* fix(og-image): handle leading slashes in image paths for subpath deployments
Fix Open Graph image paths not working correctly when deploying to subpaths
(e.g., https://example.com/docs/). The issue occurred when image paths with
leading slashes were specified in configuration, causing the subpath to be
ignored.
The fix follows the established pattern used throughout the theme by stripping
leading slashes before applying relURL, ensuring paths respect the baseURL
subpath configuration.
- Update opengraph.html to process image paths consistently
- Update configuration examples to remove leading slashes
- Add investigation document explaining the issue and fix
* chore: remove issue summary
