Fix Hugging Face cache path configuration for Spaces

- Add environment-aware cache path setup in config.py
- Auto-detect HF Spaces and use default cache (not /Volumes/extssd)
- Initialize config early in app.py to set paths before model imports
- Remove .env from repository (local development only)
- Add .env to .gitignore to prevent future commits

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

.env

@@ -1,8 +0,0 @@
-# Hugging Face Configuration
-# Point Hugging Face cache to external SSD using official environment variables
-# This will create /Volumes/extssd/huggingface/hub and /Volumes/extssd/huggingface/datasets
-HF_HOME=/Volumes/extssd/huggingface
-
-# Model configuration (keep existing values)
-MODEL_ID=stabilityai/stable-diffusion-xl-base-1.0
-

.gitignore

@@ -1,4 +1,5 @@
 training_data/
 .DS_Store
 __pycache__/
-*.pyc
+*.pyc
+.env

app.py

@@ -18,6 +18,11 @@ src_path = os.path.join(os.path.dirname(os.path.abspath(__file__)), "src")
 if src_path not in sys.path:
     sys.path.insert(0, src_path)
 
+# Initialize config early to setup cache paths before model imports
+from core.config import config
+print(f"🔧 Environment: {'HF Spaces' if config.is_hf_spaces else 'Local'}")
+print(f"🔧 Device: {config.device}, dtype: {config.dtype}")
+
 from ui.french_style.french_style_tab import FrenchStyleTab
 from ui.generate.generate_tab import GenerateTab
 from ui.identify.identify_tab import IdentifyTab

src/core/config.py

@@ -14,6 +14,7 @@ class AppConfig:
         self.model_id = DEFAULT_MODEL_ID
         # Auto-detect Hugging Face Spaces environment
         self.is_hf_spaces = os.getenv("SPACE_ID") is not None
+        self._setup_cache_paths()
         
     def _setup_device(self):
         """Setup device configuration for PyTorch."""
@@ -29,6 +30,24 @@ class AppConfig:
             self.device = "cpu"
             self.dtype = torch.float32
             self.clf_device = -1
+    
+    def _setup_cache_paths(self):
+        """Setup cache paths based on environment."""
+        if self.is_hf_spaces:
+            # On HF Spaces, don't set HF_HOME - let it use default cache
+            if "HF_HOME" in os.environ:
+                del os.environ["HF_HOME"]
+            print("🏠 Using default Hugging Face cache on Spaces")
+        else:
+            # Local development - use external SSD if configured
+            local_hf_home = "/Volumes/extssd/huggingface"
+            if os.path.exists("/Volumes/extssd") and not os.getenv("HF_HOME"):
+                os.environ["HF_HOME"] = local_hf_home
+                print(f"🏠 Using external SSD cache: {local_hf_home}")
+            elif os.getenv("HF_HOME"):
+                print(f"🏠 Using configured HF_HOME: {os.getenv('HF_HOME')}")
+            else:
+                print("🏠 Using default Hugging Face cache")
         
     @property
     def is_cuda_available(self):