Fix LLM check - remove incorrect model attribute check

main.py

@@ -408,7 +408,7 @@ class RAGSystem:
                 logger.info("📝 No relevant documents found, using LLM for direct conversation")
                 
                 # Use LLM for general conversation
-                if self.llm and hasattr(self.llm, 'model') and self.llm.model:
+                if self.llm:
                     prompt = f"""You're a helpful, smart, and friendly AI assistant. Answer the user's question naturally and conversationally.
 
 Question: {question}
@@ -444,7 +444,7 @@ Answer:"""
                 scores.append(float(score))
             
             # Generate answer using LLM with document context (RAG mode)
-            if self.llm and hasattr(self.llm, 'model') and self.llm.model:
+            if self.llm:
                 context_text = "\n\n".join(contexts)
                 prompt = f"""You're a helpful AI assistant. Answer the user's question based on the context provided below.