`ProComposeTabBody` rendered `<EmailComposer>` without
`composeFromAccountEmail`; only the standard shell in
`components/mail/mail-app.tsx` passed it, so `mode === 'compose'` resolved
`findComposeIdentityId(identities, undefined)` to null and every new message
in the Pro shell defaulted to the account owner even with a shared folder
open. That covered the whole compose surface there, since the Pro shell
hoists every "show composer" intent - `mailto:` links included - into a tab.
Resolved exactly as the standard shell does, so both share one rule, but
read once at mount: a tab body stays mounted while the tab lives, so
subscribing to the mailbox list would re-render the composer and its editor
on every counter refresh.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Patrick RotterandClaude Opus 5
Linus Rath
Linus Rath