Co-authored-by: 15940037959 <937348933@qq.com>

* fix(pdf): 关闭水印输入流并防护空水印文件

Refactor watermark service to ensure file streams are closed properly, even on failure. Added error handling for encrypted PDFs and improved readability.

* test(pdf): 新增水印服务行为测试

…CoderWanFeng#171)

Add video_edit skill combining all 6 audio and video editing features:
- cut_video: trim/cut video file by start_time and end_time
- cut_audio: trim/cut audio file by start_time and end_time
- crop_video: crop video screen coordinates and dimensions
- concat_videos: concatenate multiple video files in sequence
- concat_audios: concatenate multiple audio files in sequence
- add_audio_to_video: add or replace audio track in video file

Service implementation added to office/lib/video/video_edit_service.py.

Co-authored-by: dmb-255474348 <dmb-255474348@qq.com>

* 提交批量处理图片的代码

* 提交批量处理图片的代码

* 提交关于批量处理图片的代码,已经readme示例

* 提交关于批量处理图片的代码,已经readme示例

* 提交关于批量处理图片的代码,已经readme示例

* 提交关于批量处理图片的代码,以及readme

* 提交关于批量处理图片的代码,以及readme

1.  删除旧的.qoder目录下的冗余文档文件
2.  将所有文档文件统一迁移到/wiki/zh/标准目录结构中
3.  新增了Excel、图片、微信自动化、PDF处理等多个模块的详细文档
4.  补充了示例大全、API参考、Skills系统等完整的文档分类
5.  统一了文档的引用格式和目录结构

手动解决冲突，保留 develop 的 docstring 和 PR CoderWanFeng#144 的行内注释。

- 增加多个标题和章节之间的空行，提升文档可读性
- 移除简介中关于微信的部分，调整功能覆盖描述
- 统一关键参数说明部分的格式，新增空行分隔
- 更新目录与示例引用链接，确保结构清晰
- 完善 Windows 环境特性说明，便于用户理解限制

Expose the existing webpage-to-ebook example as a discoverable Skill so agents can convert URLs without hunting through office.api.web.

Co-authored-by: Claw Assistant <claw@openclaw.ai>
Co-authored-by: Cursor <cursoragent@cursor.com>

…WanFeng#177)

* fix: handle non-string pandas column names in memory optimizer

* test: cover pandas memory optimizer with integer columns

* fix: keep pandas memory optimizer diff focused

* test: cover pandas object column optimization cases

Co-authored-by: lawliet206 <lawliet206@users.noreply.github.com>