Remove username to button

pages/time.js

@@ -309,7 +309,6 @@ export default function Time(props) {
             <TableRow>
               <TableCell>名称</TableCell>
               <TableCell>时间段</TableCell>
-              <TableCell>姓名</TableCell>
               <TableCell>操作</TableCell>
             </TableRow>
           </TableHead>
@@ -318,7 +317,6 @@ export default function Time(props) {
               <TableRow key={range.id}>
                 <TableCell>{range.name}</TableCell>
                 <TableCell>{range.range}</TableCell>
-                <TableCell>{range.username}</TableCell>
                 <TableCell>
                   <Button
                     sx={{
@@ -329,7 +327,7 @@ export default function Time(props) {
                     color="primary"
                     onClick={() => updateUsername(range.id, props.username)}
                   >
-                    抢！
+                    {range.username ? range.username : "抢！"}
                   </Button>
                   {isAdmin() && (
                     <Button