Feature Request: Display GPG Signature Status in Commit History View

When browsing commit history on GitHub, each commit is annotated with a badge indicating whether it has been GPG-signed and verified:

I propose introducing a similar visual indicator in GitFourchette to surface GPG signature status. This could work alongside or as an extension of the existing "Mark author/committer signature differences" option.

Suggested Feature Name

Mark GPG Verified Commits

Proposed Behavior

• Commits with valid, verified GPG signatures would be marked similarly to how GitHub does (e.g., ✔ Verified).
• Unverified commits could be either:
  • Left unmarked, or
  • Explicitly marked with an ✕ or similar indicator, depending on whether the user's GitHub account is in Vigilant Mode.

Example mock-up:

Motivation

Adding this feature would:

• Improve visibility of commit authenticity directly within GitFourchette.
• Enhance workflows for security-conscious teams or maintainers.
• Align GitFourchette's functionality with widely adopted GitHub UI conventions.

Let me know if you'd like help implementing or mocking up further UX variants!