fix: 修复HTTP代理响应读取和URL解析错误

正确处理HTTP代理CONNECT响应，逐行读取直到空行以避免读取越界；
检查url.Parse返回的错误，防止解析失败时设置无效Cookie。

api/http.go

@@ -130,12 +130,15 @@ func setupCookies(client *http.Client, req *HttpRequest) {
 	if len(req.Cookies) == 0 {
 		return
 	}
+	parsedURL, err := url.Parse(req.URL)
+	if err != nil {
+		return
+	}
 	cookieJar, _ := cookiejar.New(nil)
 	var cookieList []*http.Cookie
 	for name, value := range req.Cookies {
 		cookieList = append(cookieList, &http.Cookie{Name: name, Value: value})
 	}
-	parsedURL, _ := url.Parse(req.URL)
 	cookieJar.SetCookies(parsedURL, cookieList)
 	client.Jar = cookieJar
 }

api/socket.go

@@ -1,10 +1,12 @@
 package api
 
 import (
+	"bufio"
 	"fmt"
 	"net"
 	"net/http"
 	"net/url"
+	"strings"
 	"sync"
 	"time"
 
@@ -319,38 +321,34 @@ func httpConnectProxy(target, proxyAddr string) (net.Conn, error) {
 		return nil, err
 	}
 
-	// 读取响应
-	buf := make([]byte, 1024)
-	n, err := conn.Read(buf)
+	// 读取响应（直到遇到空行）
+	reader := bufio.NewReader(conn)
+	line, err := reader.ReadString('\n')
 	if err != nil {
 		conn.Close()
 		return nil, err
 	}
 
 	// 检查 200 状态
-	resp := string(buf[:n])
-	if !contains(resp, "200") {
+	if !strings.Contains(line, "200") {
 		conn.Close()
-		return nil, fmt.Errorf("代理连接失败: %s", resp)
+		return nil, fmt.Errorf("代理连接失败: %s", strings.TrimSpace(line))
+	}
+
+	// 读取剩余响应头直到空行
+	for {
+		line, err := reader.ReadString('\n')
+		if err != nil {
+			break
+		}
+		if line == "\r\n" || line == "\n" {
+			break
+		}
 	}
 
 	return conn, nil
 }
 
-// contains 检查字符串是否包含子串
-func contains(s, substr string) bool {
-	return len(s) >= len(substr) && (s == substr || len(s) > 0 && containsSubstr(s, substr))
-}
-
-func containsSubstr(s, substr string) bool {
-	for i := 0; i <= len(s)-len(substr); i++ {
-		if s[i:i+len(substr)] == substr {
-			return true
-		}
-	}
-	return false
-}
-
 // tcpBufSize TCP 读取缓冲区大小，64KB 覆盖绝大多数调试场景
 const tcpBufSize = 64 << 10