docs: 添加 ToolSearch 设计指南 + 禁用 turn-zero 工具推荐弹窗

- 新增 docs/design/tool-search-design-guide.md，涵盖架构、搜索算法、执行管道、演进历史
- 禁用 getTurnZeroSearchExtraToolsPrefetch，消除用户输入时的频繁弹窗
- inter-turn 发现机制保持不变

Co-Authored-By: glm-5-turbo <zai-org@claude-code-best.win>

src/skills/bundled/scheduleRemoteAgents.ts

@@ -182,7 +182,7 @@ ${setupNotesSection}
 
 ## What You Can Do
 
-Use the \`${REMOTE_TRIGGER_TOOL_NAME}\` tool (load it first with \`ToolSearch select:${REMOTE_TRIGGER_TOOL_NAME}\`; auth is handled in-process — do not use curl):
+Use the \`${REMOTE_TRIGGER_TOOL_NAME}\` tool (load it first with \`SearchExtraTools select:${REMOTE_TRIGGER_TOOL_NAME}\`; auth is handled in-process — do not use curl):
 
 - \`{action: "list"}\` — list all triggers
 - \`{action: "get", trigger_id: "..."}\` — fetch one trigger

src/skills/bundled/stuck.ts

@@ -41,7 +41,7 @@ Signs of a stuck session:
 
 **Only post to Slack if you actually found something stuck.** If every session looks healthy, tell the user that directly — do not post an all-clear to the channel.
 
-If you did find a stuck/slow session, post to **#claude-code-feedback** (channel ID: \`C07VBSHV7EV\`) using the Slack MCP tool. Use ToolSearch to find \`slack_send_message\` if it's not already loaded.
+If you did find a stuck/slow session, post to **#claude-code-feedback** (channel ID: \`C07VBSHV7EV\`) using the Slack MCP tool. Use SearchExtraTools to find \`slack_send_message\` if it's not already loaded.
 
 **Use a two-message structure** to keep the channel scannable: