Update page title in WebSocket interface for improved clarity

main.py

@@ -98,7 +98,7 @@ async def get_test_page():
         <!DOCTYPE html>
 <html>
 <head>
-    <title>WebSocket Notification Service - Test Interface</title>
+    <title>WebSocket Notification Service - Interface</title>
     <style>
         * {
             margin: 0;