tests for app

feat(a16): add batch evaluator over labeled clips; allow .avi uploads via gr.File; gitignore A16/all_videos

revert(a16): drop live overlay; one-shot record/upload -> processed video with skeleton on the right

feat(a16): hide raw webcam pane via CSS so skeleton draws as a filter on a single window; downscale to 480px to cut PNG encode + upload cost

feat(a16): drop sub-tabs, put live skeleton overlay on main feed at ~30 FPS

fix(a16): extract quality gate into pure module so CI tests don't need cv2/tf

skeleton

a16