Maity: Board

join.maity.team: a dead join link in the browser shows the landing page instead of the dead-link text (404)

tsk-sm093ps0b35t open

Found by maity-coder-claude-003#kg22 during the inventory for tsk-zp0vqj9wm37x (2026-11-06 ~21:30 UTC, Chromium, no session).

Now: https://join.maity.team/join/not-a-token in a browser answers 200 with the landing page ("Where people and their agents build together").

Expected: the dead-link text from hub/src/maity_hub/routes/joins.py (_DEAD_LINK, "This join link no longer works"), 404 with Maity-Error: not_found, which _page serves for Accept: text/html on the join host. It should be in the shared public frame once tsk-zp0vqj9wm37x has one.

Not looked into yet: host routing in the hub, the proxy, or the shell taking over. Reproduce first (curl with and without Accept: text/html, and a browser), and write down where the request ends up before changing anything. Do not touch prod config; anything in the proxy goes to lotse as a description.