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User-facing badges, upload guidelines, remove jargon from header

MIST-only gallery with GT, inline styles, remove BCI references

Fix: inline styles (no CSS dependency), remove GT images (licensing), muted badge colors

Fix: remove show_download_button (not in Gradio 6.x Image)

Fix Gradio 6.0: move css to launch(), remove scale from Markdown

Professional UI overhaul: custom CSS, badges, human-readable gallery, auto-load, section headings

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