- New GET /api/learning/content/:slug/slides (authMiddleware only)
Renders Marp markdown via marp-core, returns {css, slides[]} for
any authenticated user — no moderator access required
- showViewer: when content_type === 'presentation', hides the body card
and shows a presentation card with title, slide count, and View Slides button
Auto-opens the slide modal immediately on load; button allows re-opening
- openSlidesFromSlug(): fetches slides from user-accessible endpoint
then opens the existing slide preview modal (arrow keys, swipe, dots)
- Viewer already correctly hides feed/categories/search when viewing content;
"Back to Feed" button returns to the main list
ac8cc38e3b