fix: use redirect instead

src/client/app/router.ts

@@ -42,12 +42,9 @@ export function createRouter(
   function go(href: string = inBrowser ? location.href : '/') {
     // ensure correct deep link so page refresh lands on correct files.
     const url = new URL(href, fakeHost)
-    if (
-      !url.pathname.endsWith('/') &&
-      !url.pathname.endsWith('.html') &&
-      url.pathname + '/' !== siteDataRef.value.base
-    ) {
-      url.pathname += '.html'
+    if (!url.pathname.endsWith('/') && !url.pathname.endsWith('.html')) {
+      url.pathname +=
+        url.pathname + '/' === siteDataRef.value.base ? '/' : '.html'
       href = url.pathname + url.search + url.hash
     }
     if (inBrowser) {