feat: 增加 screen_id 参数以支持针对特定屏幕的工具执行，优化大屏控制逻辑

src/pages/VoiceAssistant.jsx

@@ -9,6 +9,7 @@ import { useCallback, useEffect, useRef, useState } from 'react';
 import { S2sWsRealtimeClient } from '../voice/s2s-ws-client.js';
 import useVisionDetection, { VISION_DWELL_MS } from '../voice/useVisionDetection.js';
 import { getApiBase as API_BASE, getVoiceWsUrl } from '../config';
+import { getClientId } from '../utils/mqtt';
 import { aiStatus } from '../utils/statusBus';
 import '../styles/datascreen.css';
 import './voice-original.css';
@@ -242,7 +243,7 @@ export default function VoiceAssistant() {
       const res = await fetch(`${API_BASE()}/api/tools/exec`, {
         method: 'POST',
         headers: { 'Content-Type': 'application/json' },
-        body: JSON.stringify({ name, args }),
+        body: JSON.stringify({ name, args, screen_id: getClientId() }),
       });
       const data = await res.json();
       output = data?.result ?? JSON.stringify(data);