UPD: initial architecture

vitest.config.ts

@@ -0,0 +1,11 @@
+import { defineConfig } from "vitest/config";
+import path from "node:path";
+export default defineConfig({
+  test: {
+    environment: "jsdom",
+    setupFiles: ["./src/test/setup.ts"],
+    include: ["src/**/*.test.{ts,tsx}"],
+    coverage: { provider: "v8", reporter: ["text", "html"] },
+  },
+  resolve: { alias: { "@": path.resolve(__dirname, "./src") } },
+});