Refactoring round one: HttpFontStore/HttpSoundStore/HttpTextureStore collapse into a generic HttpFileStore over a FileStore contract; fontImport/soundImport/textureImport share assetImport with an ImportKind per sort; ImagePicker/FontPicker/SoundPicker sit on FilePicker and describe only their row. The group/comment drag logic leaves GraphCanvas for annotationDrag.ts (with its own unit test), declaredRows.ts replaces the duplicated row build in particles.ts and shaders.ts, and dead code in font/sound/compile/emission/transform/actions is gone. README: asset list, check count 958, the two-job CI, the Scenes wiki page. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>