Fix importlib import, remove subtitle

app.py

@@ -4,7 +4,7 @@ Runs the actual task scripts and displays their real outputs.
 NCI MSCAI | Fundamentals of AI TABA 2026
 """
 
-import sys, io, os, math, heapq, time
+import sys, io, os, math, heapq, time, importlib.util
 from contextlib import redirect_stdout
 from collections import deque
 
@@ -98,10 +98,7 @@ with st.sidebar:
     st.caption("All outputs in Tasks 2–5 are generated by running the actual task Python scripts.")
 
 # ── header ────────────────────────────────────────────────────────────────────
-st.markdown("<h2 style='margin:0 0 4px;color:#1e293b'>EcoCart AI System</h2>",
-            unsafe_allow_html=True)
-st.markdown("<p style='color:#64748b;font-size:.85rem;margin:0 0 16px'>"
-            "An AI-powered logistics solution — NCI MSCAI Fundamentals of AI 2026</p>",
+st.markdown("<h2 style='margin:0 0 16px;color:#1e293b'>EcoCart AI System</h2>",
             unsafe_allow_html=True)
 
 T1, T2, T3, T4, T5, T6 = st.tabs([