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/skill_switch_inventory_protocol.go

@@ -0,0 +1,95 @@
+package dnfbridge
+
+import (
+	"encoding/binary"
+	"fmt"
+	"sort"
+)
+
+const (
+	skillSwitchInventoryCmdWire     uint16 = 0x0594
+	skillSwitchInventoryDeltaWire   uint16 = 0x0558
+	skillSwitchInventoryAllDataWire uint16 = 0x0559
+	skillSwitchInventoryBodySize           = 6
+	skillSwitchClearListType        byte   = 44
+	skillSwitchClearSlot            uint16 = 0xffff
+	skillSwitchSkillPart            byte   = 33
+)
+
+type skillSwitchInventoryRequest struct {
+	SkillID       uint16
+	EquipmentPart byte
+	ListType      byte
+	Slot          uint16
+}
+
+type skillSwitchInventoryAction byte
+
+const (
+	skillSwitchSetItem skillSwitchInventoryAction = iota + 1
+	skillSwitchRemoveItem
+	skillSwitchSetSkill
+)
+
+func decodeSkillSwitchInventoryRequest(body []byte) (skillSwitchInventoryRequest, skillSwitchInventoryAction, error) {
+	if len(body) != skillSwitchInventoryBodySize {
+		return skillSwitchInventoryRequest{}, 0, fmt.Errorf("skill-switch body length=%d want=%d", len(body), skillSwitchInventoryBodySize)
+	}
+	r := skillSwitchInventoryRequest{
+		SkillID:       binary.LittleEndian.Uint16(body[0:2]),
+		EquipmentPart: body[2],
+		ListType:      body[3],
+		Slot:          binary.LittleEndian.Uint16(body[4:6]),
+	}
+	if r.EquipmentPart == skillSwitchSkillPart {
+		if r.ListType != skillSwitchClearListType || r.Slot != skillSwitchClearSlot {
+			return skillSwitchInventoryRequest{}, 0, fmt.Errorf("skill-switch skill sentinel mismatch list=%d slot=%#x", r.ListType, r.Slot)
+		}
+		return r, skillSwitchSetSkill, nil
+	}
+	if r.EquipmentPart > 32 {
+		return skillSwitchInventoryRequest{}, 0, fmt.Errorf("skill-switch equipment part=%d out of range", r.EquipmentPart)
+	}
+	if r.ListType == skillSwitchClearListType || r.Slot == skillSwitchClearSlot {
+		if r.ListType != skillSwitchClearListType || r.Slot != skillSwitchClearSlot {
+			return skillSwitchInventoryRequest{}, 0, fmt.Errorf("skill-switch remove sentinel mismatch list=%d slot=%#x", r.ListType, r.Slot)
+		}
+		return r, skillSwitchRemoveItem, nil
+	}
+	return r, skillSwitchSetItem, nil
+}
+
+type skillSwitchBinding struct {
+	EquipmentPart byte   `json:"equipment_part"`
+	ItemSerial    uint32 `json:"item_serial"`
+	ItemID        uint32 `json:"item_id"`
+}
+
+type skillSwitchInventoryState struct {
+	SkillID uint16               `json:"skill_id"`
+	Items   []skillSwitchBinding `json:"items,omitempty"`
+}
+
+func (s skillSwitchInventoryState) sortedItems() []skillSwitchBinding {
+	items := append([]skillSwitchBinding(nil), s.Items...)
+	sort.Slice(items, func(i, j int) bool { return items[i].EquipmentPart < items[j].EquipmentPart })
+	return items
+}
+
+func buildSkillSwitchAllDataBody(state skillSwitchInventoryState, positions map[byte]skillSwitchInventoryPosition) []byte {
+	items := state.sortedItems()
+	valid := make([]skillSwitchInventoryPosition, 0, len(items))
+	for _, item := range items {
+		if p, ok := positions[item.EquipmentPart]; ok {
+			valid = append(valid, p)
+		}
+	}
+	result := make([]byte, 3, 3+len(valid)*5)
+	binary.LittleEndian.PutUint16(result[:2], state.SkillID)
+	for _, p := range valid {
+		result = append(result, 1, p.EquipmentPart, p.ListType, 0, 0)
+		binary.LittleEndian.PutUint16(result[len(result)-2:], uint16(p.Slot))
+	}
+	result[2] = byte(len(valid))
+	return result
+}