修复角色管理查询条件标题和控件错位重叠问题

- 调整search-actions的margin-left从auto改为12px
- 确保查询条件标题和查询控件之间有适当的间距

vue-frontend/src/components/RoleManagement.vue

@@ -725,12 +725,6 @@ export default {
   color: #606266;
 }
 
-.search-form {
-  display: flex;
-  flex-direction: column;
-  gap: 12px;
-}
-
 .search-row {
   display: flex;
   flex-wrap: wrap;
@@ -746,7 +740,7 @@ export default {
 .search-actions {
   display: flex;
   gap: 8px;
-  margin-left: auto;
+  margin-left: 12px;
 }
 
 .action-section {