MAESTRO: scaffold frontend tooling and config

frontend/vitest.config.ts

@@ -0,0 +1,9 @@
+import { defineConfig } from "vitest/config";
+
+export default defineConfig({
+  test: {
+    environment: "jsdom",
+    globals: true,
+    exclude: ["**/e2e/**", "**/node_modules/**", "**/.next/**", "**/dist/**"],
+  },
+});