For segmented beats, the repair stage now searches for the source action
window using the segment's own description first; the full beat context is
used only as a fallback or when it scores noticeably higher. The trailer-
offset shift is applied only when the beat context is actually chosen.
Also harden vision-call retries to catch read-side network errors
(TimeoutError, socket.timeout, ConnectionError, OSError) and wrap the
filter/repair loop so a transient vision failure preserves the previously
cached match instead of dropping it.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>