docs(08-01): complete zhihu content crawler plan

- ZhihuCrawler class with API interception
- AnswerData, ArticleData models
- 15 tests passing

Requirements: CONT-01, CONT-02, CONT-04 completed

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

.planning/REQUIREMENTS.md

@@ -16,10 +16,10 @@
 
 ### 内容爬取
 
-- [ ] **CONT-01**: 爬取知乎问答 - 问题标题、问题描述、回答内容、元数据
-- [ ] **CONT-02**: 爬取知乎专栏/文章 - 标题、正文、元数据
+- [x] **CONT-01**: 爬取知乎问答 - 问题标题、问题描述、回答内容、元数据
+- [x] **CONT-02**: 爬取知乎专栏/文章 - 标题、正文、元数据
 - [ ] **CONT-03**: 爬取内容下的评论（可选开关）
-- [ ] **CONT-04**: 提取作者信息、发布时间、点赞数等元数据
+- [x] **CONT-04**: 提取作者信息、发布时间、点赞数等元数据
 
 ### 网络与反爬
 
@@ -115,10 +115,10 @@
 | AUTH-02 | Phase 7 | Complete |
 | AUTH-03 | Phase 7 | Complete |
 | AUTH-04 | Phase 7 | Complete |
-| CONT-01 | Phase 8 | Pending |
-| CONT-02 | Phase 8 | Pending |
+| CONT-01 | Phase 8 | Complete |
+| CONT-02 | Phase 8 | Complete |
 | CONT-03 | Phase 8 | Pending |
-| CONT-04 | Phase 8 | Pending |
+| CONT-04 | Phase 8 | Complete |
 | NET-01 | Phase 8 | Pending |
 | NET-02 | Phase 8 | Pending |
 | NET-03 | Phase 8 | Pending |

.planning/phases/08-crawler/08-01-SUMMARY.md

@@ -0,0 +1,86 @@
+---
+phase: 08-crawler
+plan: 01
+subsystem: crawler
+tags: [playwright, pydantic, zhihu, api-interception]
+
+requires:
+  - phase: 07-login-auth
+    provides: ZhihuLogin + Cookie management
+provides:
+  - ZhihuCrawler class with crawl_answer() and crawl_article() methods
+  - AnswerData, ArticleData data models
+  - CrawlResult wrapper
+affects: [08-02, 08-03]
+
+tech-stack:
+  added: []
+  patterns:
+    - Playwright route interception for content extraction
+    - pydantic data models for structured data
+
+key-files:
+  created:
+    - kb_workflow/crawler/__init__.py
+    - kb_workflow/crawler/models.py
+    - kb_workflow/crawler/zhihu_crawler.py
+    - tests/test_crawler/__init__.py
+    - tests/test_crawler/conftest.py
+    - tests/test_crawler/test_answer_crawler.py
+    - tests/test_crawler/test_article_crawler.py
+    - tests/test_crawler/test_metadata_extraction.py
+  modified: []
+key-decisions:
+  - use Playwright page.route() for API interception over direct API calls
+  - pydantic models for structured data
+  - TDD workflow with mocking for easy test maintenance
+requirements-completed: [CONT-01, CONT-02, CONT-04]
+duration: 3min
+completed: 2026-03-17
+---
+
+## Summary
+
+实现了知乎问答和专栏内容爬取功能，使用 Playwright 拦截 API 请求获取结构化 JSON 数据。
+
+### What Was Built
+
+**ZhihuCrawler 类** (`kb_workflow/crawler/zhihu_crawler.py`)
+- `crawl_answer(url)` - 爬取知乎问答，返回 `AnswerData`
+- `crawl_article(url)` - 爬取知乎专栏，返回 `ArticleData`
+- API 拦截器 `ZhihuApiInterceptor` 捕获 `/api/v4/answers/` 和 `/api/v4/articles/` 响应
+- DOM 解析备选方案（使用 `ZhihuPlaywrightExtractor`）
+
+**数据模型** (`kb_workflow/crawler/models.py`)
+- `AuthorInfo` - 作者信息（名称、URL token、签名）
+- `ContentMetadata` - 内容元数据（作者、点赞数、评论数、时间戳）
+- `AnswerData` - 问答数据（ID、问题ID、标题、内容、摘要、元数据）
+- `ArticleData` - 专栏数据（ID、标题、内容、摘要、元数据）
+- `CrawlResult` - 统一结果包装（成功/失败、内容类型、数据/错误）
+
+### Test Coverage
+
+**15 个测试全部通过**
+- `test_answer_crawler.py` - 5 个测试
+- `test_article_crawler.py` - 4 个测试
+- `test_metadata_extraction.py` - 6 个测试
+
+### Commits
+
+1. `a102a75` feat(08-01): create crawler data models and test scaffolding
+2. `912773f` test(08-01): add failing tests for ZhihuCrawler
+3. `aa96bc9` feat(08-01): implement ZhihuCrawler with API interception
+
+### Key Decisions
+
+1. **API 拦截 vs 直接 API 调用**: 使用 Playwright `page.route()` 拦截浏览器请求，自动处理签名和 Cookie
+2. **TDD 工作流**: 先写测试，使用 mock fixtures 确保测试可维护性
+3. **备选方案**: 当 API 拦截失败时，回退到 DOM 解析
+
+### Requirements Completed
+
+- **CONT-01**: 爬取知乎问答，获取问题标题、描述、回答内容 ✓
+- **CONT-02**: 爬取知乎专栏/文章，获取标题和正文 ✓
+- **CONT-04**: 爬取结果包含作者信息、发布时间、点赞数等元数据 ✓
+
+## Self-Check: PASSED