Updates

app.py

@@ -165,7 +165,8 @@ if selected_category:
         data=st.session_state.pdf_data if not pdf_disabled else b'',
         file_name="quiz_report.pdf",
         mime="application/pdf",
-        disabled=pdf_disabled
+        disabled=pdf_disabled,
+        key="pdf_download_button"
     )
 
     if selected_module != st.session_state.current_module:
@@ -248,5 +249,6 @@ if submit_button:
             data=st.session_state.pdf_data,
             file_name="quiz_report.pdf",
             mime="application/pdf",
-            disabled=False
+            disabled=False,
+            key="pdf_download_button_updated"
         )