fix: prevent navbar from appearing above modals

Author: Miss Miller

app/components/navbar.tsx

@@ -74,7 +74,7 @@ export default function Navbar() {
   };
 
   return (
-    <header className="relative z-50 px-4 pt-4 sm:px-6 w-full">
+    <header className="relative px-4 pt-4 sm:px-6 w-full">
       <div className="mx-auto max-w-6xl">
         <div
           ref={shellRef}