Update app.py

app.py

@@ -26,7 +26,7 @@ from openai import OpenAI
 # =============================
 # Globals & Config
 # =============================
-api_key_env = os.getenv("OPENAI_API_KEY", "").strip()
+api_key_env = None
 
 ds: List[torch.Tensor] = []     # page embeddings
 images: List[Image.Image] = []  # PIL images in page order
@@ -349,6 +349,8 @@ def stream_agent(question: str,
         yield "⚠️ **Please provide your OpenAI API key.**", "", ""
         return
 
+    api_key_env=api_key
+
     if not images or not ds:
         yield "⚠️ **Index a PDF first in tab 1.**", "", ""
         return