StreamParty — Widget Gallery mock test fixtures

10 self-contained mock widgets for testing the node→viewer widget pipeline. Each is an iframe-embeddable page. Copy a widget's embed snippet (or just its URL) into a node's Social, Widgets & Links builder — the viewer renders each enabled widget as a positionable overlay (generalized ChatEmbedView, schema {id,title,url,enabled}). Not wired to real data; purely for render/layout verification. Served from ai-lxc; Dan is reverse-proxying a real domain onto it.
Base URL is auto-detected from wherever this page is served, so embeds keep working once a real domain is reverse-proxied in front. Widgets: clock, poll, chat, countdown, now-playing, donate, store, scoreboard, marquee, reactions, weather, viewer-count.