fix: 访问统计口径与体验——PV只计页面级接口(过滤轮询，今日221→真实口径)；埋点记录userId并显示昵称；访问日志Tab合并用户列

server/src/index.js

@@ -66,25 +66,41 @@ const limiter = rateLimit({
 })
 app.use('/api/', limiter)
 
-// 访问埋点：记录页面级 GET 请求（排除管理后台/认证/健康检查），小程序与 H5 访问均可统计
+// 访问埋点：记录页面级 GET 请求（排除管理后台/认证/健康检查/高频轮询接口），小程序与 H5 访问均可统计
+// PV 口径：只记"页面首屏"接口（每打开一页只计1次），轮询/统计类接口不计——避免一次访问刷出6-8条
+const TRACKABLE_PAGES = [/^\/knowledge(\?|$)/, /^\/trend(\?|$)/, /^\/knowledge\/stats/, /^\/ai-chat\/quota/, /^\/user\/leaderboard/, /^\/feedback/]
 app.use('/api', (req, res, next) => {
   try {
     if (req.method === 'GET' && !req.path.startsWith('/admin') && !req.path.startsWith('/auth')) {
-      const ua = String(req.headers['user-agent'] || '')
-      const referer = String(req.headers.referer || '')
-      let source = '直接访问'
-      if (referer.includes('servicewechat.com')) source = '小程序'
-      else if (referer.includes('/h5') || referer.includes('wdkj.yuzhiran.com.cn')) source = 'H5'
-      const os = /windows/i.test(ua) ? 'Windows' : /iphone|ipad|ios/i.test(ua) ? 'iOS' : /android/i.test(ua) ? 'Android' : /mac os/i.test(ua) ? 'MacOS' : ''
-      const browser = /MicroMessenger/i.test(ua) ? '微信' : /Mobile Safari/i.test(ua) ? 'Safari' : /Edg\//i.test(ua) ? 'Edge' : /Chrome/i.test(ua) ? 'Chrome' : /Firefox/i.test(ua) ? 'Firefox' : ''
-      const device = /Mobile|iPhone/i.test(ua) || (/Android/i.test(ua) && /Mobile/i.test(ua)) ? '移动端' : '桌面端'
-      VisitLog.create({
-        path: String(req.originalUrl || req.path).slice(0, 120),
-        referer: String(req.headers.referer || '').slice(0, 200),
-        source,
-        ip: req.ip || '',
-        os, browser, device,
-      }).catch(() => {})
+      const path = String(req.originalUrl || req.path).split('?')[0]
+      const isPage = TRACKABLE_PAGES.some((re) => re.test(path))
+      if (isPage) {
+        const ua = String(req.headers['user-agent'] || '')
+        const referer = String(req.headers.referer || '')
+        let source = '直接访问'
+        if (referer.includes('servicewechat.com')) source = '小程序'
+        else if (referer.includes('/h5') || referer.includes('wdkj.yuzhiran.com.cn')) source = 'H5'
+        const os = /windows/i.test(ua) ? 'Windows' : /iphone|ipad|ios/i.test(ua) ? 'iOS' : /android/i.test(ua) ? 'Android' : /mac os/i.test(ua) ? 'MacOS' : ''
+        const browser = /MicroMessenger/i.test(ua) ? '微信' : /Mobile Safari/i.test(ua) ? 'Safari' : /Edge\//i.test(ua) ? 'Edge' : /Chrome/i.test(ua) ? 'Chrome' : /Firefox/i.test(ua) ? 'Firefox' : ''
+        const device = /Mobile|iPhone/i.test(ua) || (/Android/i.test(ua) && /Mobile/i.test(ua)) ? '移动端' : '桌面端'
+        // 解析登录用户（不强制，游客为空）
+        let userId = null
+        const auth = String(req.headers.authorization || '')
+        if (auth.startsWith('Bearer ')) {
+          try {
+            const decoded = require('jsonwebtoken').verify(auth.slice(7), process.env.JWT_SECRET)
+            userId = decoded.userId || null
+          } catch { /* token 无效视为游客 */ }
+        }
+        VisitLog.create({
+          path: String(req.originalUrl || req.path).slice(0, 120),
+          referer: String(req.headers.referer || '').slice(0, 200),
+          source,
+          ip: req.ip || '',
+          userId,
+          os, browser, device,
+        }).catch(() => {})
+      }
     }
   } catch (e) { /* 埋点失败不影响业务 */ }
   next()