sciagent code + Gitea Actions CI/CD

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

shared/src/components/video-viewer/index.ts

@@ -0,0 +1,11 @@
+/**
+ * `@ump/shared/video-viewer` — a VTK-free 2×2 video dataset quad-viewer.
+ *
+ * Unlike the `@ump/shared/viewer` subpath (which pulls @kitware/vtk.js), this
+ * package depends on nothing beyond react, so it never bloats a page's bundle.
+ */
+export { VideoQuadViewer, default } from './VideoQuadViewer';
+export { ImageSequenceViewer } from './ImageSequenceViewer';
+export * from './types';
+export * from './playbackModel';
+export * from './imageSequenceModel';