复用编辑器背景色浮层菜单

编辑器画布背景色菜单改为复用 PlatformFloatingMenu

背景色选项改为复用 PlatformFloatingMenuItem

删除背景色菜单局部容器样式并更新 TRACKING

src/index.css

@@ -3941,25 +3941,20 @@ html[data-mobile-keyboard-open='true'] .platform-mobile-bottom-dock {
 }
 
 .image-canvas-editor__background-menu {
-  position: absolute;
-  bottom: calc(100% + 0.45rem);
-  left: 0;
   display: inline-flex;
   gap: 0.25rem;
-  border: 1px solid #d9dee8;
-  border-radius: 0.5rem;
-  background: #ffffff;
   padding: 0.32rem;
-  box-shadow: 0 16px 34px rgba(15, 23, 42, 0.14);
 }
 
-.image-canvas-editor__background-menu button {
+.image-canvas-editor__background-menu-item {
   width: 1.75rem;
   height: 1.75rem;
   border-radius: 0.4rem;
+  justify-content: center;
+  padding: 0;
 }
 
-.image-canvas-editor__background-menu button[aria-pressed='true'] {
+.image-canvas-editor__background-menu-item[aria-pressed='true'] {
   border-color: #38bdf8;
   background: #e0f2fe;
 }