Add running target indicator to command palette

Fetch /picture-targets/batch/states alongside entity data and show a
small green glowing dot next to targets that are currently processing.

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

server/src/wled_controller/static/css/layout.css

@@ -489,6 +489,15 @@ h2 {
     color: var(--text-secondary);
 }
 
+.cp-running {
+    width: 6px;
+    height: 6px;
+    border-radius: 50%;
+    background: #4caf50;
+    flex-shrink: 0;
+    box-shadow: 0 0 4px #4caf50;
+}
+
 .cp-loading,
 .cp-empty {
     padding: 24px 16px;