- Persist the list/grid view in a cookie so the server renders the chosen view
on first paint (no localStorage hydration flicker); index/category/author
pages read it and become dynamically rendered
- Add in-category client-side search to category pages via a new BlogFilters
onSearch mode
- Rebuild the author page to match the /blog layout: header, divider, search
aligned with the list/grid toggle; drop the old DefaultLayout (fixes the
duplicate navbar) and old container
- Extract the shared BlogViewToggle used by BlogFilters and the author page
