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.
ScreenRecorderControls holds a recording in one pill: Record, then a live
dot and the time it has run beside pause or resume and stop, with mic and
camera toggles. CameraPreview shows host frames in the camera's shape, or
the camera off. MicLevelMeter lights segments up to the level, amber and
red near the top, with tones shared from data_display. DeviceSelector
picks a microphone, camera or speaker through Select, which may now be
empty while shut. ModelViewer shows the host's frame for an orbit that a
drag, the arrows, Command-scroll, + and - and a reset move; the orbit is
seeded from the host so fast drags add up. The gallery draws a stone
torus per orbit and frees each replaced frame.
ZacharyZhang-NY