fix(e2e): 成片库页面验证改用getByPlaceholder替代heading，避免图标导致accessible name计算问题

apps/web/e2e/core-generation.spec.ts

@@ -229,9 +229,11 @@ test.describe("Core generation flow", () => {
     // If we see progress or result, great; if not, flow still reached the end
     // which is sufficient for an E2E smoke test
 
-    // Verify product library page loads
+    // Verify product library page loads (smoke: just verify page renders)
     await page.goto("/app/products");
-    await expect(page.getByRole("heading", { name: /成片库/ })).toBeVisible({
+    await expect(page).toHaveURL(/\/app\/products/);
+    // Verify search input exists = page rendered correctly (more reliable than heading with icon)
+    await expect(page.getByPlaceholder("搜索成片名称...")).toBeVisible({
       timeout: 15_000,
     });
   });