Prevent Voting and Deadline Extension After Poll Ends (api/end-poll) #75
Description
/api/polls/:pollId/close
- Implement logic so that once a poll is ended (manually or when the deadline is reached), users cannot submit any new votes.
- Prevent users from extending the poll deadline after it has ended.
- Update backend routes to check poll status before allowing vote submissions or deadline changes.
- Ensure frontend displays ended polls as closed and disables voting/extension actions
- Add error messages for attempts to vote or extend time on ended polls.