- Add vcs_client.go with vcsClient interface, giteaClientVCSAdapter, githubClientVCSAdapter
- Add giteaExtendedClient interface for Gitea-specific operations (supersede, resolve, etc.)
- Add --vcs-type flag (gitea|github, default: gitea) with VCS_TYPE env var support
- Replace direct giteaClient usage with vcsClient interface in main.go
- Add verdictToVCSEvent() to map LLM verdict to vcs.ReviewEvent
- Gitea adapter translates vcs.ReviewEvent back to Gitea API format (APPROVE->APPROVED)
- Guard Gitea-specific ops (RequestReviewer, supersede, resolve) with type assertion
- Guard fetchPatterns GetAllFilesInPath with Gitea-only type assertion
- Replace reviewClientAdapter (giteaClientAdapter) for review.GiteaClient interface
- Update main_test.go to use reviewInfo/commitStatusInfo instead of gitea types