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/party_fanout_write_boundary_test.go

@@ -0,0 +1,41 @@
+package dnfbridge
+
+import (
+	"fmt"
+	"testing"
+
+	"longheng.io/server/internal/modules/dnf/dnfenum"
+)
+
+// TestSwallowPeerFanoutWriteKeepsTheOriginFailureBoundary pins the rule that a
+// fan-out write failure belongs to the session that was being written:
+//
+//   - another session's failed write is recorded and swallowed, so a stale peer
+//     can never tear down the session that is serving the player;
+//   - the origin's OWN failed write still reports the error, because
+//     game_session_events.go relies on that error to release a blocked Read and
+//     run connection cleanup;
+//   - an unattributable target (no origin known) also keeps the error, which is
+//     the behaviour every caller had before this rule existed.
+func TestSwallowPeerFanoutWriteKeepsTheOriginFailureBoundary(t *testing.T) {
+	service := &Service{options: options{gameUpperBodyCodec: gameUpperBodyCodecPlain}}
+	origin := &gameSession{connID: "origin", selectedCharacterID: 1}
+	target := &gameSession{connID: "game-000333", selectedCharacterID: 37}
+	writeErr := fmt.Errorf("set tcp 10.1.0.16:10023: use of closed network connection")
+
+	if err := service.swallowPeerFanoutWrite(origin, target, "unit", uint16(dnfenum.CmdPacketRequestPeer), nil); err != nil {
+		t.Fatalf("a write that did not fail must stay nil, got %v", err)
+	}
+	if err := service.swallowPeerFanoutWrite(origin, target, "unit", uint16(dnfenum.CmdPacketRequestPeer), writeErr); err != nil {
+		t.Fatalf("another session's failed write must not fail the origin, got %v", err)
+	}
+	if err := service.swallowPeerFanoutWrite(origin, origin, "unit", uint16(dnfenum.CmdPacketRequestPeer), writeErr); err != writeErr {
+		t.Fatalf("the origin's own failed write must keep its error, got %v", err)
+	}
+	if err := service.swallowPeerFanoutWrite(nil, target, "unit", uint16(dnfenum.CmdPacketRequestPeer), writeErr); err != writeErr {
+		t.Fatalf("an unattributable target must keep the error, got %v", err)
+	}
+	if err := service.swallowPeerFanoutWrite(origin, nil, "unit", uint16(dnfenum.CmdPacketRequestPeer), writeErr); err != writeErr {
+		t.Fatalf("a missing target must keep the error, got %v", err)
+	}
+}