chore: root cleanup

vitest.setup.ts

@@ -1,8 +1,5 @@
 import { afterEach, vi } from "vitest";
 
-// jsdom does not implement matchMedia; provide a minimal stub so hooks that
-// read media queries (e.g. useIsMobile) can run. Individual tests override
-// window.innerWidth / matchMedia as needed.
 if (typeof window !== "undefined" && !window.matchMedia) {
   window.matchMedia = vi.fn().mockImplementation((query: string) => ({
     matches: false,