fix(router): keep html entrypoints working

p/assets/main-nav/app.js

@@ -1,9 +1,14 @@
 (() => {
   const main = document.getElementById("app-main");
+  const footerYear = document.getElementById("footer-year");
   const pageStyleSelectors = "[data-page-style='true']";
 
   const links = Array.from(document.querySelectorAll("[data-route]"));
 
+  if (footerYear) {
+    footerYear.textContent = new Date().getFullYear().toString();
+  }
+
   function clearInjectedPageStyles() {
     document.querySelectorAll(pageStyleSelectors).forEach((node) => node.remove());
   }
@@ -59,6 +64,10 @@
 
     const path = window.location.pathname.replace(/^\/+|\/+$/g, "");
     if (path) {
+      if (path.endsWith(".html")) {
+        return "index";
+      }
+
       const parts = path.split("/");
       if (parts[0] === "p" && parts[1]) {
         return normalizeRoute(parts.slice(1).join("/"));