fix: resolve LFS at build time via git lfs pull

fix: add dockerignore, restore git dep, trim requirements

fix: ship pre-built frontend, drop npm from Docker build

fix: resolve LFS pointers at runtime instead of build time

fix: make face_mesh model pre-download non-fatal during build

fix: download LFS files from HF API during Docker build

fix: restore LFS for all binary files, add git-lfs to Docker build

fix: remove aggressive LFS patterns, keep only L2CS weights as LFS

feat: UI nav, onboarding, L2CS weights path + torch.load; trim dev files

Integrate L2CS-Net gaze estimation

Put all the models together (expect UI)