Regen previews at 256-color palette; 3-cam dataloader gif; add docs/curation_pipeline.md

Lead with robot-arm-free / human-hand collection — README hero + 'What's different' section, tasks.json gets operator/embodiment fields, recording.md explains setup, F7 adds Operator column

Reframe dataset as dynamics / world-model interaction data (not policy demos); document 2026-03-23 as right-sensor-only pilot; add active_sensors per-date in tasks.json; lead with hours and contact frames instead of episode count

Split README into lean front page + docs/{recording,schema,quality,figures,caveats}.md