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/protocol/channel_test.go

@@ -0,0 +1,129 @@
+package protocol
+
+import (
+	"bytes"
+	"encoding/hex"
+	"errors"
+	"testing"
+)
+
+func TestBuildAndParseChannelPacket(t *testing.T) {
+	body := []byte{1, 2, 3}
+	got, err := BuildChannelPacket(1, body, 7, DefaultChannelClassification)
+	if err != nil {
+		t.Fatalf("build channel packet: %v", err)
+	}
+
+	want := mustHex(t, "0101001000000028a15aee0700010203")
+	if !bytes.Equal(got, want) {
+		t.Fatalf("channel packet mismatch:\n got %x\nwant %x", got, want)
+	}
+
+	packet, err := ParseChannelPacket(got)
+	if err != nil {
+		t.Fatalf("parse channel packet: %v", err)
+	}
+	if packet.Header.Classification != DefaultChannelClassification ||
+		packet.Header.MsgID != 1 ||
+		packet.Header.Length != uint32(len(got)) ||
+		packet.Header.Checksum != 3998916904 ||
+		packet.Header.Seq != 7 {
+		t.Fatalf("unexpected header: %+v", packet.Header)
+	}
+	if !bytes.Equal(packet.Body, body) {
+		t.Fatalf("body mismatch: got %x", packet.Body)
+	}
+}
+
+func TestParseChannelPacketRejectsChecksum(t *testing.T) {
+	packet, err := BuildChannelPacket(1, []byte{1, 2, 3}, 7, DefaultChannelClassification)
+	if err != nil {
+		t.Fatalf("build channel packet: %v", err)
+	}
+	packet[len(packet)-1] ^= 255
+
+	if _, err := ParseChannelPacket(packet); !errors.Is(err, ErrChecksumInvalid) {
+		t.Fatalf("expected checksum error, got %v", err)
+	}
+}
+
+func TestParseChannelPacketUncheckedAcceptsCodecUpper(t *testing.T) {
+	raw := mustHex(t, "01b2021d00000038ab3cdc000015b101e6d58515bd9dbb3490ac32e75a")
+
+	if _, err := ParseChannelPacket(raw); !errors.Is(err, ErrChecksumInvalid) {
+		t.Fatalf("strict parse error = %v, want checksum invalid", err)
+	}
+	packet, err := ParseChannelPacketUnchecked(raw)
+	if err != nil {
+		t.Fatalf("unchecked parse: %v", err)
+	}
+	if packet.Header.MsgID != 0x02b2 || packet.Header.Length != uint32(len(raw)) || len(packet.Body) != 16 {
+		t.Fatalf("packet header=%+v body_len=%d", packet.Header, len(packet.Body))
+	}
+}
+
+func TestBuildGameServerUpperPacketUsesChannel13Header(t *testing.T) {
+	body := []byte{1, 2, 3}
+	got, err := BuildGameServerUpperPacket(1, body, 7, DefaultChannelClassification)
+	if err != nil {
+		t.Fatalf("build game server upper packet: %v", err)
+	}
+
+	if len(got) != GameServerUpperHeaderSize+len(body) {
+		t.Fatalf("packet len = %d", len(got))
+	}
+	if got[0] != DefaultChannelClassification {
+		t.Fatalf("classification = %d", got[0])
+	}
+	if got[1] != 1 || got[2] != 0 {
+		t.Fatalf("msg bytes = %x", got[1:3])
+	}
+	if !bytes.Equal(got[GameServerUpperHeaderSize:], body) {
+		t.Fatalf("body mismatch: got %x", got[GameServerUpperHeaderSize:])
+	}
+}
+
+func TestBuildGameServerUpperPacketAllowsServer16Header(t *testing.T) {
+	body := []byte{1, 2, 3}
+	got, err := BuildGameServerUpperPacketWithHeaderSize(1, body, 7, DefaultChannelClassification, GameServerUpperHeaderSize16)
+	if err != nil {
+		t.Fatalf("build game server upper packet: %v", err)
+	}
+
+	if len(got) != GameServerUpperHeaderSize16+len(body) {
+		t.Fatalf("packet len = %d", len(got))
+	}
+	if got[13] != 0 || got[14] != 0 || got[15] != 0 {
+		t.Fatalf("reserved bytes = %x", got[13:16])
+	}
+	if !bytes.Equal(got[GameServerUpperHeaderSize16:], body) {
+		t.Fatalf("body mismatch: got %x", got[GameServerUpperHeaderSize16:])
+	}
+}
+
+func TestBuildGameServerUpperPacketAllowsSecondaryClass(t *testing.T) {
+	body := []byte{2, 0x20, 0}
+	got, err := BuildGameServerUpperPacket(2, body, 7, 0)
+	if err != nil {
+		t.Fatalf("build game server secondary upper packet: %v", err)
+	}
+
+	if got[0] != 0 {
+		t.Fatalf("classification = %d, want 0", got[0])
+	}
+	if got[1] != 2 || got[2] != 0 {
+		t.Fatalf("msg bytes = %x", got[1:3])
+	}
+	if !bytes.Equal(got[GameServerUpperHeaderSize:], body) {
+		t.Fatalf("body mismatch: got %x", got[GameServerUpperHeaderSize:])
+	}
+}
+
+func mustHex(t *testing.T, value string) []byte {
+	t.Helper()
+	data, err := hex.DecodeString(value)
+	if err != nil {
+		t.Fatalf("decode hex: %v", err)
+	}
+	return data
+}