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/epicbook/ledger_test.go

@@ -0,0 +1,55 @@
+package epicbook
+
+import (
+	"context"
+	"errors"
+	"math"
+	"testing"
+	"time"
+
+	dnfrepo "longheng.io/server/internal/modules/dnf/repository"
+	dnfrepomemory "longheng.io/server/internal/modules/dnf/repository/memory"
+)
+
+func TestAddFragmentPersistsAccountBalance(t *testing.T) {
+	repositories := dnfrepomemory.NewMemoryGroup()
+	if err := repositories.Inventory.Save(context.Background(), dnfrepo.InventoryRecord{CharacterID: "7"}); err != nil {
+		t.Fatal(err)
+	}
+	balance, err := AddFragment(context.Background(), repositories.EpicBookCraft, "account-1", "7", 101020256, 3, testTime())
+	if err != nil || balance != 3 {
+		t.Fatalf("AddFragment() balance=%d error=%v", balance, err)
+	}
+	balance, err = AddFragment(context.Background(), repositories.EpicBookCraft, "account-1", "7", 101020256, 2, testTime())
+	if err != nil || balance != 5 {
+		t.Fatalf("AddFragment() second balance=%d error=%v", balance, err)
+	}
+	record, found, err := repositories.EpicBook.Load(context.Background(), "account-1")
+	if err != nil || !found || record.Balances[101020256] != 5 {
+		t.Fatalf("stored record=%+v found=%t error=%v", record, found, err)
+	}
+}
+
+func TestAddFragmentRejectsOverflowWithoutMutation(t *testing.T) {
+	repositories := dnfrepomemory.NewMemoryGroup()
+	if err := repositories.Inventory.Save(context.Background(), dnfrepo.InventoryRecord{CharacterID: "7"}); err != nil {
+		t.Fatal(err)
+	}
+	if err := repositories.EpicBook.Save(context.Background(), dnfrepo.EpicBookRecord{
+		AccountID: "account-1",
+		Balances:  map[uint32]uint32{101020256: math.MaxUint32},
+	}); err != nil {
+		t.Fatal(err)
+	}
+	if _, err := AddFragment(context.Background(), repositories.EpicBookCraft, "account-1", "7", 101020256, 1, testTime()); !errors.Is(err, ErrBalanceOverflow) {
+		t.Fatalf("AddFragment() error=%v, want ErrBalanceOverflow", err)
+	}
+	record, _, _ := repositories.EpicBook.Load(context.Background(), "account-1")
+	if record.Balances[101020256] != math.MaxUint32 {
+		t.Fatalf("balance mutated to %d", record.Balances[101020256])
+	}
+}
+
+func testTime() (value time.Time) {
+	return time.Unix(1_700_000_000, 0).UTC()
+}