Removing a profile left its state file behind: the daemon deletes what it
owns, but the file holding the account email is user-owned and out of reach
for a root daemon, which is why Connection.Logout already clears it from the
UI side.
Beyond the stray file, legacy profiles are keyed by name rather than by a
generated ID, so recreating a profile under a removed one's name inherited
its email — shown as the account in the profile list and sent as the
login_hint on the next login.
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