fix: 日志时区修复 + 日期选择器

- logger.ts: 使用 UTC+8 时区记录日志
- logs.ts: 统计使用 UTC+8 今日日期
- logs.vue: 日期选择器改用 picker 组件
- 移除未使用的 showDatePicker 变量

client/src/pages/admin/logs.vue

@@ -53,10 +53,12 @@
     <view class="query-section">
       <view class="query-header">
         <text class="section-title">日志查询</text>
-        <view class="date-picker" @tap="showDatePicker = true">
-          <Icon name="calendar" :size="28" color="#8B7E7E" />
-          <text class="date-text">{{ selectedDate }}</text>
-        </view>
+        <picker mode="date" :value="selectedDate" @change="onDateChange">
+          <view class="date-picker">
+            <Icon name="calendar" :size="28" color="#8B7E7E" />
+            <text class="date-text">{{ selectedDate }}</text>
+          </view>
+        </picker>
       </view>
 
       <!-- 筛选条件 -->
@@ -109,7 +111,6 @@ const logLines = ref<string[]>([])
 const loading = ref(false)
 const page = ref(1)
 const total = ref(0)
-const showDatePicker = ref(false)
 
 const noMore = computed(() => logLines.value.length >= total.value && total.value > 0)
 
@@ -178,6 +179,12 @@ function selectDate(date: string) {
   loadLogs()
 }
 
+function onDateChange(e: any) {
+  selectedDate.value = e.detail.value
+  page.value = 1
+  loadLogs()
+}
+
 function getBarWidth(count: number): number {
   if (!stats.value) return 0
   const max = Math.max(...stats.value.daily.map(d => d.total), 1)

server/src/middleware/logger.ts

@@ -8,15 +8,22 @@ if (!fs.existsSync(LOG_DIR)) {
   fs.mkdirSync(LOG_DIR, { recursive: true })
 }
 
-/** 获取当前日期字符串 YYYY-MM-DD */
+/** 获取 UTC+8 时间 */
+function getChinaTime(date: Date = new Date()): Date {
+  const utc = date.getTime() + date.getTimezoneOffset() * 60000
+  return new Date(utc + 8 * 3600000)
+}
+
+/** 获取当前日期字符串 YYYY-MM-DD（UTC+8） */
 function getDateStr(): string {
-  const d = new Date()
+  const d = getChinaTime()
   return `${d.getFullYear()}-${String(d.getMonth() + 1).padStart(2, '0')}-${String(d.getDate()).padStart(2, '0')}`
 }
 
-/** 格式化时间 HH:mm:ss.SSS */
+/** 格式化时间 HH:mm:ss.SSS（UTC+8） */
 function formatTime(date: Date): string {
-  return `${String(date.getHours()).padStart(2, '0')}:${String(date.getMinutes()).padStart(2, '0')}:${String(date.getSeconds()).padStart(2, '0')}.${String(date.getMilliseconds()).padStart(3, '0')}`
+  const d = getChinaTime(date)
+  return `${String(d.getHours()).padStart(2, '0')}:${String(d.getMinutes()).padStart(2, '0')}:${String(d.getSeconds()).padStart(2, '0')}.${String(d.getMilliseconds()).padStart(3, '0')}`
 }
 
 /** 写入日志文件 */

server/src/routes/logs.ts

@@ -7,6 +7,14 @@ import { requireAdmin } from '../middleware/requireAdmin'
 const router = Router()
 const LOG_DIR = path.resolve(process.env.LOG_DIR || './logs')
 
+/** 获取 UTC+8 今日日期字符串 */
+function getTodayStr(): string {
+  const now = new Date()
+  const utc = now.getTime() + now.getTimezoneOffset() * 60000
+  const d = new Date(utc + 8 * 3600000)
+  return `${d.getFullYear()}-${String(d.getMonth() + 1).padStart(2, '0')}-${String(d.getDate()).padStart(2, '0')}`
+}
+
 /** 获取日志列表（最近7天） */
 router.get('/files', requireAdmin, (_req, res) => {
   try {
@@ -45,8 +53,7 @@ router.get('/stats', requireAdmin, (_req, res) => {
       return res.json({ code: 0, data: { today: { total: 0, errors: 0, slow: 0 }, files: [] } })
     }
 
-    const today = new Date()
-    const dateStr = `${today.getFullYear()}-${String(today.getMonth() + 1).padStart(2, '0')}-${String(today.getDate()).padStart(2, '0')}`
+    const dateStr = getTodayStr()
     const todayFile = path.join(LOG_DIR, `${dateStr}.log`)
 
     let todayStats = { total: 0, errors: 0, slow: 0, warns: 0 }