v1.4.0

• New: LLMS.TXT module — a virtual /llms.txt file served for AI agents, with its own settings page: site identity (title, summary, AI context), a Core Pages section built from your menu, recent articles under the conventional "Optional" heading, opt-in custom post type sections, and a manual content block.
• New: live /llms.txt preview with Copy, a direct View link, and on-page structural checks (invalid links, duplicate URLs, empty titles).
• New: developer filters for llms.txt sections, items, descriptions, menu depth, and final content.
• Improved: module submenus now appear and disappear instantly in the sidebar when a module is toggled.
• Fixed: the JSON-LD live preview now reflects unchecking the reservation/pets toggles without saving first.