refactor(ui): remove unused toolbar dot indicator

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

frontend/src/ui/components/ImageNodeActions/index.css

@@ -200,14 +200,6 @@
   background: #f2f4f7;
 }
 
-.toolbar-dot {
-  width: 7px;
-  height: 7px;
-  margin-left: auto;
-  border-radius: 999px;
-  background: #ff5a4e;
-}
-
 .toolbar-menu-separator {
   height: 1px;
   background: #eceff3;

frontend/src/ui/components/ImageNodeActions/index.tsx

@@ -505,7 +505,6 @@ export function ImageNodeToolbar({
                     <button key={item.id} type="button" disabled={disabled} onClick={() => runMoreAction(item.onClick)}>
                       <Icon size={15} />
                       <span>{item.label}</span>
-                      {item.dot && <i className="toolbar-dot" />}
                     </button>
                   );
                 })}