A PowerPoint or Word file cannot be shown in a browser and a phone has
nowhere to open one. Preview renders the resource the way its download
would be built, turns it into one PNG per page (Gotenberg to PDF, pdftoppm
to pages), and shows the pages in an overlay that scrolls and pinch-zooms
like anything else. Rendered once per version — updated_at and theme are in
the key — and served from disk afterwards. The theme picker's sample deck
has the same Preview beside its download.
Every presentation now shows the theme picker in the library, since
markdown slides take a theme too.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Dv6sqaY6Vq3ChZHMem3cnU
e92b72d406