feat(ui,isotest): Group disabled displays into a collapsible section and refactor display item rendering; start a background screenshot loop during isotest and improve test-run cleanup

isotest/run-test.sh

@@ -63,6 +63,12 @@ fi
 cleanup() {
     echo ""
     echo "Shutting down..."
+    if [ -n "$SCREENSHOT_LOOP_PID" ] && kill -0 "$SCREENSHOT_LOOP_PID" 2>/dev/null; then
+        kill "$SCREENSHOT_LOOP_PID" 2>/dev/null || true
+    fi
+    if [ -n "$ENABLE_PID" ] && kill -0 "$ENABLE_PID" 2>/dev/null; then
+        kill "$ENABLE_PID" 2>/dev/null || true
+    fi
     if [ -n "$VIEWER_PID" ] && kill -0 "$VIEWER_PID" 2>/dev/null; then
         kill "$VIEWER_PID" 2>/dev/null || true
     fi
@@ -212,11 +218,15 @@ if [ -f "$SCRIPT_DIR/enable-displays.py" ]; then
 fi
 
 echo "Tips:"
-echo "  - pnpm run test:screenshot  - Take screenshot"
 echo "  - http://localhost:3006     - Management UI"
 echo "  - socat - UNIX-CONNECT:.nogit/vm/serial.sock  - Serial console (login: ecouser/ecouser)"
 echo ""
 
+# Start screenshot loop in background (takes screenshots every 5 seconds)
+echo "Starting screenshot loop..."
+(while true; do "$SCRIPT_DIR/screenshot.sh" 2>/dev/null; sleep 5; done) &
+SCREENSHOT_LOOP_PID=$!
+
 if [ "$AUTO_MODE" = true ]; then
     echo "=== Auto mode: waiting for display setup ==="