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/vite-plugin-astro-server/error.d.ts

@@ -0,0 +1,7 @@
+import type { AstroConfig } from '../@types/astro.js';
+import type { ModuleLoader } from '../core/module-loader/index.js';
+import type { DevPipeline } from './pipeline.js';
+export declare function recordServerError(loader: ModuleLoader, config: AstroConfig, { logger }: DevPipeline, _err: unknown): {
+    error: Error;
+    errorWithMetadata: import("../core/errors/errors.js").ErrorWithMetadata;
+};