Renaming any personal mailbox renamed all of them. The account profile and
every personal mailbox shared one identity: syncPersonalIdentity wrote the
profile name and avatar to every row matching (userId, type = 'personal'),
PATCH /api/mailboxes/[id] redirected a rename into that sync instead of the
mailbox row, and both the list response and the client overrode whatever was
stored with the account name. Outgoing mail and message lists did the same,
so a secondary mailbox also sent under the account owner's name.
Only the primary mailbox — the one at the account address — carries the
account identity now. Every other personal mailbox keeps the name and avatar
it was given. The rule lives in one place, lib/profile/identity-utils.ts, and
the API routes, the sender, and the client all go through it.
Existing secondary mailboxes keep whatever name the old blanket update left
on them until they are renamed; the rename now sticks.
Fixes#36
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
