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/darkknightcombo/repository.go

@@ -0,0 +1,125 @@
+package darkknightcombo
+
+import (
+	"context"
+	"encoding/base64"
+	"fmt"
+	"sort"
+	"strings"
+	"time"
+
+	dnfrepo "longheng.io/server/internal/modules/dnf/repository"
+)
+
+const (
+	settingsFormatKey   = "format"
+	settingsFormatValue = "dark-knight-combo-pages-v1"
+	settingsPagePrefix  = "page_"
+)
+
+func SettingsScope(characterID string) string {
+	return "character:" + strings.TrimSpace(characterID) + ":dark_knight_combo"
+}
+
+func LoadPages(ctx context.Context, repo dnfrepo.SettingsRepository, characterID string) ([]Page, bool, error) {
+	characterID = strings.TrimSpace(characterID)
+	if repo == nil || characterID == "" {
+		return nil, false, fmt.Errorf("dark knight combo settings repository is unavailable")
+	}
+	record, found, err := repo.Load(ctx, SettingsScope(characterID))
+	if err != nil || !found {
+		return nil, found, err
+	}
+	if record.Values[settingsFormatKey] != settingsFormatValue {
+		return nil, false, fmt.Errorf("unsupported dark knight combo settings format")
+	}
+	pages := make([]Page, 0, MaximumPageCount)
+	for pageIndex := 0; pageIndex < MaximumPageCount; pageIndex++ {
+		encoded := strings.TrimSpace(record.Values[fmt.Sprintf("%s%d", settingsPagePrefix, pageIndex)])
+		if encoded == "" {
+			continue
+		}
+		block, decodeErr := base64.StdEncoding.Strict().DecodeString(encoded)
+		if decodeErr != nil {
+			return nil, false, fmt.Errorf("decode dark knight combo page %d: %w", pageIndex, decodeErr)
+		}
+		page, parseErr := ParsePageBlock(block)
+		if parseErr != nil {
+			return nil, false, fmt.Errorf("decode dark knight combo page %d: %w", pageIndex, parseErr)
+		}
+		if int(page.Index) != pageIndex {
+			return nil, false, fmt.Errorf("decode dark knight combo page %d: page index=%d", pageIndex, page.Index)
+		}
+		pages = append(pages, page)
+	}
+	if len(pages) == 0 {
+		return nil, false, nil
+	}
+	return pages, true, nil
+}
+
+func SavePages(ctx context.Context, repo dnfrepo.SettingsRepository, characterID string, pages []Page, updatedAt time.Time) error {
+	record, err := BuildSettingsRecord(characterID, pages, updatedAt)
+	if err != nil {
+		return err
+	}
+	if repo == nil {
+		return ErrPageBlockInvalid
+	}
+	return repo.Save(ctx, record)
+}
+
+// BuildSettingsRecord encodes both independent combo pages without writing
+// them. Character creation uses this builder so the combo state is committed
+// in the same aggregate transaction as the new character and its skill state.
+func BuildSettingsRecord(characterID string, pages []Page, updatedAt time.Time) (dnfrepo.SettingsRecord, error) {
+	characterID = strings.TrimSpace(characterID)
+	if characterID == "" || len(pages) == 0 || len(pages) > MaximumPageCount {
+		return dnfrepo.SettingsRecord{}, ErrPageBlockInvalid
+	}
+	values := map[string]string{settingsFormatKey: settingsFormatValue}
+	sorted := append([]Page(nil), pages...)
+	sort.Slice(sorted, func(left, right int) bool { return sorted[left].Index < sorted[right].Index })
+	for _, page := range sorted {
+		block, err := EncodePageBlock(page)
+		if err != nil {
+			return dnfrepo.SettingsRecord{}, err
+		}
+		key := fmt.Sprintf("%s%d", settingsPagePrefix, page.Index)
+		if _, exists := values[key]; exists {
+			return dnfrepo.SettingsRecord{}, ErrPageBlockInvalid
+		}
+		values[key] = base64.StdEncoding.EncodeToString(block)
+	}
+	return dnfrepo.SettingsRecord{
+		Scope:     SettingsScope(characterID),
+		Values:    values,
+		UpdatedAt: updatedAt.UTC(),
+	}, nil
+}
+
+func SavePage(ctx context.Context, repo dnfrepo.SettingsRepository, characterID string, page Page, updatedAt time.Time) error {
+	page, err := NormalizePage(page)
+	if err != nil {
+		return err
+	}
+	pages, found, err := LoadPages(ctx, repo, characterID)
+	if err != nil {
+		return err
+	}
+	if !found {
+		pages = nil
+	}
+	replaced := false
+	for index := range pages {
+		if pages[index].Index == page.Index {
+			pages[index] = page
+			replaced = true
+			break
+		}
+	}
+	if !replaced {
+		pages = append(pages, page)
+	}
+	return SavePages(ctx, repo, characterID, pages, updatedAt)
+}