Update app.py

app.py

@@ -534,20 +534,24 @@ def get_footer_message(user_query):
 @st.cache_resource
 def load_index():
     """Load or create the knowledge base index"""
+
+    # ✔ NEW GLOBAL SETTINGS (instead of deprecated ServiceContext)
+    Settings.llm = LlamaOpenAI(model="gpt-4-turbo")
+    Settings.embed_model = OpenAIEmbedding(model="text-embedding-3-small")
+
+    # Load existing index if storage exists
     if os.path.exists("./storage"):
         storage_context = StorageContext.from_defaults(persist_dir="./storage")
         return load_index_from_storage(storage_context)
-    
+
+    # Build new index if storage not present
     docs = SimpleDirectoryReader(input_files=["time_to_rethink_trust_book (3).md"]).load_data()
-    embed_model = OpenAIEmbedding(model="text-embedding-3-small")
-    service_context = ServiceContext.from_defaults(
-        llm=LlamaOpenAI(model="gpt-4-turbo"),
-        embed_model=embed_model
-    )
-    index = VectorStoreIndex.from_documents(docs, service_context=service_context)
+    index = VectorStoreIndex.from_documents(docs)
+
     index.storage_context.persist(persist_dir="./storage")
     return index
 
+
 # ---------- INITIALIZE SERVICES ----------
 index = load_index()
 tavily = TavilyClient(api_key=os.getenv("TAVILY_API_KEY"))