Fix warnings and update tracability

src/lib/components/auth/ReauthModal.svelte

@@ -11,10 +11,16 @@
 
   let password = $state("");
   let localError = $state<string | null>(null);
+  let username = $state("User");
+  let serverName = $state("Jellyfin Server");
 
-  const session = auth.getCurrentSession();
-  const username = session?.username ?? "User";
-  const serverName = session?.serverName ?? "Jellyfin Server";
+  // Load session info asynchronously
+  auth.getCurrentSession().then(session => {
+    if (session) {
+      username = session.username ?? "User";
+      serverName = session.serverName ?? "Jellyfin Server";
+    }
+  });
 
   async function handleSubmit(event: Event) {
     event.preventDefault();
@@ -35,15 +41,14 @@
   }
 
   function handleDismiss() {
-    auth.dismissReauth();
     password = "";
     localError = null;
     onDismiss?.();
   }
 
-  function handleBackdropClick(event: MouseEvent) {
+  function handleBackdropClick(event?: MouseEvent) {
     // Don't close on backdrop click - require explicit action
-    event.stopPropagation();
+    event?.stopPropagation();
   }
 </script>