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/inventory/amplify_request.go

@@ -0,0 +1,86 @@
+package inventory
+
+import "fmt"
+
+const (
+	investAmplifyActionInvest   byte = 0
+	investAmplifyActionTwist    byte = 1
+	investAmplifyActionPureGold byte = 2
+)
+
+// PurifyItemRequest is the exact 12-byte current-NoPack class1/op204 request.
+type PurifyItemRequest struct {
+	TargetSlotIndex        int16
+	TargetItemTemplateID   int32
+	MaterialSlotIndex      int16
+	MaterialItemTemplateID int32
+}
+
+// InvestItemAmplifyOptionRequest is the current-NoPack class1/op205 request.
+// Action 2 appends one i32-length ASCII DSTR after the 14-byte fixed prefix.
+type InvestItemAmplifyOptionRequest struct {
+	Action                 byte
+	TargetSlotIndex        int16
+	TargetItemTemplateID   int32
+	MaterialSlotIndex      int16
+	MaterialItemTemplateID int32
+	SelectedOption         byte
+	TargetItemName         string
+}
+
+func DecodePurifyItemRequest(body []byte) (PurifyItemRequest, error) {
+	const size = 12
+	if len(body) != size {
+		return PurifyItemRequest{}, fmt.Errorf("purify item body length %d, want %d", len(body), size)
+	}
+	request := PurifyItemRequest{
+		TargetSlotIndex:        readI16(body, 0),
+		TargetItemTemplateID:   readI32(body, 2),
+		MaterialSlotIndex:      readI16(body, 6),
+		MaterialItemTemplateID: readI32(body, 8),
+	}
+	if request.TargetSlotIndex < 0 || request.MaterialSlotIndex < 0 || request.TargetItemTemplateID <= 0 || request.MaterialItemTemplateID <= 0 {
+		return PurifyItemRequest{}, fmt.Errorf("purify item identity invalid: target=(%d,%d) material=(%d,%d)", request.TargetSlotIndex, request.TargetItemTemplateID, request.MaterialSlotIndex, request.MaterialItemTemplateID)
+	}
+	return request, nil
+}
+
+func DecodeInvestItemAmplifyOptionRequest(body []byte) (InvestItemAmplifyOptionRequest, error) {
+	const fixedSize = 14
+	if len(body) < fixedSize {
+		return InvestItemAmplifyOptionRequest{}, shortBodyError(len(body), fixedSize)
+	}
+	request := InvestItemAmplifyOptionRequest{
+		Action:                 body[0],
+		TargetSlotIndex:        readI16(body, 1),
+		TargetItemTemplateID:   readI32(body, 3),
+		MaterialSlotIndex:      readI16(body, 7),
+		MaterialItemTemplateID: readI32(body, 9),
+		SelectedOption:         body[13],
+	}
+	if request.Action > investAmplifyActionPureGold {
+		return InvestItemAmplifyOptionRequest{}, fmt.Errorf("invest amplify action %d invalid", request.Action)
+	}
+	if request.TargetSlotIndex < 0 || request.MaterialSlotIndex < 0 || request.TargetItemTemplateID <= 0 || request.MaterialItemTemplateID <= 0 {
+		return InvestItemAmplifyOptionRequest{}, fmt.Errorf("invest amplify identity invalid: target=(%d,%d) material=(%d,%d)", request.TargetSlotIndex, request.TargetItemTemplateID, request.MaterialSlotIndex, request.MaterialItemTemplateID)
+	}
+	if request.Action != investAmplifyActionPureGold {
+		if len(body) != fixedSize {
+			return InvestItemAmplifyOptionRequest{}, fmt.Errorf("invest amplify action %d body length %d, want %d", request.Action, len(body), fixedSize)
+		}
+		return request, nil
+	}
+	if len(body) < fixedSize+4 {
+		return InvestItemAmplifyOptionRequest{}, shortBodyError(len(body), fixedSize+4)
+	}
+	nameLength := readI32(body, fixedSize)
+	if nameLength < 0 {
+		return InvestItemAmplifyOptionRequest{}, fmt.Errorf("invest amplify target name length %d invalid", nameLength)
+	}
+	end := fixedSize + 4 + int(nameLength)
+	if end < fixedSize+4 || len(body) != end {
+		return InvestItemAmplifyOptionRequest{}, fmt.Errorf("invest amplify action 2 body length %d, want %d", len(body), end)
+	}
+	request.TargetItemName = string(body[fixedSize+4 : end])
+	return request, nil
+}