Root cause of pubkey auth failure: SSH key credentials had no username,
so ConnectSSH defaulted to "root" and the server rejected the key.
The SSH key form in ConnectionEditDialog only had Name, PEM, Passphrase.
Added Username field between Name and PEM.
Delete your existing SSH key credentials and re-create them with the
correct username.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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