perf(styles): 优化全局“表格”样式

1. 去掉表头的圆角

src/styles/global.scss

@@ -35,6 +35,20 @@
     border-bottom: none;
   }
 
+  .ant-table-header {
+    border-radius: 0;
+  }
+
+  table > thead > tr:first-child > {
+    *:first-child {
+      border-start-start-radius: 0;
+    }
+
+    *:last-child {
+      border-start-end-radius: 0;
+    }
+  }
+
   .ant-table-thead
     > tr
     > th.ant-table-cell:not(:last-child, .ant-table-selection-column, .ant-table-row-expand-icon-cell, [colspan]) {