core&ui: add new features about domain (#528)

Co-authored-by: undefined <i@undefined.moe>

- Add navigation hint
- Update homework/contest filter by assign
- Allow empty query for DomainSelectAutoComplete

packages/ui-default/components/autocomplete/components/DomainSelectAutoComplete.tsx

@@ -44,7 +44,7 @@ DomainSelectAutoComplete.defaultProps = {
   listStyle: {},
   multi: false,
   selectedKeys: [],
-  allowEmptyQuery: false,
+  allowEmptyQuery: true,
   freeSolo: false,
   freeSoloConverter: (input) => input,
 };