Update JupyterLab installation command and loop syntax

start.sh

@@ -755,7 +755,7 @@ export PATH="$HOME/.local/bin:$PATH"
 # Runtime install fallback: only attempt if DEV_MODE is enabled but install failed during build
 if [ "$DEV_MODE_ENABLED" = "true" ] && ! python3 -c "import jupyterlab" >/dev/null 2>&1; then
   echo "DEV_MODE enabled but jupyter-lab is missing; attempting runtime install..."
-  if python3 -m pip install --user --no-cache-dir --break-system-packages jupyterlab==4.5.7 tornado==6.5.5 ipywidgets==8.1.8; then
+  if python3 -m pip install --user --no-cache-dir --break-system-packages "jupyterlab>=4.2,<5" "tornado>=6.3" "ipywidgets>=8.1"; then
     echo "Runtime Jupyter install complete."
   else
     echo "WARNING: Runtime Jupyter install failed; disabling terminal for this boot."