fix: 临时修复elementui新版本下拉框宽度问题

Signed-off-by: NicholasLD <nicholasld505@gmail.com>

src/assets/styles/element-ui.scss

@@ -131,3 +131,8 @@
 .el-dropdown .el-dropdown-link {
   color: var(--el-color-primary) !important;
 }
+
+// 修复el-select下拉框宽度问题
+.el-select {
+  width: 240px !important;
+}