DNF90 服务端与启动器完整源码（含 GM 工具功能增强）

服务端（Go）：
- GM 塞背包/带属性装备发放：在线角色推送 op14 增量物品行，背包实时刷新，无需回角色选择界面
- GM 改金币/改等级：去掉在线拒绝，落库后推送 op14 钱包/op37 等级状态，在线实时刷新
- 等级端点统一切换到新版 GMSetCharacterLevel（自带在线刷新）
- 无限/锁死疲劳模式 + 燃烧疲劳：每房间消耗 2 点、打怪与通关经验双倍
- 燃烧疲劳开关时给所有在线角色推送系统提示（op12 mode 0）
- 深渊史诗掉率：GM 全局倍率 + 城镇增益药剂窗口倍率，真实接入掉落结算

启动器（Python/JS）：
- 标题栏自绘、窗口 1204x717、禁止拖拽改大小、仅最小化/关闭
- GM 工具：疲劳与燃烧、深渊史诗掉率、拍卖行上架（单一定价对齐）
- 拍卖行上架前端对齐服务端单一价格语义，修复 400 报错

server/internal/services/dnfbridge/pvp_channel_info.go

@@ -0,0 +1,59 @@
+package dnfbridge
+
+import (
+	"strings"
+
+	"longheng.io/server/internal/modules/dnf/channelcatalog"
+	"longheng.io/server/internal/modules/dnf/dnfenum"
+)
+
+// DNF.exe 1EA4EDB and 1EA281D use 1CF3800, which reads the native channel
+// number and accepts 75..77. Type 41 is the DPL preliminary tournament and
+// additionally opens obsolete tournament assets; it is not this entry.
+func isCurrentPVPTotalChannel(channel channelcatalog.Channel) bool {
+	return isPVPChannel(channel) && channel.Type == 8 && channel.ID >= 75 && channel.ID <= 77
+}
+
+func isPVPChannel(channel channelcatalog.Channel) bool {
+	return strings.EqualFold(strings.TrimSpace(channel.Group), "pvp")
+}
+
+func (s *Service) freeDuelAvailable() bool {
+	if s == nil {
+		return false
+	}
+	catalog := s.currentCatalog()
+	if catalog == nil {
+		return false
+	}
+	for _, channel := range catalog.Channels() {
+		if isPVPChannel(channel) {
+			return true
+		}
+	}
+	return false
+}
+
+func (s *Service) handlePVPChannelInfo(session *gameSession, body []byte, transport string) error {
+	requestValid := len(body) == 0
+	success := requestValid && s.freeDuelAvailable()
+	response := []byte{0, 0x15}
+	if success {
+		response = []byte{1, 0, 0, 0, 0, 0}
+	}
+	if session != nil {
+		s.logGameEvent(session, "game-pvp-channel-info",
+			"transport", transport,
+			"body_len", len(body),
+			"available", s.freeDuelAvailable(),
+			"success", success,
+			"response_body", response)
+	}
+	return s.sendGameFixed15Route(
+		session,
+		byte(dnfenum.GameCmdCommand),
+		uint16(dnfenum.CmdPacketPVPChannelInfo),
+		response,
+		0,
+	)
+}