Update app.py

app.py

@@ -202,13 +202,18 @@ else:
 if st.button("Random Selection"):
     st.session_state.start_node = random.choice(list(G.nodes))
 
-# Input: Starting node
-start_node = st.number_input(
+start_node = st.text_input(
     "Enter the starting node ID:",
-    value=st.session_state.start_node,
-    step=1
+    value=str(st.session_state.start_node)
 )
 
+try:
+    start_node = int(start_node)
+except ValueError:
+    st.error("Please enter a valid numeric content ID.")
+    st.stop()
+
+
 # Input: Student ID
 student_id = st.text_input("Enter a student ID (optional):", value="")