gum draws its confirm UI on stderr, so the migration's `2>/dev/null` threw
away the whole prompt while gum still held the terminal in raw mode reading
keys. With a browser open, an update stopped after "Running migration
(1786643346)" on an unpainted screen with no way to tell it was waiting for
an answer.
Nothing else in the repo suppresses gum's stderr; the redirect only ever hid
gum's own error in the no-terminal case, where the migration already explains
itself on stderr before deferring.
Fixes#6841
Claude-Session: https://claude.ai/code/session_01So4yKzTDdJJp7orjnF8i1J
Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>
