Add visual selectors to automation and KC target editors

Automation editor:
- IconSelect grid for condition logic (OR/AND) with descriptions

KC target editor:
- IconSelect for color mode (average/median/dominant) with SVG previews
- EntitySelect palette for picture source, pattern template, brightness source

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

server/src/wled_controller/static/sw.js

@@ -7,7 +7,7 @@
  *   - Navigation: network-first with offline fallback
  */
 
-const CACHE_NAME = 'ledgrab-v22';
+const CACHE_NAME = 'ledgrab-v23';
 
 // Only pre-cache static assets (no auth required).
 // Do NOT pre-cache '/' — it requires API key auth and would cache an error page.