Complete actionable settings diagnostics after clarified review

[0xroylee]

Task

Complete actionable settings diagnostics after clarified review

Validation

• Reviewed the restored implementation; clarified requirements are met, so retained it unchanged.
• bun run test test/settings.test.ts test/cli/github-commands.test.ts test/cli/run.test.ts: 34 passed, 0 failed.
• bun run lint: passed with 93 warnings and 6 informational diagnostics.
• bun run typecheck: passed.

Risks

• None reported

Limitations

• Full test suite not run.