Update app.py

app.py

@@ -1,10 +1,10 @@
 import gradio as gr
 
 # ✅ Use langchain_community imports
-from langchain.text_splitter import CharacterTextSplitter
+from langchain.text_splitter import CharacterTextSplitter   # stays in main langchain
 from langchain_community.embeddings import HuggingFaceEmbeddings
 from langchain_community.vectorstores import FAISS
-from langchain_community.chains import ConversationalRetrievalChain
+from langchain.chains import ConversationalRetrievalChain    # stays in main langchain
 from langchain_community.llms import HuggingFaceHub
 from langchain_community.document_loaders import PyPDFLoader