Migrate Cypress E2E from cy.intercept to MSW service worker

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/main.ts

@@ -104,8 +104,12 @@ app.directive("tooltip", Tooltip);
  */
 async function enableMocking() {
   if (import.meta.env.VITE_MSW !== "true") return;
+  const { http, HttpResponse } = await import("msw");
   const { worker } = await import("./mocks/browser.js");
   await worker.start({ onUnhandledRequest: "bypass" });
+  // Expose on window so Cypress can add per-test overrides
+  window.__mswWorker__ = worker;
+  window.__msw__ = { http, HttpResponse };
 }
 
 enableMocking().then(() => app.mount("#app"));