feat(v2): complete v2 reimplementation

frontend/vitest.config.ts

@@ -0,0 +1,16 @@
+import { mergeConfig } from "vite";
+import { defineConfig } from "vitest/config";
+
+import viteConfig from "./vite.config";
+
+export default mergeConfig(
+	viteConfig,
+	defineConfig({
+		test: {
+			environment: "jsdom",
+			include: ["src/**/*.test.{ts,tsx}"],
+			exclude: ["e2e/**", "node_modules/**"],
+			setupFiles: ["./src/test/setup.ts"],
+		},
+	}),
+);