websocket cursor data broadcast

src/routes/+layout.svelte

@@ -1,5 +1,23 @@
 <script>
+    import { browser } from '$app/environment';
+    import { onMount, onDestroy } from 'svelte';
+    import { initCursorTracking, stopCursorTracking } from '../events/cursor';
+
     let { children } = $props();
+    if (browser) {
+      onMount(async () => {
+        try {
+          await initCursorTracking();
+        } catch (err) {
+          console.error("[Scene] Failed to initialize cursor tracking:", err);
+        }
+      });
+
+      onDestroy(() => {
+        stopCursorTracking();
+      });
+    }
+
 </script>
 
 <div class="size-full bg-transparent">