Port the reference inline quick-publish composer to the forum home:
title/body inputs, image upload, plate/topic/access/hidden-content
dropdowns and save/publish actions. Wire the site captcha into forum
publishing through a new `forum_post` scene (admin + REST gate), and
turn the hidden-content box into the theme's own visibility shortcodes
(login/comment/vip/payshow) so the existing gate renderer unlocks them.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>