feat: 운영 안정성과 세션 음성 경험 개선

apps/web/e2e/full-sweep-shell.spec.ts

@@ -199,6 +199,54 @@ test.describe("full sweep — shared shell, GNB, and routing guards", () => {
     await expect(page.getByText(BOOT_SCREEN_TEXT)).toHaveCount(0);
   });
 
+  // checklist: shell-stale-chunk-recovery
+  // Pages 배포 전환 뒤 열린 탭의 Vite lazy 청크가 사라진 경우 한 번만 새 문서를
+  // 다시 받고, 정상 렌더 뒤 잠금을 해제한다. 같은 실패가 연속되면 무한 reload하지 않는다.
+  test("reloads once for a stale Vite route chunk without entering a reload loop", async ({
+    page,
+  }) => {
+    let documentRequests = 0;
+    page.on("request", (request) => {
+      if (request.isNavigationRequest()) documentRequests += 1;
+    });
+
+    await page.goto("/login");
+    await expect(page.getByRole("button", { name: /학교 Google 계정으로 계속/ })).toBeVisible();
+    expect(documentRequests).toBe(1);
+
+    const firstPrevented = await page.evaluate(() => {
+      const event = new Event("vite:preloadError", { cancelable: true });
+      Object.assign(event, {
+        payload: new TypeError("Failed to fetch dynamically imported module"),
+      });
+      return !window.dispatchEvent(event);
+    });
+    expect(firstPrevented).toBeTruthy();
+
+    await expect.poll(() => documentRequests).toBe(2);
+    await expect(page.getByRole("button", { name: /학교 Google 계정으로 계속/ })).toBeVisible();
+    await expect
+      .poll(() =>
+        page.evaluate(() => sessionStorage.getItem("vignette:chunk-recovery:/login")),
+      )
+      .toBeNull();
+
+    const secondAttempt = await page.evaluate(() => {
+      sessionStorage.setItem("vignette:chunk-recovery:/login", "reload-attempted");
+      const event = new Event("vite:preloadError", { cancelable: true });
+      Object.assign(event, {
+        payload: new TypeError("Failed to fetch dynamically imported module"),
+      });
+      return {
+        prevented: !window.dispatchEvent(event),
+        marker: sessionStorage.getItem("vignette:chunk-recovery:/login"),
+      };
+    });
+
+    expect(secondAttempt).toEqual({ prevented: false, marker: "reload-attempted" });
+    await expect.poll(() => documentRequests).toBe(2);
+  });
+
   // checklist: shell-guard-pending-approval
   // 미승인(account_status=pending) 사용자는 어떤 보호 경로에서든 /pending으로 회수된다.
   test("redirects a pending-approval user to /pending from any protected route", async ({