Move to onDestroy

https://svelte.dev/docs/svelte/lifecycle-hooks

src/routes/(admin)/account/+layout.svelte

@@ -1,24 +1,25 @@
 <script lang="ts">
-  import { run } from "svelte/legacy"
-
   import { invalidate } from "$app/navigation"
-  import { onMount } from "svelte"
+  import { onMount, onDestroy } from "svelte"
 
   let { data, children } = $props()
 
   let { supabase, session } = $state(data)
-  run(() => {
-    ;({ supabase, session } = data)
-  })
 
   onMount(() => {
-    const { data } = supabase.auth.onAuthStateChange((event, _session) => {
-      if (_session?.expires_at !== session?.expires_at) {
-        invalidate("supabase:auth")
-      }
-    })
+    ;({ supabase, session } = data)
+
+    const { data: authData } = supabase.auth.onAuthStateChange(
+      (event, _session) => {
+        if (_session?.expires_at !== session?.expires_at) {
+          invalidate("supabase:auth")
+        }
+      },
+    )
 
-    return () => data.subscription.unsubscribe()
+    onDestroy(() => {
+      authData.subscription.unsubscribe()
+    })
   })
 </script>