Update app.py

app.py

@@ -21,6 +21,11 @@ from langchain_core.runnables import RunnablePassthrough
 from reportlab.platypus import SimpleDocTemplate, Paragraph
 from reportlab.lib.styles import getSampleStyleSheet
 
+# ================================
+# Constants / Config
+# ================================
+VECTORSTORE_PATH = "vectorstore"
+
 # --------------------------------------------------
 # PAGE CONFIG
 # --------------------------------------------------
@@ -85,12 +90,15 @@ with col2:
 # LOAD VECTOR STORE
 # --------------------------------------------------
 @st.cache_resource
+from langchain_community.embeddings import HuggingFaceEmbeddings
+from langchain_community.vectorstores import FAISS
+
 def load_vectorstore():
     embeddings = HuggingFaceEmbeddings(
         model_name="sentence-transformers/all-MiniLM-L6-v2"
     )
     return FAISS.load_local(
-        "vectorstore",
+        VECTORSTORE_PATH,
         embeddings,
         allow_dangerous_deserialization=True
     )