Fix Dockerfile Python one-liner syntax error

- Create download_weights.py script instead of inline Python
- Update Dockerfile to use script (cleaner and avoids syntax errors)
- Copy estimator.py in Dockerfile

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Dockerfile

@@ -49,26 +49,14 @@ RUN bash build_all.sh || echo "⚠️  Build completed with warnings"
 
 # Copy application files
 WORKDIR /app
-COPY app.py client.py ./
+COPY app.py client.py estimator.py download_weights.py ./
 
 # Create weights directory
 RUN mkdir -p weights
 
 # Download weights if USE_HF_WEIGHTS=true (optional at build time)
 # Weights can also be downloaded at runtime
-RUN python3 -c "import os; \
-from pathlib import Path; \
-from huggingface_hub import snapshot_download; \
-repo = os.environ.get('FOUNDATIONPOSE_MODEL_REPO', 'gpue/foundationpose-weights'); \
-token = os.environ.get('HF_TOKEN'); \
-use_hf = os.environ.get('USE_HF_WEIGHTS', 'false').lower() == 'true'; \
-use_real = os.environ.get('USE_REAL_MODEL', 'false').lower() == 'true'; \
-if use_hf and use_real: \
-    print(f'Downloading weights from {repo}...'); \
-    snapshot_download(repo_id=repo, local_dir='weights', token=token, repo_type='model'); \
-    print('✓ Weights downloaded'); \
-else: \
-    print('Placeholder mode - skipping weights')" || echo "⚠️  Weight download skipped"
+RUN python3 download_weights.py || echo "⚠️  Weight download skipped"
 
 # Expose Gradio port
 EXPOSE 7860

download_weights.py

@@ -0,0 +1,32 @@
+#!/usr/bin/env python3
+"""Download model weights from HuggingFace model repository."""
+
+import os
+from pathlib import Path
+
+# Check environment variables
+repo = os.environ.get('FOUNDATIONPOSE_MODEL_REPO', 'gpue/foundationpose-weights')
+token = os.environ.get('HF_TOKEN')
+use_hf = os.environ.get('USE_HF_WEIGHTS', 'false').lower() == 'true'
+use_real = os.environ.get('USE_REAL_MODEL', 'false').lower() == 'true'
+
+if use_hf and use_real:
+    print(f'Downloading weights from {repo}...')
+
+    try:
+        from huggingface_hub import snapshot_download
+
+        snapshot_download(
+            repo_id=repo,
+            local_dir='weights',
+            token=token,
+            repo_type='model'
+        )
+
+        print('✓ Weights downloaded successfully')
+    except Exception as e:
+        print(f'⚠️  Weight download failed: {e}')
+        print('Space will run in placeholder mode')
+else:
+    print('Placeholder mode - skipping weight download')
+    print('Set USE_REAL_MODEL=true and USE_HF_WEIGHTS=true to enable')