Update requirements.txt

requirements.txt

@@ -1,3 +1,23 @@
 altair
 pandas
-streamlit
+streamlit
+# Core
+streamlit>=1.32.0
+torch>=2.1.0,<2.4.0          # CPU-only version — auto-installed on Streamlit Cloud
+transformers>=4.38.0,<5.0.0
+accelerate>=0.27.0
+
+# Hugging Face
+huggingface-hub>=0.20.0
+sentence-transformers>=2.5.0
+
+# LangChain + Vector Store
+langchain-huggingface>=0.0.3
+langchain-community>=0.0.30
+faiss-cpu>=1.7.4             # ✅ MUST use faiss-cpu — GPU not available
+
+# Document Loader
+pypdf>=4.0.0
+
+# Optional (for .env support)
+python-dotenv>=1.0.0