When first arg to `gt convoy create` looks like a beads issue ID
(e.g., gt-abc, bd-xyz), treat all args as issues and auto-generate
the convoy name from the first issue title.
This prevents the bug where `gt convoy create gt-abc` would use
"gt-abc" as the convoy name instead of recognizing it as an issue
to track.
(gt-7qyfh)
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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