sync(skills-sh): 上游更新 20260828

[github-actions]

自动同步 skills-sh 上游 skills。

⚠️ skill 内容本质是 prompt 与脚本，合并前请审查变更。

 .../tools/xhs-downloader/batch_download.py         |    48 +
 .../tools/xhs-downloader/export_memory.py          |    67 +
 .../tools/xhs-downloader/export_to_workspace.py    |   101 +
 sync-state/skills-sh.json                          | 34668 ++++++++++-----
 37613 files changed, 3981991 insertions(+), 1022523 deletions(-)