fix: use as_posix() for HF repo paths (Windows backslash bug in upload)

fix: upload per-subdirectory to avoid commit timeout; fix .hfignore encoding + artifacts/

feat: HF model repo at v1/v2 root; version selector UI with download submenu; artifacts/ out of git

fix: use project root as snapshot_download local_dir (fix double artifacts/ path)

fix: include figures/reports in HF Hub upload; fix unicode print on Windows

Add notebooks

feat: full project — ML simulation, dashboard UI, models on HF Hub