fix: 修复 ticket-system/index.html 无效 HTML（CSS 代码泄漏到 body 外）

Co-authored-by: qinfendebingshuo <207279273+qinfendebingshuo@users.noreply.github.com>
Agent-Logs-Url: https://github.com/qinfendebingshuo/guanghulab/sessions/2b0b1a22-c312-4b46-ae3b-72e830c4470b

docs/ticket-system/index.html

@@ -805,5 +805,5 @@
             document.getElementById('reset-btn').addEventListener('click', resetToDefault);
         });
     </script>
-background: linear-gradient(135deg, #0a1628 0%, #1a2a4a 50%, #0d1f3c 100%);</body>
+</body>
 </html>