Update requirements.txt

requirements.txt

@@ -1,3 +1,21 @@
-altair
-pandas
-streamlit
+# --- Core App Framework ---
+streamlit>=1.38.0
+python-dotenv>=1.0.1
+
+# --- PDF Parsing ---
+PyPDF2>=3.0.1
+
+# --- Numerical & Machine Learning ---
+numpy>=1.26.4
+scikit-learn>=1.5.2
+
+# --- Local Embeddings / Hugging Face Integration ---
+sentence-transformers>=3.0.1
+huggingface-hub>=0.25.0
+requests>=2.32.3
+
+# --- Vector Search (Fast Indexing) ---
+faiss-cpu>=1.8.0
+
+# --- Chat Interface ---
+streamlit-chat>=0.1.1