fix: remove invalid browser type syntax

src/server/request-handler.ts

@@ -630,7 +630,7 @@ function htmlPage(): string {
               isCollection
             };
           })
-          .filter((entry): entry is ShareListingEntry => entry !== null);
+          .filter((entry) => entry !== null);
 
         return entries.filter((entry) => {
             const resolved = entry.href.toLowerCase();