Fix: set cache dirs to avoid permission errors in Spaces

app/model.py

@@ -1,6 +1,10 @@
-from transformers import AutoModelForSequenceClassification, AutoTokenizer, pipeline
 import os
+# Avoid cache write permission errors in Hugging Face Spaces
+os.environ["HF_HOME"] = "/tmp/huggingface"
+os.environ["TRANSFORMERS_CACHE"] = "/tmp/huggingface/transformers"
+os.environ["HF_DATASETS_CACHE"] = "/tmp/huggingface/datasets"
 import re
+from transformers import AutoModelForSequenceClassification, AutoTokenizer, pipeline
 
 class CancerClassifier:
     def __init__(self, model_path="user1729/BiomedBERT-cancer-bert-classifier-v1.0"):