/@user/permlink should open /category/@user/permlink

Reference:
https://hive.blog/hivefest/@hivefest/save-the-date-hivefest-2023-22-26-september-rosarito-mexico-ola-surfista (works on denser)
https://hive.blog/@hivefest/save-the-date-hivefest-2023-22-26-september-rosarito-mexico-ola-surfista (doesn't open post, instead /@hivefest view)