refactor: 移除演示业务工具 demo-tools（hotword_lookup / price_check）

apps/desktop/src/main/pi/agent-service.ts

@@ -17,7 +17,6 @@ import {
   type SessionInfo
 } from '@earendil-works/pi-coding-agent'
 import { ApprovalService, createApprovalExtension } from './approval'
-import { demoTools, TOOLS_REQUIRING_APPROVAL } from '../tools/demo-tools'
 import { browserTools } from '../tools/browser-tools'
 import type {
   AgentUiEvent,
@@ -49,7 +48,10 @@ import type {
 const DELTA_FLUSH_MS = 40
 
 /** SDK 注册的自定义工具名（用量卡片中与内置「系统工具」分开统计） */
-const CUSTOM_TOOL_NAMES = new Set<string>([...demoTools, ...browserTools].map((tool) => tool.name))
+const CUSTOM_TOOL_NAMES = new Set<string>(browserTools.map((tool) => tool.name))
+
+/** 需要人工审批的工具名单（高危内置工具；业务演示工具已随 demo-tools.ts 移除） */
+const TOOLS_REQUIRING_APPROVAL: ReadonlySet<string> = new Set(['bash', 'write', 'edit'])
 
 /**
  * pi 会话运行时的主进程封装：
@@ -289,7 +291,7 @@ export class AgentService {
         services,
         sessionManager,
         sessionStartEvent,
-        customTools: [...demoTools, ...browserTools]
+        customTools: browserTools
       })
       return { ...result, services, diagnostics: services.diagnostics }
     }