# Plan 03-01 Summary: 迁移前程无忧（job51）层至 crawler_core

**Status:** Complete
**Tasks:** 6/6
**Commit:** 8c2c2d2

## What was built

将 `spiderJobs/platforms/job51/` 4 个文件迁移至 crawler_core：

- **client.py**：HTTPClient 改用 `crawler_core.http_client`，Job51Sign 改用 `crawler_core.qcwy.sign`
- **api.py**：
  - import 改为 `crawler_core.base.Result/BaseFetcher/BaseSearcher`
  - `ApiResult` 全量替换为 `Result`（共 11 处）
  - 2 处 `self._http.get(` → `self.http_client.get(`（GetJobDetail/GetCompanyInfo 的覆写 fetch）
  - 为 POST Searcher（SearchRecommendJobs/SearchCompanyJobs）添加 `_request()` POST 覆写
- **main.py**：BaseFetcher/BaseSearcher 改用 `crawler_core.base`
- **sign.py**：向后兼容桩，重新导出 `crawler_core.qcwy.sign.Job51Sign`
- **tests/job51/test_job51_client.py**：17 个 mock 测试，覆盖所有 API 类

## Verification

```
pytest tests/job51/ -v → 17 passed ✅
```

## Self-Check: PASSED
