ui: UserSelectAutoComplete: use uid if username is pure number

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

@@ -26,7 +26,7 @@ const UserSelectAutoComplete = forwardRef<AutoCompleteHandle<Udoc>, AutoComplete
       }
     `, ['data', 'users'])}
     itemText={(user) => user.uname + (user.displayName ? ` (${user.displayName})` : '')}
-    itemKey={(user) => (props.multi ? user._id.toString() : user.uname)}
+    itemKey={(user) => ((props.multi || /^[+-]?\d+$/.test(user.uname.trim())) ? user._id.toString() : user.uname)}
     renderItem={(user) => (
       <div className="media">
         <div className="media__left medium">