Eliminate .bak file backups from edit, docs, lint, testgen, and agent commands to simplify safety features, relying on previews and confirmations instead. Update README, architecture docs, troubleshooting, and TODOs to reflect changes. Adjust tests to remove backup assertions.
- Add error checking for os.Setenv and io operations in test files
- Use anonymous functions in defer to ignore errors from os.Remove, os.Setenv, etc.
- Minor formatting and consistency fixes in tests and client code
- Introduce newGrokClient and gitRun vars to allow mocking in tests.
- Refactor commit, commitmsg, history, prdescribe, and review cmds into separate run funcs.
- Update docs, lint, and review to use newGrokClient.
- Add comprehensive unit tests in run_test.go covering happy paths, errors, and edge cases.
- Expand grok client tests with SSE server mocks for Stream* methods.
