fix(security): address P1 findings from post-refactor audit

feat: Gradio Custom Component for NiiVue (#29)

fix(ui): use head= for NiiVue loading, not dynamic import in js_on_load (#24) (#28)

feat: implement prediction mask binarization for improved visibility in slice comparison

fix(ui): simplify NiiVue loading, add diagnostic logging (#24)

fix(ui): add gr.set_static_paths() to fix HF Spaces Loading bug (#24) (#26)

fix(ui): use head_paths for NiiVue loading on HF Spaces (#24) (#25)

fix(ui): vendor NiiVue library to bypass HF Spaces CSP (#24) (#24)

fix(ui): prediction overlay invisible, race condition, thread safety (#23) (#23)

fix: remove silent failures and redundant checks

fix(ui): replace base64 data URLs with Gradio file serving (#19)

fix(ui): NiiVue viewer re-initializes after segmentation completes (#21)

fix(data): use streaming mode to fix HF Spaces dataset hang (#15)

fix(ui): lazy dataset loading to prevent HF Spaces timeout (#14)

fix(pipeline): copy input files to results_dir and add UI cleanup

fix: resolve technical debt (P2/P3) with TDD validation (#9)

feat(hf-spaces): complete deployment infrastructure for Hugging Face Spaces (#8)

feat(phase-5): polish, observability, and documentation (#6)

feat(phase-4): Gradio UI with NiiVue visualization (#5)