Update app.py: adjust file handling and UI for resume optimization

app.py

@@ -63,6 +63,10 @@ def process_resume(openai_api_key, serper_api_key, model_choice, new_resume, com
     if new_resume is None or not (hasattr(new_resume, "name") and new_resume.name.strip() != ""):
         return ("Error: Please upload a resume.", None, None, None, None, None, None)
     
+    # -- [MINIMAL CHANGE] -- Set environment variables so CrewAI sees these keys
+    os.environ["OPENAI_API_KEY"] = openai_api_key or ""
+    os.environ["SERPER_API_KEY"] = serper_api_key or ""
+
     # --- Save the uploaded file into "knowledge" directory ---
     if hasattr(new_resume, "read"):
         original_filename = os.path.basename(new_resume.name)