feat: Migrate more to VueV3 logic, navbar improvements

src/App.vue

@@ -1,8 +1,20 @@
 <script setup>
+  import { onMounted } from 'vue';
   import { Router, text } from "./lib/index.js";
   import { routes } from "./routes/index.js";
   import Navbar from "./layout/Navbar.vue";
   import Footer from "./layout/Footer.vue";
+
+  // Handle redirect from 404 page (replaces inline script in index.html)
+  onMounted(() => {
+    if (typeof window !== 'undefined') {
+      const redirect = sessionStorage.redirect;
+      if (redirect && redirect !== window.location.href) {
+        window.history.replaceState(null, null, redirect);
+      }
+      delete sessionStorage.redirect;
+    }
+  });
 </script>
 
 <template>