Nidra->Backyard track; add Sharing badge + linked agent-traces dataset

Add X social post link to README

Add demo video link to README

Fix story body text colour (Gradio prose override)

Add team HF username to README (submission requirement)

README rewrite: plainer human voice, drop template scaffolding

README overhaul: judge-first structure, canonical tags, short_description, Field Notes

a11y polish: theme floating component labels, AA owl roles, brighter secondary text

Build-Small submission: field-guide UI + Modal backend

initial commit