Extend the app and UI to surface keypoint confidence more clearly. This adds optional confidence-based coloring with a legend, an annotated image download, and a confidence table sorted by lowest scores first. It also preloads the default SuperAnimal PyTorch model in a background thread so the first request is less likely to block on model download.
Switch the UI from `gr.Interface` to a `gr.Blocks` layout with an explicit Run button, lazy-cached examples, and serialized queueing to avoid startup/download issues and PyTorch concurrency problems. The MegaDetector selector is now shown only for non-PyTorch backends, display settings are grouped under an accordion, and the bundled examples were cleaned up and expanded.
Introduce a PyTorch inference path for SuperAnimal models, including backend selection in the UI, cached pose/detector runners, and JSON export of predictions. The legacy TensorFlow flow now maps model names separately from local directories, and MegaDetector device selection was corrected for yolov5 loading. The DeepLabCut dependency is also pinned to 3.0.2 to match the new backend integration.
