Update app.py to integrate text generation pipeline into ConversationChain initialization, enhancing conversation capabilities.

app.py

@@ -73,7 +73,7 @@ if access_token:
     @st.cache_resource
     def initialize_chain():
         memory = ConversationBufferMemory()
-        return ConversationChain(llm=None, memory=memory)  # No LLM; handled by pipeline
+        return ConversationChain(llm=text_gen_pipeline, memory=memory)  # No LLM; handled by pipeline
 
     conversation_chain = initialize_chain()