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/tasks/LocalAgentTask/LocalAgentTask.tsx

@@ -24,7 +24,7 @@ import { asAgentId } from '../../types/ids.js';
 import type { Message } from '../../types/message.js';
 import { createAbortController, createChildAbortController } from '../../utils/abortController.js';
 import { registerCleanup } from '../../utils/cleanupRegistry.js';
-import { getToolSearchOrReadInfo } from '../../utils/collapseReadSearch.js';
+import { getSearchExtraToolsOrReadInfo } from '../../utils/collapseReadSearch.js';
 import { enqueuePendingNotification } from '../../utils/messageQueueManager.js';
 import { getAgentTranscriptPath } from '../../utils/sessionStorage.js';
 import { evictTaskOutput, getTaskOutputPath, initTaskOutputAsSymlink } from '../../utils/task/diskOutput.js';
@@ -106,7 +106,7 @@ export function updateProgressFromMessage(
       // Omit StructuredOutput from preview - it's an internal tool
       if (content.name !== SYNTHETIC_OUTPUT_TOOL_NAME) {
         const input = content.input as Record<string, unknown>;
-        const classification = tools ? getToolSearchOrReadInfo(content.name!, input, tools) : undefined;
+        const classification = tools ? getSearchExtraToolsOrReadInfo(content.name!, input, tools) : undefined;
         tracker.recentActivities.push({
           toolName: content.name!,
           input,