- Add SetDebug()/Debug() methods for showing key prefixes in output
- Debug mode shows: "[cli.success] Success" instead of "Success"
- Add NewSubject() as alias for S() for readability
- Both T() and C() respect debug mode
Debug mode is useful for:
- Identifying which translation keys are used where
- Verifying correct key usage during development
- QA testing of translation coverage
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>