e2e 수정

tests/e2e/form-editor-preview-parity.spec.ts

@@ -55,7 +55,10 @@ test("formInput: 에디터 캔버스와 프리뷰에서 높이/패딩/색상이
     };
   });
 
-  await page.getByRole("link", { name: "프리뷰 열기" }).click();
+  await Promise.all([
+    page.waitForURL(/\/preview/),
+    page.getByRole("link", { name: "프리뷰 열기" }).click(),
+  ]);
   await expect(page.getByRole("heading", { name: "Page Preview" })).toBeVisible();
 
   const previewInput = page.getByRole("textbox", { name: "에디터-프리뷰 인풋" });
@@ -143,7 +146,10 @@ test("formSelect: 에디터 캔버스와 프리뷰에서 높이/패딩/색상이
     };
   });
 
-  await page.getByRole("link", { name: "프리뷰 열기" }).click();
+  await Promise.all([
+    page.waitForURL(/\/preview/),
+    page.getByRole("link", { name: "프리뷰 열기" }).click(),
+  ]);
   await expect(page.getByRole("heading", { name: "Page Preview" })).toBeVisible();
 
   const previewSelect = page.getByRole("combobox", { name: "에디터-프리뷰 셀렉트" });
@@ -255,7 +261,10 @@ test("formCheckbox/formRadio: 에디터 캔버스와 프리뷰에서 그룹 너
     };
   });
 
-  await page.getByRole("link", { name: "프리뷰 열기" }).click();
+  await Promise.all([
+    page.waitForURL(/\/preview/),
+    page.getByRole("link", { name: "프리뷰 열기" }).click(),
+  ]);
   await expect(page.getByRole("heading", { name: "Page Preview" })).toBeVisible();
 
   const previewCheckboxGroup = page.getByTestId("preview-form-checkbox-group").first();