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

HF rejects any binary files not tracked by LFS. Re-added LFS patterns
for *.npz, *.pt, *.joblib, etc. Added git-lfs install to Dockerfile
with a fallback to pull real files if pointers are copied, plus
build-time checkpoint verification.

.gitattributes

@@ -3,6 +3,6 @@ models/L2CS-Net/models/L2CSNet_gaze360.pkl filter=lfs diff=lfs merge=lfs -text
 *.npz filter=lfs diff=lfs merge=lfs -text
 *.pt filter=lfs diff=lfs merge=lfs -text
 *.pth filter=lfs diff=lfs merge=lfs -text
-*.pkl filter=lfs diff=lfs merge=lfs -text
 *.joblib filter=lfs diff=lfs merge=lfs -text
 *.db filter=lfs diff=lfs merge=lfs -text
+*.pkl filter=lfs diff=lfs merge=lfs -text

Dockerfile

@@ -11,9 +11,11 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
     libglib2.0-0 libsm6 libxrender1 libxext6 libxcb1 libgl1 libgomp1 \
     ffmpeg libavcodec-dev libavformat-dev libavutil-dev libswscale-dev \
     libavdevice-dev libopus-dev libvpx-dev libsrtp2-dev \
-    build-essential nodejs npm git \
+    build-essential nodejs npm git git-lfs \
     && rm -rf /var/lib/apt/lists/*
 
+RUN git lfs install
+
 RUN pip install --no-cache-dir torch torchvision --index-url https://download.pytorch.org/whl/cpu
 
 COPY requirements.txt ./
@@ -21,6 +23,12 @@ RUN pip install --no-cache-dir -r requirements.txt
 
 COPY . .
 
+# If HF copies LFS pointers instead of real files, pull them
+RUN if head -c 40 checkpoints/mlp_best.pt 2>/dev/null | grep -q 'git-lfs'; then \
+      echo "LFS pointers detected — pulling real files..." && \
+      git lfs pull 2>/dev/null || echo "git lfs pull skipped (no .git dir)"; \
+    fi
+
 RUN python -c "\
 import os, sys;\
 checks = [\
@@ -38,7 +46,7 @@ for path, min_bytes in checks:\
   else:\
     print(f'[OK] {path} ({os.path.getsize(path)} bytes)');\
 if not ok:\
-  print('Checkpoint verification failed'); sys.exit(1);\
+  print('Checkpoint verification failed — models will not load'); sys.exit(1);\
 print('All checkpoints verified')\
 "
 
@@ -52,4 +60,4 @@ RUN mkdir -p /app/data && chown -R user:user /app
 USER user
 EXPOSE 7860
 
-CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "7860", "--log-level", "info"]
+CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "7860", "--log-level", "info"]