Shareable builder links and a Post Content sidebar

Builder URLs now include the open template or layout, so reloads, shared links, and browser history reopen the same view.

This release also adds a wide-screen Post Content layout with a sticky sidebar, member links on locked Table of Contents entries, and 27 new section presets.

• Added wide-screen Post Content layout that centers the post column and places Table of Contents and widget blocks in a sticky sidebar when space allows.
• Added member links on locked Table of Contents entries for member-only posts.
• Added a featured image lightbox on post and page headers.
• Added target and rel attributes on external links across exported themes.
• Added 27 new section presets for heroes, content headers, posts feeds, stats, and CTAs.
• Added member lock indicators on post cards.
• Added builder URLs that include the open template or layout, so reloads, shared links, and browser history reopen the same view.
• Improved Post Content on narrow screens: the Table of Contents widget moves above the article when the sidebar stacks below the post.
• Improved Ghost content refresh loading state on the connection card.
• Improved Table of Contents to hide the heading directly above it when the table has no anchor links.
• Changed the default wide container width to 1400px to pair with the Post Content sidebar layout.
• Changed exported themes to load page scripts from one shared JavaScript file.
• Fixed Post Content sidebar offset with the wide-screen layout.
• Fixed featured video scripts loading in the page footer.
• Fixed Ghost search displaying when mobile navigation open.
• Fixed export dropping HTML color mode.
• Fixed author cover layout spacing when card style is hidden.
• Fixed footer social links not rendering in exported themes.
• Fixed Recommendations block still showing a description when the Description setting is off.
• Fixed tag header content width.