Restore original English demo UI exactly

Restore native Gradio UI and use GroundingPI account model

Fix Chinese OCR labels with bundled CJK font

Remove XPENG branding and show disabled Video media option

Replace gallery with 22 original cases and support point-in-mask tasks

Label dense boxes once per category and avoid overlapping tags

Fix responsive layout, request status lifecycle and prediction inspection

Deploy private GroundingPI Gradio interface and ZeroGPU runtime