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/modules/dnf/itemlock/body.go

@@ -0,0 +1,70 @@
+package itemlock
+
+import "encoding/binary"
+
+const (
+	msgItemLockList     uint16 = 0x00FB
+	msgItemUnlockNotice uint16 = 0x00FC
+
+	itemLockStateActive  byte = 1
+	itemLockStatePending byte = 2
+)
+
+// LockListMessageID is the class-0 notification that replaces the client's
+// complete item-lock cache for the selected character.
+const LockListMessageID = msgItemLockList
+
+type packetWriter struct {
+	data []byte
+}
+
+func (w *packetWriter) writeByte(value byte) {
+	w.data = append(w.data, value)
+}
+
+func (w *packetWriter) writeUint16(value uint16) {
+	var buf [2]byte
+	binary.LittleEndian.PutUint16(buf[:], value)
+	w.data = append(w.data, buf[:]...)
+}
+
+func (w *packetWriter) writeInt16(value int16) {
+	w.writeUint16(uint16(value))
+}
+
+func (w *packetWriter) writeInt32(value int32) {
+	var buf [4]byte
+	binary.LittleEndian.PutUint32(buf[:], uint32(value))
+	w.data = append(w.data, buf[:]...)
+}
+
+func (w *packetWriter) bytes() []byte {
+	return append([]byte(nil), w.data...)
+}
+
+func buildLockAck(listType byte, slotIndex int16) []byte {
+	var writer packetWriter
+	writer.writeByte(listType)
+	writer.writeInt16(slotIndex)
+	return writer.bytes()
+}
+
+func buildUnlockAck(listType byte, slotIndex int16, remainingSeconds int32) []byte {
+	var writer packetWriter
+	writer.writeByte(listType)
+	writer.writeInt16(slotIndex)
+	writer.writeInt32(remainingSeconds)
+	return writer.bytes()
+}
+
+func buildLockListDelta(listType byte, slotIndex int16, state byte, remainingSeconds int32) []byte {
+	var writer packetWriter
+	writer.writeUint16(1)
+	writer.writeByte(listType)
+	writer.writeInt16(slotIndex)
+	writer.writeByte(state)
+	if state == 2 {
+		writer.writeInt32(remainingSeconds)
+	}
+	return writer.bytes()
+}