fix: nz-select display position in safari

Author: ZhaoJiSen

src/sass/ant.less

@@ -16,6 +16,16 @@
   font-size: 13px;
 }
 
+// NG-ZORRO's global select patch positions dropdowns at `top: 100%`. In a CDK
+// overlay Safari resolves that percentage against the pane's content height,
+// which leaves an equally tall blank area above the options.
+.cdk-overlay-pane > .ant-select-dropdown {
+  position: static;
+  top: auto;
+  left: auto;
+  margin: 0;
+}
+
 .dark-dropdown {
   background-color: var(--el-dropdown-bg-color);