PHPLD Next 0.1.6

This is a small polish release following the category-scoped custom fields update.

Changed

• The admin "View site" link now opens in a new browser tab so admins can cross-reference public pages without leaving their current admin screen.
• Approved listings now have "View on site" links from the admin list and edit screens.
• The product plan now captures future listing click behavior controls, including direct-to-website category pages and detail-page-first directories.
• The product plan now records the multi-category custom-field rule: a listing uses the union of fields from its selected categories.

Included from 0.1.5

• Category-scoped custom listing fields.
• Admin field scope controls.
• Public listing pages that only show fields relevant to a listing's categories.