[Bug] WebChat 界面中输出一个完整的 HTML 页面时，未能正确识别该内容

[MostimaBridges]

What happened / 发生了什么

当 AI 在 WebChat 界面中输出一个完整的 HTML 页面时，
WebChat 未能正确识别该内容为 HTML，部分内容在Plain Text内，而部分不在，比如这个例子当中的搜索框

Reproduce / 如何复现？

在webchat中输入：请复述这段代码，不要有其他任何行为：

<title>角色介绍 - 死神模拟器 Wiki</title>

死神模拟器 Wiki

搜索

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

4.19.4 Windows webchat

OS

Windows

Logs / 报错日志

[2026-03-10 19:12:55.271] [Core] [INFO] [core.core_lifecycle:297]: AstrBot 启动完成。
[2026-03-10 19:12:55.280] [Core] [INFO] [utils.temp_dir_cleaner:127]: TempDirCleaner started. interval=600s cleanup_ratio=0.3
[2026-03-10 19:12:57.608] [Core] [INFO] [t2i.network_strategy:56]: Successfully got 2 official T2I endpoints.
[2026-03-10 19:13:01.359] [Core] [INFO] [utils.llm_metadata:63]: Successfully fetched metadata for 2082 LLMs.
[2026-03-10 19:13:16.530] [Core] [INFO] [aiocqhttp.aiocqhttp_platform_adapter:107]: aiocqhttp(OneBot v11) 适配器已连接。
[2026-03-10 19:14:20.665] [Core] [DBUG] [webchat.webchat_queue_mgr:126]: Started listener for conversation: 394b3d61-415c-4e7e-9594-8c95abd724ae
[2026-03-10 19:14:20.669] [Core] [DBUG] [webchat.webchat_adapter:216]: WebChatAdapter: [Plain(type=<ComponentType.Plain: 'Plain'>, text='请复述这段代码，不要有其他任何行为：\n\n\n \n \n <title>角色介绍 - 死神模拟器 Wiki</title>\n \n\t\n\n\n \n

\n

\n

\n \n

死神模拟器 Wiki

\n

\n

\n \n \n 搜索\n \n

\n

\n \n\n \n \n

\n

\n
• 首页
\n
• 游戏介绍
\n
• 游戏玩法
\n
• 世界观
\n
• 历史事件
\n
• 角色介绍
\n
• 攻略指南
\n
• 下载链接
\n

\n

\n \n \n

\n

\n \n

\n

快捷栏

\n

\n
• 苏醒
\n
• 三眼死神
\n
• 摸鱼时间
\n\t\t\t\t\t
• 为人之日
', convert=True)]
[2026-03-10 19:14:20.675] [Core] [INFO] [core.event_bus:61]: [default] [webchat(webchat)] test/test: 请复述这段代码，不要有其他任何行为：
<title>角色介绍 - 死神模拟器 Wiki</title>

死神模拟器 Wiki
搜索

<!-- 导航栏 -->
<nav>
    <div class="container">
        <ul>
            <li><a href="../index.html">首页</a></li>
            <li><a href="introduction.html">游戏介绍</a></li>
            <li><a href="gameplay.html">游戏玩法</a></li>
            <li><a href="worldview.html">世界观</a></li>
            <li><a href="historical-events.html">历史事件</a></li>
            <li><a href="characters.html" class="active">角色介绍</a></li>
            <li><a href="guide.html">攻略指南</a></li>
            <li><a href="download.html">下载链接</a></li>
        </ul>
    </div>
</nav>

<div class="container">
    <div class="main-content">
        <!-- 侧边栏保持不变 -->
        <div class="sidebar">
            <h2>快捷栏</h2>
            <ul>
                <li><a href="#1dress">苏醒</a></li>
                <li><a href="#2dress">三眼死神</a></li>
                <li><a href="#3dress">摸鱼时间</a></li>
				<li><a href="#4dress">为人之日</a></li> 

