ST-cmowjeq3q: UI: render hint apart onder error-message in IdeaMdEditor

Vervang <span block mt-0.5 text-status-blocked/80> door <div mt-1 text-foreground/80>
voor de Tip-hint per plan-spec (MD3-token, geen status-kleur).

components/ideas/idea-md-editor.tsx

@@ -124,9 +124,7 @@ export function IdeaMdEditor({ ideaId, kind, initialValue, onCancel }: Props) {
                 {err.line ? `Regel ${err.line}: ` : ''}
                 {err.message}
                 {err.hint && (
-                  <span className="block mt-0.5 text-status-blocked/80">
-                    Tip: {err.hint}
-                  </span>
+                  <div className="mt-1 text-foreground/80">Tip: {err.hint}</div>
                 )}
               </li>
             ))}