0c190083cd
Per-kind renderers, each a lazy split chunk: plain-iframe video/maps (wheel chains to the transcript; maps gate scroll behind ⌘), the in-document blockquote-script path for X/Instagram, the dark Spotify player, and the YouTube iframe. Adds Mermaid and DOMPurify-sanitised SVG fences and GFM alert callouts, all sized to 33dvh and theme-matched to avoid white color-scheme artifacts. Main-process stamps a Referer on YouTube embed requests.