feat(e2e): 优化测试配置并增强富文本编辑器测试

refactor(cases): 更新案例数据结构字段
test(admin): 增加富文本编辑器多种格式测试
fix(contact-form): 修复表单提交测试并移除skip标记
perf(smart-wait): 改进页面就绪等待逻辑
ci(playwright): 调整firefox配置并优化全局setup

src/app/(marketing)/cases/[id]/client.tsx

@@ -14,8 +14,8 @@ interface CaseItem {
   content: string;
   category: string;
   slug: string;
-  publishedAt?: string;
-  createdAt: string;
+  date: string;
+  image?: string;
 }
 
 interface CaseDetailClientProps {
@@ -223,7 +223,7 @@ export function CaseDetailClient({ caseItem }: CaseDetailClientProps) {
                   </div>
                   <div>
                     <dt className="text-sm text-[#737373]">发布时间</dt>
-                    <dd className="text-[#1C1C1C] font-medium">{caseItem.publishedAt || caseItem.createdAt}</dd>
+                    <dd className="text-[#1C1C1C] font-medium">{caseItem.date}</dd>
                   </div>
                 </dl>
               </div>

src/app/(marketing)/cases/[id]/page.tsx

@@ -10,8 +10,8 @@ interface CaseItem {
   content: string;
   category: string;
   slug: string;
-  publishedAt?: string;
-  createdAt: string;
+  date: string;
+  image?: string;
 }
 
 export async function generateStaticParams() {