Refactor routing in App component to enhance navigation and improve error handling by integrating dynamic routes and updating the NotFound route.

node_modules/@astrojs/markdown-remark/dist/frontmatter-injection.js

@@ -0,0 +1,31 @@
+function isValidAstroData(obj) {
+  if (typeof obj === "object" && obj !== null && obj.hasOwnProperty("frontmatter")) {
+    const { frontmatter } = obj;
+    try {
+      JSON.stringify(frontmatter);
+    } catch {
+      return false;
+    }
+    return typeof frontmatter === "object" && frontmatter !== null;
+  }
+  return false;
+}
+class InvalidAstroDataError extends TypeError {
+}
+function safelyGetAstroData(vfileData) {
+  const { astro } = vfileData;
+  if (!astro || !isValidAstroData(astro)) {
+    return new InvalidAstroDataError();
+  }
+  return astro;
+}
+function setVfileFrontmatter(vfile, frontmatter) {
+  vfile.data ??= {};
+  vfile.data.astro ??= {};
+  vfile.data.astro.frontmatter = frontmatter;
+}
+export {
+  InvalidAstroDataError,
+  safelyGetAstroData,
+  setVfileFrontmatter
+};