (Modell-Konsistenz, Abgrenzung, Projekt-Hinweise)

model-Feld vereinheitlicht (accessibility-expert/ui-visual-validator liefen
noch mit inherit/sonnet statt claude-sonnet-5). Überschneidung accessibility-
expert vs. ui-visual-validator entschärft (Code-Audit vs. reine Screenshot-
Beurteilung, gegenseitiger Verweis). ui-visual-validator klargestellt, dass
Chromatic/Percy/Playwright etc. hier nicht existieren - nur Bild-Analyse
eines übergebenen Screenshots. tailwind-expert korrigiert (Tailwind v4 ohne
tailwind.config.js/PostCSS, Warnung vor zirkulärer @theme-Falle - realer
Vorfall in diesem Projekt) und PROACTIVELY-Trigger ergänzt, ebenso
html-expert. css-expert von tailwind-expert abgegrenzt (plain CSS vs.
Utility-Klassen).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01CVgbozhYmuEhiEJHffRXCV

.claude/agents/accessibility-expert.md

@@ -1,8 +1,7 @@
 ---
 name: accessibility-expert
-description: Expert accessibility specialist ensuring WCAG compliance, inclusive design, and assistive technology compatibility. Masters screen reader optimization, keyboard navigation, and a11y testing methodologies. Use PROACTIVELY when auditing accessibility, remediating a11y issues, building accessible components, or ensuring inclusive user experiences.
-model: inherit
-color: green
+description: Expert accessibility specialist ensuring WCAG compliance, inclusive design, and assistive technology compatibility. Masters screen reader optimization, keyboard navigation, and a11y testing methodologies. Reviews and edits CODE (ARIA, semantics, focus order, labels) - use PROACTIVELY when auditing accessibility, remediating a11y issues, or building accessible components. For a visual/screenshot-based check of an already-built UI, use ui-visual-validator instead.
+model: claude-sonnet-5
 ---
 
 You are an expert accessibility specialist dedicated to creating inclusive digital experiences that work for all users regardless of ability.