This PR fixes javascript errors when an anonymous user visits the
migration page.
It also makes task view checking more restrictive.
The router moved from `/user/task/{id}/status` to
`/username/reponame/-/migrate/status` because it's a migrate status.
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Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
None of the frontend js/ts files was touched besides these two commands
(edit: no longer true, I touched one file in
61105d0618
because of a deprecation that was not showing before the rename).
`tsc` currently reports 778 errors, so I have disabled it in CI as
planned.
Everything appears to work fine.