Add stroke-by-stroke Gaussian Splatting playback feature

Embed base64 PLY data directly into viewer iframe to fix infinite loading

Fix detail: Not Found error by using iframe srcdoc instead of temp HTML file route

Fix camera target by transforming original center with SplatMesh matrix

Use native SplatMesh URL loader instead of fetch + fileBytes to fix black screen

Fix viewer camera framing and add upload validation check

Use native Spark.js fileBytes API with explicit fileType ply for reliable 3DGS rendering

Embed PLY binary data directly as Base64 in iframe to bypass all network fetch and origin restrictions

Fix URL resolution and camera auto-framing in 3D Gaussian viewer

Fix base URL resolution and template pre-loading for viewer iframe

Use srcdoc in iframe to prevent Gradio catch-all routing redirects

Enhance PLY delivery lifecycle with dedicated /api/ply/{file_id} endpoint and Blob URL loading

Deploy ZipSplatPlus Space