fix: 侧栏账户下拉去掉横向滚动条

Co-authored-by: Cursor <cursoragent@cursor.com>

src/components/top-nav/RightTopUser.vue

@@ -716,14 +716,25 @@ const onMenuClick = async (event: { key: string }) => {
     padding: 0 !important;
     margin: 0 !important;
   }
+
+  /* 固定宽度面板：禁止横向滚动条 */
+  .arco-scrollbar-container {
+    overflow-x: hidden !important;
+  }
+
+  .arco-scrollbar-track-direction-horizontal {
+    display: none !important;
+  }
 }
 
 .csr-user-panel {
   /* 与客户侧栏展开宽对齐 */
   width: 200px;
+  max-width: 200px;
   box-sizing: border-box;
   display: flex;
   flex-direction: column;
+  overflow-x: hidden;
   background: #fff;
   color: var(--color-text-1);
 
@@ -840,7 +851,8 @@ const onMenuClick = async (event: { key: string }) => {
   &__body {
     padding: 6px;
     max-height: min(52vh, 360px);
-    overflow: auto;
+    overflow-x: hidden;
+    overflow-y: auto;
   }
 
   &__footer {