增加检查更新和下载功能，优化待看名单添加逻辑

backend/routes/update.js

@@ -0,0 +1,120 @@
+const express = require('express');
+const axios = require('axios');
+const { defaultLogger } = require('../utils/logger');
+const packageInfo = require('../../package.json');
+
+const router = express.Router();
+const logger = defaultLogger.child('UpdateRoute');
+
+/**
+ * 获取当前版本信息
+ */
+router.get('/current-version', (req, res) => {
+  try {
+    res.json({
+      success: true,
+      data: {
+        version: packageInfo.version,
+        name: packageInfo.name,
+        description: packageInfo.description
+      }
+    });
+  } catch (error) {
+    logger.error('获取当前版本失败', error);
+    res.status(500).json({
+      success: false,
+      error: '获取当前版本失败',
+      message: error.message
+    });
+  }
+});
+
+/**
+ * 检查最新版本
+ */
+router.get('/check-latest', async (req, res) => {
+  try {
+    logger.info('检查最新版本...');
+    
+    // 获取GitHub发行版信息
+    const response = await axios.get('https://api.github.com/repos/kjqwer/pixiv-D/releases/latest', {
+      timeout: 10000,
+      headers: {
+        'User-Agent': 'Pixiv-Manager-Update-Checker'
+      }
+    });
+
+    const latestRelease = response.data;
+    const currentVersion = packageInfo.version;
+    const latestVersion = latestRelease.tag_name.replace(/^v/, ''); // 移除v前缀
+
+    // 版本比较
+    const hasUpdate = compareVersions(latestVersion, currentVersion) > 0;
+
+    const result = {
+      current: currentVersion,
+      latest: latestVersion,
+      hasUpdate,
+      releaseInfo: {
+        name: latestRelease.name,
+        body: latestRelease.body,
+        publishedAt: latestRelease.published_at,
+        htmlUrl: latestRelease.html_url,
+        downloadUrl: latestRelease.assets.find(asset => 
+          asset.name.includes('pixiv-manager-portable.rar')
+        )?.browser_download_url || latestRelease.html_url
+      }
+    };
+
+    logger.info(`版本检查完成: 当前版本 ${currentVersion}, 最新版本 ${latestVersion}, 有更新: ${hasUpdate}`);
+
+    res.json({
+      success: true,
+      data: result
+    });
+
+  } catch (error) {
+    logger.error('检查最新版本失败', error);
+    
+    // 如果是网络错误，返回友好的错误信息
+    let errorMessage = '检查更新失败';
+    if (error.code === 'ENOTFOUND' || error.code === 'ECONNREFUSED') {
+      errorMessage = '无法连接到GitHub，请检查网络连接';
+    } else if (error.response?.status === 404) {
+      errorMessage = '未找到发行版信息';
+    } else if (error.response?.status === 403) {
+      errorMessage = 'GitHub API访问限制，请稍后再试';
+    }
+
+    res.status(500).json({
+      success: false,
+      error: errorMessage,
+      message: error.message
+    });
+  }
+});
+
+/**
+ * 版本比较函数
+ * @param {string} version1 版本1
+ * @param {string} version2 版本2  
+ * @returns {number} 1: version1 > version2, 0: 相等, -1: version1 < version2
+ */
+function compareVersions(version1, version2) {
+  const v1Parts = version1.split('.').map(Number);
+  const v2Parts = version2.split('.').map(Number);
+  
+  const maxLength = Math.max(v1Parts.length, v2Parts.length);
+  
+  for (let i = 0; i < maxLength; i++) {
+    const v1Part = v1Parts[i] || 0;
+    const v2Part = v2Parts[i] || 0;
+    
+    if (v1Part > v2Part) return 1;
+    if (v1Part < v2Part) return -1;
+  }
+  
+  return 0;
+}
+
+module.exports = router; 

backend/server.js

@@ -15,6 +15,7 @@ const proxyRoutes = require('./routes/proxy');
 const repositoryRoutes = require('./routes/repository');
 const rankingRoutes = require('./routes/ranking');
 const watchlistRoutes = require('./routes/watchlist');
+const updateRoutes = require('./routes/update');
 
 // 导入中间件 - 临时注释掉来定位问题
 const { errorHandler } = require('./middleware/errorHandler');
@@ -114,16 +115,7 @@ function customLogger(req, res, next) {
         default:
           methodIcon = '❓';
       }
-
-      // 格式化时间
-      const now = new Date();
-      const timeStr = now.toLocaleTimeString('zh-CN', {
-        hour12: false,
-        hour: '2-digit',
-        minute: '2-digit',
-        second: '2-digit',
-      });
-
+      
       // 输出日志
       logger.info(`${statusIcon} ${methodIcon} ${method} ${url} ${statusCode} ${duration}ms`);
 
@@ -227,6 +219,7 @@ class PixivServer {
     this.app.use('/api/repository', repositoryRoutes); // 仓库管理，不需要认证
     this.app.use('/api/proxy', proxyRoutes); // 图片代理，不需要认证
     this.app.use('/api/watchlist', authMiddleware, watchlistRoutes); // 待看名单，需要认证
+    this.app.use('/api/update', updateRoutes); // 更新检查，不需要认证
 
     // 404 处理
     this.app.use((req, res) => {