Enhance submission logging and error handling

app.py

@@ -80,6 +80,7 @@ def run_and_submit_all(profile: gr.OAuthProfile | None):
     if NO_SUBMIT:
         return f"Submission SKIPPED (NO_SUBMIT=True). {len(answers_payload)} answers prepared.", results_df
     print(f"Submitting {len(answers_payload)} answers to: {SUBMIT_URL}")
+    print("Submitting data:", json.dumps(submission_data, indent=2))
     try:
         response = requests.post(
             SUBMIT_URL, json=submission_data, timeout=max(60, len(answers_payload) * 2))
@@ -237,6 +238,8 @@ def submit_current_results_action(profile: gr.OAuthProfile | None, results_log_l
         return f"Submission SKIPPED. {len(answers_payload)} answers ready."
 
     gr.Info(f"Submitting {len(answers_payload)} answers for '{username}'...")
+    print("Submitting data:", json.dumps(submission_data, indent=2))
+
     try:
         response = requests.post(
             SUBMIT_URL, json=submission_data, timeout=max(60, len(answers_payload)*2))
@@ -244,8 +247,16 @@ def submit_current_results_action(profile: gr.OAuthProfile | None, results_log_l
         result_data = response.json()
         return (f"Submission Successful! User: {result_data.get('username')}, Score: {result_data.get('score', 'N/A')}% "
                 f"({result_data.get('correct_count', '?')}/{result_data.get('total_attempted', '?')}), Msg: {result_data.get('message', '')}")
-    except Exception as e:
-        return f"Submission Failed: {e}"
+    except requests.exceptions.HTTPError as e:
+        error_detail = f"Server responded with status {e.response.status_code}."
+        try:
+            error_json = e.response.json()  # This is key
+            error_detail += f" Detail: {error_json.get('detail', e.response.text if e.response else 'No response text')}"
+        except requests.exceptions.JSONDecodeError:
+            error_detail += f" Response: {e.response.text[:500] if e.response else 'No response text'}"
+        status_message = f"Submission Failed: {error_detail}"
+        gr.Error(status_message)
+        return status_message
 
 
 # --- Build Gradio Interface ---