Remove .html from internal links

scripts/audit-static-links.mjs

@@ -4,6 +4,7 @@ import path from "node:path";
 const repoRoot = process.cwd();
 const distRoot = path.join(repoRoot, "dist");
 const htmlAttributes = ["href", "src", "poster", "action"];
+const internalHosts = new Set(["familyfed.ie", "www.familyfed.ie", "familyfed.bcgen.ie"]);
 const assetExtensions = new Set([
   ".avif",
   ".css",
@@ -98,6 +99,15 @@ function listFiles(dir) {
 }
 
 function checkReference({ sourceFile, rawReference, sourceKind }) {
+  if ((sourceKind === "href" || sourceKind === "action") && isInternalHtmlPageReference(rawReference)) {
+    problems.push({
+      sourceFile,
+      sourceKind,
+      rawReference,
+      reason: "internal page links should omit the .html extension",
+    });
+  }
+
   const reference = normalizeReference(rawReference);
 
   if (!reference) {
@@ -140,6 +150,33 @@ function checkReference({ sourceFile, rawReference, sourceKind }) {
   return 1;
 }
 
+function isInternalHtmlPageReference(rawReference) {
+  const trimmed = rawReference.trim();
+  if (
+    trimmed === "" ||
+    trimmed.startsWith("#") ||
+    trimmed.startsWith("data:") ||
+    trimmed.startsWith("blob:") ||
+    trimmed.startsWith("//") ||
+    trimmed.startsWith("?")
+  ) {
+    return false;
+  }
+
+  const absoluteMatch = trimmed.match(/^https?:\/\/([^/?#]+)([^?#]*)(?:[?#].*)?$/i);
+  if (absoluteMatch) {
+    const [, host, pathname] = absoluteMatch;
+    return internalHosts.has(host.toLowerCase()) && pathname.toLowerCase().endsWith(".html");
+  }
+
+  if (ignoredProtocols.test(trimmed)) {
+    return false;
+  }
+
+  const pathname = trimmed.split("#")[0].split("?")[0];
+  return pathname.toLowerCase().endsWith(".html");
+}
+
 function normalizeReference(rawReference) {
   if (!rawReference) {
     return "";