fix: clarify local tools on remote hosts

The remote host settings page did not explain that locally configured Skills and MCP servers stay on the desktop. It now states that boundary in Chinese and English, with a focused UI regression test.

Document the planned local Node.js and Python environment for local Skills and stdio MCP servers, including managed and custom sources, compatibility migration, lifecycle, remote boundaries, and acceptance criteria.

Release note: 远程主机设置现在明确说明本机 Skills 和 MCP 不会作用于远程主机。

docs/architecture/remote-host-and-goodbuddy-agent-design.md

@@ -174,6 +174,9 @@ Main 传入已规范化的绝对 POSIX root。Agent 返回 Workspace identity、
 托管 SSH 项目的 Composer Runtime 菜单只显示当前配置的 OpenCode 和管理入口，不显示
 直连模型、Continue 或 DeepSeek Harness。激活旧远程会话时，若其保存了其他 Runtime
 selection，Renderer 会恢复为当前 OpenCode 配置；Main 的远程请求校验仍是最终边界。
+本机配置的 SKILL 包和 stdio MCP Server 不上传或分配给远程 Runtime；远程 ACP Session
+继续使用空 MCP Server 列表。Node.js、Python 等本机工具环境同样不修改或同步到 Host，
+完整边界见[本机工具环境设计与实施计划](./local-tool-environment-design.md)。
 
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