fix: cancel parse requests when modal is closed

点击取消解析时，清空 PQueue 队列并中断正在进行的请求。

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

internal/bilibili/video.go

@@ -4,6 +4,7 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
+	"io"
 	"math/rand"
 	"strconv"
 	"strings"
@@ -80,11 +81,24 @@ func (client *BiliClient) GetPlayInfo(bvid string, cid int) (*PlayInfo, error) {
 	if err != nil {
 		return nil, err
 	}
-	body := BaseResV2{}
-	err = json.NewDecoder(response.Body).Decode(&body)
+	defer response.Body.Close()
+
+	// 读取响应体用于调试
+	bodyBytes, err := io.ReadAll(response.Body)
 	if err != nil {
 		return nil, err
 	}
+
+	body := BaseResV2{}
+	err = json.Unmarshal(bodyBytes, &body)
+	if err != nil {
+		// 返回更详细的错误信息
+		preview := string(bodyBytes)
+		if len(preview) > 200 {
+			preview = preview[:200] + "..."
+		}
+		return nil, fmt.Errorf("JSON解析失败，响应内容: %s", preview)
+	}
 	if body.Code != 0 {
 		return nil, errors.New(body.Message)
 	}