Fix Admin UI status detection to catch port binding errors

- Increase sleep time to 2 seconds to allow error detection
- Check log file for 'Address already in use' error
- Show helpful message to run --kill-ports when port is in use
- Kill the failed process to prevent zombie processes

scripts/run.sh

@@ -146,10 +146,19 @@ if ! command -v trunk &> /dev/null; then
 else
     trunk serve --port "$ADMIN_UI_PORT" > /tmp/supervisor-ui.log 2>&1 &
     ADMIN_UI_PID=$!
-    sleep 1
+    sleep 2
+    
+    # Check if process is still running
     if ps -p $ADMIN_UI_PID > /dev/null 2>&1; then
-        echo "✅"
-        UI_STARTED=true
+        # Check for port binding errors in log
+        if grep -q "Address already in use" /tmp/supervisor-ui.log 2>/dev/null; then
+            echo "❌"
+            UI_ERROR="Port $ADMIN_UI_PORT already in use. Run: ./scripts/run.sh --kill-ports"
+            kill $ADMIN_UI_PID 2>/dev/null
+        else
+            echo "✅"
+            UI_STARTED=true
+        fi
     else
         echo "❌"
         UI_ERROR="Failed to start"