🔧 Refactor app.py: remove login button and simplify run function

app.py

@@ -34,14 +34,9 @@ def run_and_submit_all(profile: gr.OAuthProfile | None):
     and displays the results.
     """
     # Determine HF Space Runtime URL and Repo URL
-    space_id = os.getenv("SPACE_ID")
-
-    if profile:
-        username = profile.username
-        print(f"User logged in: {username}")
-    else:
-        print("User not logged in.")
-        return "Please Login to Hugging Face with the button.", None
+    space_id = os.getenv("SPACE_ID", "unknown_space")
+    username = os.getenv("HF_USER", "anonymous")
+    print(f"Running as user: {username}")
 
     api_url = DEFAULT_API_URL
     questions_url = f"{api_url}/questions"
@@ -114,19 +109,15 @@ with gr.Blocks() as demo:
         """
         **Instructions:**
 
-        1. Log in with your Hugging Face account using the button below.
-        2. Click 'Run Evaluation & Submit All Answers' to fetch, run, and submit.
+        Click 'Run Evaluation & Submit All Answers' to fetch, run the agent, and submit.
         """
     )
-
-    login_btn = gr.LoginButton()
     run_button = gr.Button("Run Evaluation & Submit All Answers")
     status_output = gr.Textbox(label="Run Status / Submission Result", lines=5, interactive=False)
     results_table = gr.DataFrame(label="Questions and Agent Answers", wrap=True)
 
     run_button.click(
         fn=run_and_submit_all,
-        inputs=[login_btn],
         outputs=[status_output, results_table]
     )