restore: 恢复误删的技能目录并修复导入方式

- 恢复 kb-zhihu-metadata, kb-bilibili-metadata, kb-deep-analyzer
- 修改 zhihu.py 和 analyze.py 使用 sys.path 方式导入
- 删除符号链接 kb_zhihu_metadata

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

kb_pipeline/platforms/zhihu.py

@@ -11,6 +11,13 @@ from typing import Dict, Any, Optional
 from datetime import datetime
 import re
 import asyncio
+import sys
+from pathlib import Path
+
+# Add kb-zhihu-metadata to path for import
+_kb_zhihu_path = Path(__file__).parent.parent.parent / "kb-zhihu-metadata"
+if str(_kb_zhihu_path) not in sys.path:
+    sys.path.insert(0, str(_kb_zhihu_path))
 
 from kb_pipeline.platforms.base import PlatformAdapter
 from kb_pipeline.errors import AuthError
@@ -20,7 +27,7 @@ from kb_pipeline.config import get_settings
 class ZhihuAdapter(PlatformAdapter):
     """Zhihu platform adapter for answer and zhuanlan content extraction.
 
-    Uses ZhihuPlaywrightExtractor (from kb_zhihu_metadata) for content extraction.
+    Uses ZhihuPlaywrightExtractor (from kb-zhihu-metadata) for content extraction.
     Requires KB_ZHIHU_COOKIE environment variable for authentication.
 
     Example:
@@ -82,14 +89,14 @@ class ZhihuAdapter(PlatformAdapter):
     def _get_extractor(self):
         """Get or create ZhihuPlaywrightExtractor instance.
 
-        Lazy import to avoid dependency issues when kb_zhihu_metadata is not installed.
+        Lazy import to avoid dependency issues when kb-zhihu-metadata is not installed.
 
         Returns:
             ZhihuPlaywrightExtractor instance
         """
         if self._extractor is None:
             try:
-                from kb_zhihu_metadata.zhihu_extractor import ZhihuPlaywrightExtractor
+                from zhihu_extractor import ZhihuPlaywrightExtractor
                 self._extractor = ZhihuPlaywrightExtractor(
                     headless=self.headless,
                     timeout=self.timeout,
@@ -97,8 +104,8 @@ class ZhihuAdapter(PlatformAdapter):
                 )
             except ImportError as e:
                 raise ImportError(
-                    "kb_zhihu_metadata package not found. "
-                    "Please install it to use ZhihuAdapter."
+                    "kb-zhihu-metadata module not found. "
+                    "Please ensure kb-zhihu-metadata directory exists."
                 ) from e
         return self._extractor