The gallery's entry runs natively or, on wasm32, from a wasm_bindgen start
through gpui_web, single-threaded with WebGL2 fallback. ?page, ?story and
?theme choose what shows; an unknown one fails in the page and the log.
set_theme switches the mode later. Pictures load from ELY_GALLERY_ASSETS.
scripts/stories.py writes examples/gallery/stories.json from the pages.
- BrowserPreview: the address with a lock and a spinner while it loads, the
host's frame shown, and the frames so far along the foot as Tab stops;
ScreenshotStream is that strip
- ComputerUseViewer: the host's frame, a ring where the agent points that
rings again at each new point, and what it does there
- LivePreview: the host's page under its address, with reload
- ArtifactPanel: title, versions through chat::BranchNavigator, Preview and
Source when it has both, copy and download; it fails loud with neither
- gallery: frames cut from the gallery's own pages; one asset! macro in
main.rs replaces three copies
ZacharyZhang-NY