feat: M3-M7 全模块落地 + 集成接线

- M3 认证/权限/审计/限流 + 全部 REST 接口
- M4 管理面板（MIUIx + 成绩录入/积分榜下钻/大屏控制）
- M5a 大屏页面（六页 + 明细覆盖层 + 缩放适配）
- M6 WebSocket 实时同步中心
- M7 xlsx 导出 + 赛事包 zip + 备份
- 规则包 YAML 导入导出（差异预览）
- 字体 vendor 子集化（4 套 x2 字重）
- 集成：realtime/export/rules 接入 main+httpapi；backup 子命令
- 修复：中间件包装 ResponseWriter 丢失 Hijacker，导致 WS 握手 501

server/internal/export/team.go

@@ -0,0 +1,98 @@
+package export
+
+import (
+	"database/sql"
+	"io"
+	"strconv"
+
+	"github.com/xuri/excelize/v2"
+
+	"git.yeij.top/AskaEth/Scoreboard/server/internal/domain"
+)
+
+// TeamDetailRow 是单位积分明细的一行：一分一行的得分来源。
+type TeamDetailRow struct {
+	SportName   string
+	EventName   string
+	Category    string
+	AthleteName string
+	Rank        int
+	ResultText  string
+	Source      string
+	Points      float64
+	Remark      string
+}
+
+// TeamDetailWorkbook 是「单位积分明细」的内容。
+type TeamDetailWorkbook struct {
+	Meta Meta
+	Team domain.Team
+	Rows []TeamDetailRow
+}
+
+var teamDetailColumns = []column{
+	{"序号", 6, kindInt},
+	{"大项", 14, kindText},
+	{"小项", 18, kindText},
+	{"组别", 14, kindText},
+	{"运动员", 14, kindText},
+	{"名次", 7, kindCenter},
+	{"成绩", 12, kindCenter},
+	{"来源", 12, kindCenter},
+	{"积分", 8, kindNumber},
+	{"备注", 20, kindText},
+}
+
+// ExportTeamDetailXLSX 导出某单位的积分明细（逐项列出得分来源）。
+func ExportTeamDetailXLSX(db *sql.DB, teamID int64, dst string, opts Options) error {
+	wb, err := LoadTeamDetailWorkbook(db, teamID, opts)
+	if err != nil {
+		return err
+	}
+	f, err := teamDetailFile(wb)
+	if err != nil {
+		return err
+	}
+	return saveWorkbook(f, dst)
+}
+
+// WriteTeamDetailXLSX 把单位积分明细写成 xlsx 流。
+func WriteTeamDetailXLSX(w io.Writer, wb TeamDetailWorkbook) error {
+	f, err := teamDetailFile(wb)
+	if err != nil {
+		return err
+	}
+	return f.Write(w)
+}
+
+func teamDetailFile(wb TeamDetailWorkbook) (*excelize.File, error) {
+	return buildWorkbook("积分明细", func(f *excelize.File, st *styleSet) error {
+		meta := wb.Meta.normalized()
+		name := sanitizeSheetName(displayName(wb.Team.Name, wb.Team.ShortName) + "积分明细")
+		if err := addSheet(f, name); err != nil {
+			return err
+		}
+		title := sheetTitle(meta, displayName(wb.Team.Name, wb.Team.ShortName)+" · 积分明细")
+		return writeSheet(f, st, name, meta, title, teamDetailColumns, teamDetailRows(wb.Rows))
+	})
+}
+
+func teamDetailRows(rows []TeamDetailRow) [][]any {
+	out := make([][]any, 0, len(rows)+1)
+	var total float64
+	for i, r := range rows {
+		total += r.Points
+		rank := ""
+		if r.Rank > 0 {
+			rank = strconv.Itoa(r.Rank)
+		}
+		out = append(out, []any{
+			i + 1, r.SportName, r.EventName, r.Category, r.AthleteName,
+			rank, r.ResultText, r.Source, r.Points, r.Remark,
+		})
+	}
+	if len(rows) > 0 {
+		out = append(out, []any{"合计", "", "", "", "", "", "", "", total, ""})
+	}
+	return out
+}