audit fixes: align all frontend timestamps to Beijing time + debounce MarketPage search (vv2026.07.20.1)

frontend/src/pages/front/ChatPage.tsx

@@ -1,6 +1,7 @@
 import React, { useState, useRef, useEffect, useMemo, useCallback } from 'react';
 import { useParams, useNavigate } from 'react-router-dom';
 import { chatAPI, knowledgeAPI, marketAPI, evolutionAPI } from '@/api';
+import { formatChatTime } from '@/utils/datetime';
 import type { Conversation, Message } from '@/types';
 import './ChatPage.css';
 
@@ -396,21 +397,7 @@ function escapeHtml(text: string): string {
 
 // ===== Time Formatting =====
 function formatTime(iso: string): string {
-  const date = new Date(iso);
-  const now = new Date();
-  const diff = now.getTime() - date.getTime();
-  const oneDay = 24 * 60 * 60 * 1000;
-
-  if (diff < oneDay) {
-    return date.toLocaleTimeString('zh-CN', { hour: '2-digit', minute: '2-digit' });
-  } else if (diff < 7 * oneDay) {
-    const days = ['周日', '周一', '周二', '周三', '周四', '周五', '周六'];
-    return days[date.getDay()];
-  } else if (date.getFullYear() === now.getFullYear()) {
-    return `${date.getMonth() + 1}/${date.getDate()}`;
-  } else {
-    return `${date.getFullYear()}/${date.getMonth() + 1}/${date.getDate()}`;
-  }
+  return formatChatTime(iso);
 }
 
 // ===== Helpers: normalize API responses =====