refactor: 删除旧的E2E测试文件

删除文件：
- e2e/admin-frontend-interaction.spec.ts
- e2e/admin-publish-core.spec.ts
- e2e/admin-publish.spec.ts
- e2e/website-acceptance.spec.ts

原因：
- 已被新的测试架构替代
- 新架构采用Page Object Model模式
- 新架构有更清晰的测试分类（smoke/journeys/features）
- 新架构提供更好的可维护性和可扩展性

新测试架构：
- smoke/ - 冒烟测试
- journeys/ - 用户旅程测试
- features/ - 功能测试
- pages/ - Page Object Model
- fixtures/ - 测试固件

package.json

@@ -17,6 +17,13 @@
     "test:fast": "TEST_TIER=fast playwright test",
     "test:standard": "TEST_TIER=standard playwright test",
     "test:deep": "TEST_TIER=deep playwright test",
+    "test:smoke": "playwright test --grep @smoke",
+    "test:journey": "playwright test --grep @journey",
+    "test:feature": "playwright test --grep @feature",
+    "test:admin": "playwright test --grep @admin",
+    "test:frontend": "playwright test --grep @frontend",
+    "test:ui": "playwright test --ui",
+    "test:debug": "playwright test --debug",
     "db:generate": "drizzle-kit generate",
     "db:migrate": "drizzle-kit migrate",
     "db:push": "drizzle-kit push",