Fix filtering by username bug

src/main.js

@@ -220,7 +220,7 @@ Alpine.data('bookmeterList', function () {
                 .filter(i => {
                     if (this.advancedSearch) {
                         return (
-                            (!this.username || i._username.includes(this.username)) &&
+                            (!this.username || i._username.includes(username)) &&
                             (!this.title || i._title.includes(title)) &&
                             (!this.author || i._author.includes(author)) &&
                             (!this.publisher || i._publisher.includes(publisher))