feat: 添加音乐API代理以解决CORS跨域问题

- index.html: 将API_BASE改为相对路径 /api/music-api
- sync-server/server.js: 新增 /music-api 代理端点转发请求至 music-dl.sayqz.com
- 新增 proxyRequest 函数处理HTTPS代理请求和重定向

index.html

@@ -138,7 +138,7 @@
     <script type="text/babel">
         const { useState, useEffect, useRef, useMemo, useCallback } = React;
 
-        const API_BASE = "https://music-dl.sayqz.com";
+        const API_BASE = "/api/music-api";
         // Use relative path for sync service, assuming Nginx proxy is configured to forward /api/kv to the sync service
         const SYNC_API_BASE = "/api";
         

sync-server/server.js

@@ -32,6 +32,16 @@ const server = http.createServer((req, res) => {
     const parsedUrl = url.parse(req.url, true);
     const pathname = parsedUrl.pathname;
 
+    // --- Music API Proxy ---
+    // Proxy requests to music-dl.sayqz.com to avoid CORS issues
+    if (pathname === '/music-api' || pathname === '/music-api/') {
+        const queryString = parsedUrl.search || '';
+        const targetUrl = `https://music-dl.sayqz.com/api/${queryString}`;
+        
+        proxyRequest(targetUrl, req, res);
+        return;
+    }
+    
     // Path format: /kv/:key?token=...
     const match = pathname.match(/^\/kv\/([a-zA-Z0-9_-]+)$/);
     
@@ -298,6 +308,54 @@ function downloadFile(url, dest) {
     });
 }
 
+// --- Music API Proxy Function ---
+function proxyRequest(targetUrl, req, res) {
+    const parsedTarget = url.parse(targetUrl);
+    
+    const options = {
+        hostname: parsedTarget.hostname,
+        port: 443,
+        path: parsedTarget.path,
+        method: req.method,
+        headers: {
+            'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36',
+            'Accept': '*/*',
+            'Accept-Encoding': 'identity'
+        }
+    };
+
+    const proxyReq = https.request(options, (proxyRes) => {
+        // Handle redirects
+        if (proxyRes.statusCode >= 300 && proxyRes.statusCode < 400 && proxyRes.headers.location) {
+            // For redirects, return the redirect URL to client
+            res.writeHead(200, { 'Content-Type': 'application/json' });
+            res.end(JSON.stringify({ url: proxyRes.headers.location }));
+            return;
+        }
+
+        // Copy response headers (except problematic ones)
+        const headers = { ...proxyRes.headers };
+        delete headers['content-encoding'];
+        delete headers['transfer-encoding'];
+        
+        res.writeHead(proxyRes.statusCode, headers);
+        proxyRes.pipe(res);
+    });
+
+    proxyReq.on('error', (e) => {
+        console.error('[Proxy] Request error:', e.message);
+        res.writeHead(502, { 'Content-Type': 'application/json' });
+        res.end(JSON.stringify({ error: 'Proxy request failed', message: e.message }));
+    });
+
+    // Forward request body for POST requests
+    if (req.method === 'POST') {
+        req.pipe(proxyReq);
+    } else {
+        proxyReq.end();
+    }
+}
+
 function writeMetadata(inputPath, outputPath, metadata) {
     return new Promise((resolve, reject) => {
         const args = ['-i', inputPath];