Steve Yegge 637f38edca Remove os.Exit() from library code (gt-fm75) ...

Refactor to return errors instead of calling os.Exit() directly:
- Add SilentExitError type for commands that signal status via exit code
- Update mail.go runMailPeek() and runMailCheck() to return errors
- Change Execute() to return int exit code instead of calling os.Exit()
- Move os.Exit() call to main() where it belongs

This improves testability, enables graceful shutdown, and follows Go
conventions for library code.

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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

2025-12-30 10:54:29 -08:00

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