[Bug] 添加了bocha web_searcher 在使用过程中报错

Start at backend/app/astrbot/builtin_stars/web_searcher/main.py, especially the readability import, then inspect the project's dependency declarations and packaging for the web_searcher plugin. Reproduce the Windows startup path and verify that lxml.html is available and the web_searcher plugin loads without the ModuleNotFoundError.

What happened / 发生了什么

在完成astrbot配置，在使用过程中配置了 web_searcher API。但在AI运行过程中进行了报错

Reproduce / 如何复现？

似乎在配置了bocha API后一直都不太能正常使用

AstrBot version, deployment method (e.g., Windows Docker Desktop deployment), provider used, and messaging platform used. / AstrBot 版本、部署方式（如 Windows Docker Desktop 部署）、使用的提供商、使用的消息平台适配器

4.20.1

OS

Windows

Logs / 报错日志

[2026-03-18 18:09:13.245] [Core] [INFO] [star.star_manager:744]: 正在载入插件 web_searcher ...
[2026-03-18 18:09:13.307] [Core] [ERRO] [v4.20.1] [star.star_manager:756]: Traceback (most recent call last):
File "\?\C:\AIAgent\AstrBot\backend\app\astrbot\core\star\star_manager.py", line 342, in import_plugin_with_dependency_recovery
return import(path, fromlist=[module_str])
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "\?\C:\AIAgent\AstrBot\backend\app\astrbot\builtin_stars\web_searcher\main.py", line 8, in
from readability import Document
File "C:\AIAgent\AstrBot\backend\python\Lib\site-packages\readability_init.py", line 3, in
from .readability import Document
File "C:\AIAgent\AstrBot\backend\python\Lib\site-packages\readability\readability.py", line 12, in
from lxml.html import document_fromstring
ModuleNotFoundError: No module named 'lxml.html'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "\?\C:\AIAgent\AstrBot\backend\app\astrbot\core\star\star_manager.py", line 748, in load
module = await self._import_plugin_with_dependency_recovery(
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "\?\C:\AIAgent\AstrBot\backend\app\astrbot\core\star\star_manager.py", line 363, in import_plugin_with_dependency_recovery
return import(path, fromlist=[module_str])
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "\?\C:\AIAgent\AstrBot\backend\app\astrbot\builtin_stars\web_searcher\main.py", line 8, in
from readability import Document
File "C:\AIAgent\AstrBot\backend\python\Lib\site-packages\readability_init.py", line 3, in
from .readability import Document
File "C:\AIAgent\AstrBot\backend\python\Lib\site-packages\readability\readability.py", line 12, in
from lxml.html import document_fromstring
ModuleNotFoundError: No module named 'lxml.html'
[2026-03-18 18:09:13.308] [Core] [ERRO] [v4.20.1] [star.star_manager:757]: 插件 web_searcher 导入失败。原因：No module named 'lxml.html'

Are you willing to submit a PR? / 你愿意提交 PR 吗？

• Yes!

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