Update src/streamlit_app.py

src/streamlit_app.py

@@ -5,8 +5,7 @@ from langchain.memory import ConversationBufferMemory
 import os
 
 # Set OpenRouter API Key and Base URL
-os.environ["OPENAI_API_KEY"] = st.secrets["OPENAI_API_KEY"]
-os.environ['OPENAI_API_BASE'] = 'https://openrouter.ai/api/v1'
+OPENAI_API_KEY = os.environ.get("OPENAI_API_KEY")
 
 if not api_key:
     st.error("API key not found. Please set OPENAI_API_KEY in Space secrets.")
@@ -16,7 +15,8 @@ if not api_key:
 llm = ChatOpenAI(
     temperature=0.7,
     model_name="deepseek/deepseek-chat-v3-0324:free",
-    openai_api_key=api_key,
+    openai_api_key=OPENAI_API_KEY,
+    openai_api_base="https://openrouter.ai/api/v1"
 )
 
 # Set up memory