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

node_modules/astro/dist/env/constants.js

@@ -0,0 +1,17 @@
+const VIRTUAL_MODULES_IDS = {
+  client: "astro:env/client",
+  server: "astro:env/server",
+  internal: "virtual:astro:env/internal"
+};
+const VIRTUAL_MODULES_IDS_VALUES = new Set(Object.values(VIRTUAL_MODULES_IDS));
+const ENV_TYPES_FILE = "env.d.ts";
+const PKG_BASE = new URL("../../", import.meta.url);
+const MODULE_TEMPLATE_URL = new URL("templates/env/module.mjs", PKG_BASE);
+const TYPES_TEMPLATE_URL = new URL("templates/env/types.d.ts", PKG_BASE);
+export {
+  ENV_TYPES_FILE,
+  MODULE_TEMPLATE_URL,
+  TYPES_TEMPLATE_URL,
+  VIRTUAL_MODULES_IDS,
+  VIRTUAL_MODULES_IDS_VALUES
+};