fix: Change port to 8080 to avoid address in use error

system_monitor_overlay/system_monitor.html

@@ -37,7 +37,7 @@
 
     <script>
         function fetchStats() {
-            fetch('http://localhost:8000/stats')
+            fetch('http://localhost:8080/stats')
                 .then(response => response.json())
                 .then(data => {
                     document.getElementById('cpu-usage').textContent = `${data.cpu_percent}%`;