新增: 兑换复验功能

- 新增 exchangeList 接口查询斗鱼真实兑换记录
- 前端添加「兑换复验」标签页
- 点击「🔍 复验」按钮可查询所有账号的兑换记录
- 复验结果与软件内部状态对比，用于验证抢购结果
- 移除 frontend/dist 的 git 跟踪

app.go

@@ -210,6 +210,36 @@ func (a *App) QueryScore(accountName string) map[string]any {
 	return map[string]any{"score": score}
 }
 
+// VerifyExchange 查询兑换记录，用于复验抢购结果。
+func (a *App) VerifyExchange(accountName string) map[string]any {
+	if accountName == "" {
+		return map[string]any{"success": false, "error": "缺少账号名"}
+	}
+	cookie, ok := a.scheduler.AccountCookieByName(accountName)
+	if !ok || cookie == "" {
+		return map[string]any{"success": false, "error": fmt.Sprintf("账号不存在或 Cookie 为空: %s", accountName)}
+	}
+
+	records, err := a.client.ExchangeList(cookie)
+	if err != nil {
+		return map[string]any{"success": false, "error": "查询失败: " + err.Error()}
+	}
+
+	// 过滤当前活动的记录
+	var matched []client.ExchangeRecord
+	for _, r := range records {
+		if r.CommodityID != "" {
+			matched = append(matched, r)
+		}
+	}
+
+	return map[string]any{
+		"success": true,
+		"records": matched,
+		"count":   len(matched),
+	}
+}
+
 // GetVersion 返回应用版本号。
 func (a *App) GetVersion() string {
 	return constants.Version