/pb already refused them to anyone who is not an admin. /api-prod, the production PocketBase's
public API, passed every /api/ path, so its superuser sign-in was reachable from the public side:
no data was exposed, but it was a place to guess the production admin's password. Now any
/api-prod/api/collections/_… path is refused (403), checked on the decoded path like the /pb gate.
No public client calls these; the one caller in the repo (pb-oidc.mjs) talks to PocketBase directly.
Found by dx-base's independent review of the public Studio (V2).
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