fix: header height (#360)

Co-authored-by: tnt group <dodu@live.cn>

Co-authored-by: tnt group <dodu@live.cn>

Author: uyarn

src/style/layout.less

@@ -6,6 +6,10 @@
   width: fit-content;
 }
 
+.t-layout__header {
+  height: auto;
+}
+
 .t-button + .t-button {
   margin-left: @spacer;
 }