Configurable underlined link blocks
Expanded link blocks with underline styling options across the builder, block registry, and Astro renderer.
What changed
- Added configurable underline behavior for link blocks.
- Updated builder controls so editors can choose the link treatment visually.
- Carried the new style options through the PHP renderer and Astro component.
Why it matters
Link styling can now be controlled without custom CSS. The change keeps design choices inside the block model, which makes imported and published pages more predictable.