fix: improve command palette actions and automation condition button

- Action items (start/stop, enable/disable) no longer close the palette
- Action items toggle state after success (Start→Stop, Enable→Disable)
- Toast z-index raised above command palette backdrop (3000→3500)
- Automation condition remove button uses ICON_TRASH SVG instead of ✕

server/src/wled_controller/static/css/base.css

@@ -49,7 +49,7 @@
     --z-log-overlay: 2100;
     --z-confirm: 2500;
     --z-command-palette: 3000;
-    --z-toast: 3000;
+    --z-toast: 3500;
     --z-overlay-spinner: 9999;
     --z-lightbox: 10000;
     --z-connection: 10000;