Fix command palette selection mismatch and card highlight z-index

Sort filtered items by group order so display indices match the array,
preventing wrong entity selection. Raise card-highlight z-index above
sticky section headers so the outline isn't clipped.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

server/src/wled_controller/static/css/patterns.css

@@ -80,6 +80,8 @@
 .card-highlight,
 .template-card.card-highlight {
     animation: cardHighlight 2s ease-in-out;
+    position: relative;
+    z-index: 11;
 }
 
 /* Key Colors target styles */