refactor(test): migrate e2e to Playwright and remove duplicate unit tests

Switch extractor-workflow e2e test from vitest to Playwright test runner
for consistency with playwright.config.ts. Remove redundant unit tests
(cleaner, erp-auth, extractor) that have been superseded by more thorough
replacements under tests/unit/services/erp/. Enable test isolation
unconditionally to prevent cross-file state pollution.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

vitest.config.ts

@@ -11,8 +11,7 @@ export default defineConfig({
     env: {
       NODE_ENV: 'test'
     },
-    // CI 环境启用隔离以捕获跨文件状态污染；本地开发禁用以提升速度
-    isolate: !!process.env.CI,
+    isolate: true,
     pool: 'threads', // 使用线程池
     maxWorkers: 4,
     bail: process.env.CI ? 1 : undefined,