style(PdfViewer): 移除zoom-controls的hover效果注释

 <!--
  * @Date: 2025-01-21
  * @LastEditors: hookehuyr hookehuyr@gmail.com
- * @LastEditTime: 2025-10-22 15:16:46
+ * @LastEditTime: 2025-10-22 15:25:21
  * @FilePath: /mlaj/src/components/ui/PdfViewer.vue
  * @Description: PDF预览组件 - 使用pdf-vue3库
 -->
@@ -875,12 +875,12 @@ const applyPinchZoom = (newZoom, centerX, centerY, container) => {
     user-select: none;
 }
 
-.zoom-controls:hover {
+/* .zoom-controls:hover {
     background: rgba(255, 255, 255, 0.7);
     box-shadow: 0 6px 30px rgba(0, 0, 0, 0.2);
     transform: translateX(-50%) translateY(-2px);
     backdrop-filter: blur(20px);
-}
+} */
 
 .zoom-controls.dragging {
     cursor: grabbing;