chore: fix header height

Author: uyarn

src/style/layout.less

@@ -7,6 +7,10 @@
   width: fit-content;
 }
 
+.t-layout__header {
+  height: auto;
+}
+
 .t-layout.t-layout--with-sider {
   > .t-layout {
     flex: 1;