- Prominent button with colored border (amber pulse when unpinned, green when pinned)
- Dropdown with branch list, selected indicator, and pin status
- Pin icon shows when branch is locked
- Selecting a branch auto-pins it (persists across logout/login)
- Unpin button available to release the lock
- Visual hint text explains pin behavior
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>