- droid_dataset_dashboard.py: render per-clip CoTracker overlays + motion-coverage
stats (frac_moving, mean/max motion) + near-duplicate grouping, and a gradio
gallery sorted least-motion-first to surface weak/duplicate clips.
- app_action.py: DTensor-safe checkpoint hot-swap (copy into each param's local
shard instead of load_state_dict, which errors on FSDP DTensors); a Preview-traces
button that overlays the synthetic control on the frozen first frame before
generating; and a streaming per-step denoise log.
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