[2026-03-10 19:14:20.679] [Core] [DBUG] [waking_check.stage:157]: enabled_plugins_name: ['*']
[2026-03-10 19:14:20.690] [Core] [DBUG] [method.star_request:44]: plugin -> session_controller - handle_session_control_agent
[2026-03-10 19:14:20.691] [Core] [DBUG] [method.star_request:44]: plugin -> session_controller - handle_empty_mention
[2026-03-10 19:14:20.693] [Core] [DBUG] [method.star_request:44]: plugin -> astrbot_plugin_videos_analysis - auto_parse_bili
[2026-03-10 19:14:20.694] [Core] [DBUG] [method.star_request:44]: plugin -> astrbot_plugin_videos_analysis - auto_parse_xhs
[2026-03-10 19:14:20.696] [Core] [DBUG] [method.star_request:44]: plugin -> astrbot_plugin_videos_analysis - auto_parse_mcmod
[2026-03-10 19:14:20.697] [Core] [DBUG] [method.star_request:44]: plugin -> astrbot_plugin_videos_analysis - process_direct_video
[2026-03-10 19:14:20.697] [Core] [DBUG] [method.star_request:44]: plugin -> astrbot_plugin_videos_analysis - auto_parse_dy
[2026-03-10 19:14:20.702] [Core] [DBUG] [agent_sub_stages.internal:166]: ready to request llm provider
[2026-03-10 19:14:20.702] [Core] [DBUG] [agent_sub_stages.internal:185]: acquired session lock for llm request
[2026-03-10 19:14:20.769] [Core] [DBUG] [pipeline.context_utils:95]: hook(OnLLMRequestEvent) -> astrbot - decorate_llm_req
[2026-03-10 19:14:20.770] [Core] [DBUG] [pipeline.context_utils:95]: hook(OnLLMRequestEvent) -> astrbot-web-searcher - edit_web_search_tools
[2026-03-10 19:14:20.777] [Core] [INFO] [respond.stage:184]: Prepare to send - test/test:
[2026-03-10 19:14:20.777] [Core] [INFO] [respond.stage:200]: 应用流式输出(webchat)
[2026-03-10 19:14:20.778] [Core] [DBUG] [runners.base:64]: Agent state transition: AgentState.IDLE -> AgentState.RUNNING
[2026-03-10 19:14:20.779] [Core] [DBUG] [runners.tool_loop_agent_runner:297]: [BefCompact] RunCtx.messages -> [12] system,user,assistant,user,assistant,user,assistant,user,assistant,tool,assistant,user
[2026-03-10 19:14:20.780] [Core] [DBUG] [runners.tool_loop_agent_runner:297]: [AftCompact] RunCtx.messages -> [12] system,user,assistant,user,assistant,user,assistant,user,assistant,tool,assistant,user
[2026-03-10 19:14:39.174] [Core] [DBUG] [runners.base:64]: Agent state transition: AgentState.RUNNING -> AgentState.DONE
[2026-03-10 19:14:39.174] [Core] [DBUG] [pipeline.context_utils:95]: hook(OnLLMResponseEvent) -> astrbot - record_llm_resp_to_ltm
[2026-03-10 19:14:39.227] [Core] [INFO] [result_decorate.stage:189]: 流式输出已启用，跳过结果装饰阶段
[2026-03-10 19:14:39.228] [Core] [DBUG] [pipeline.scheduler:93]: pipeline 执行完毕。

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

• Yes!

Code of Conduct

• I have read and agree to abide by the project's Code of Conduct。

[dosubot]

Hi @MostimaBridges! I'm Dosu and I’m helping the AstrBot team.

感谢提交这个 bug 报告！根据代码分析，问题可能出在 WebChat 前端渲染层 而非后端适配器。

从日志可以看到 HTML 标签结构被破坏了：

<html lang="zh-CN"></html>\n<head></head>

正常应该是嵌套结构，但这里标签被提前闭合了。

核心发现：

• 后端 webchat_adapter.py 和 message_parts_helper.py 不进行任何 HTML 解析或标签处理，文本应该原样传递
• 之前有类似报告：Issue #1992 提到 HTML 代码被执行而非显示的问题

可能的原因：

1. 前端在消息生成时解析了 HTML 内容
2. 前端 Markdown 渲染器错误地将 HTML 作为标记语言处理，而非作为代码块显示

建议开发者检查 WebChat 前端的消息输入和显示逻辑，看看 HTML 标签在哪个环节被处理了。

To reply, just mention @dosu.

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