bug修复和架构完善

backend/routes/proxy.js

@@ -0,0 +1,52 @@
+const express = require('express');
+const router = express.Router();
+const axios = require('axios');
+
+/**
+ * 图片代理
+ * GET /api/proxy/image
+ */
+router.get('/image', async (req, res) => {
+  try {
+    const { url } = req.query;
+    
+    if (!url) {
+      return res.status(400).json({
+        success: false,
+        error: 'Image URL is required'
+      });
+    }
+
+    const response = await axios({
+      method: 'GET',
+      url: decodeURIComponent(url),
+      responseType: 'stream',
+      headers: {
+        'Referer': 'https://www.pixiv.net/',
+        'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.124 Safari/537.36'
+      },
+      timeout: 30000
+    });
+
+    // 设置响应头
+    res.set({
+      'Content-Type': response.headers['content-type'],
+      'Cache-Control': 'public, max-age=3600', // 缓存1小时
+      'Access-Control-Allow-Origin': '*',
+      'Access-Control-Allow-Methods': 'GET',
+      'Access-Control-Allow-Headers': 'Content-Type'
+    });
+
+    // 流式传输图片数据
+    response.data.pipe(res);
+
+  } catch (error) {
+    console.error('Image proxy error:', error.message);
+    res.status(500).json({
+      success: false,
+      error: 'Failed to load image'
+    });
+  }
+});
+
+module.exports = router;