perf+unify: matches 列表查询优化 + Standings 统一数据源

matches 列表:selectinload 加 load_only 限定列(League.code/Team.name,name_zh/
MatchStats.home_xg,away_xg),补 stats 加载消除 N+1(m.stats 此前懒加载)。
详情接口保持完整 options;游标分页/响应字段/空值语义不变。

Standings 改用 useLeagues() 统一数据源(API 优先,失败回退本地常量),
LEAGUES 常量扩展 CL/EL;无数据联赛显示虚线 tab + 空态(非隐藏)。

frontend/src/pages/Standings.tsx

@@ -8,18 +8,9 @@
 import { useEffect, useState, useCallback } from 'react'
 import { fetchStandings } from '../admin/dal'
 import type { StandingsLeague, StandingRow } from '../admin/dal'
+import { useLeagues } from './matches/hooks/useLeagues'
 import { Spinner } from '../admin/components'
 
-const LEAGUES = [
-  { code: 'E0', name: '英超' },
-  { code: 'SP1', name: '西甲' },
-  { code: 'D1', name: '德甲' },
-  { code: 'I1', name: '意甲' },
-  { code: 'F1', name: '法甲' },
-  { code: 'CL', name: '欧冠' },
-  { code: 'EL', name: '欧联' },
-]
-
 const ZONE_META: Record<string, { label: string; cls: string }> = {
   // 欧战资格
   'Champions League': { label: '欧冠区', cls: 'bg-emerald-100 text-emerald-700' },
@@ -64,7 +55,9 @@ function FormDots({ form }: { form?: string | null }) {
 }
 
 export default function StandingsPage() {
-  const [leagues, setLeagues] = useState<StandingsLeague[]>([])
+  // 统一数据源:复用 useLeagues hook(优先 API,失败回退本地常量)
+  const leagues = useLeagues()
+  const [standings, setStandings] = useState<StandingsLeague[]>([])
   const [activeLeague, setActiveLeague] = useState<string>('')
   const [loading, setLoading] = useState(true)
   const [switching, setSwitching] = useState(false)  // 切换联赛中
@@ -85,7 +78,7 @@ export default function StandingsPage() {
     setError(null)
     try {
       const data = await fetchStandings(code)
-      setLeagues(data.leagues)
+      setStandings(data.leagues)
       if (!activeLeague && data.leagues.length > 0) {
         setActiveLeague(data.leagues[0].league_code)
       }
@@ -104,7 +97,7 @@ export default function StandingsPage() {
     setSwitching(true)
     setActiveLeague(code)
     try {
-      await fetchStandings(code).then(data => setLeagues(data.leagues))
+      await fetchStandings(code).then(data => setStandings(data.leagues))
     } catch (err) {
       setError(err instanceof Error ? err.message : '加载失败')
     } finally {
@@ -112,26 +105,32 @@ export default function StandingsPage() {
     }
   }
 
-  const active = leagues.find(l => l.league_code === activeLeague) ?? leagues[0]
+  const active = standings.find(l => l.league_code === activeLeague) ?? standings[0]
 
   return (
     <div className="space-y-6">
       {/* 联赛切换 */}
       <div className="flex flex-wrap gap-2">
-        {LEAGUES.map(l => (
-          <button
-            key={l.code}
-            onClick={() => switchLeague(l.code)}
-            disabled={switching}
-            className={`rounded border px-3 py-1.5 text-xs transition-colors disabled:opacity-50 ${
-              activeLeague === l.code
-                ? 'border-ink-900 bg-ink-900 text-paper-50'
-                : 'border-ink-200 text-ink-500 hover:border-ink-300'
-            }`}
-          >
-            {l.name}
-          </button>
-        ))}
+        {leagues.map(l => {
+          // 标记该联赛是否有积分榜数据:有数据可正常切换,无数据也可选中但显示空态
+          const hasData = standings.some(s => s.league_code === l.code)
+          const isEmpty = activeLeague === l.code && !hasData
+          return (
+            <button
+              key={l.code}
+              onClick={() => switchLeague(l.code)}
+              disabled={switching}
+              title={hasData ? undefined : '暂无积分榜数据'}
+              className={`rounded border px-3 py-1.5 text-xs transition-colors disabled:opacity-50 ${
+                activeLeague === l.code
+                  ? 'border-ink-900 bg-ink-900 text-paper-50'
+                  : 'border-ink-200 text-ink-500 hover:border-ink-300'
+              } ${!hasData ? 'border-dashed' : ''}`}
+            >
+              {l.name}
+            </button>
+          )
+        })}
       </div>
 
       {error && (

frontend/src/pages/matches/types.ts

@@ -78,6 +78,8 @@ export const LEAGUES = [
   { code: 'D1', name: '德甲' },
   { code: 'I1', name: '意甲' },
   { code: 'F1', name: '法甲' },
+  { code: 'CL', name: '欧冠' },
+  { code: 'EL', name: '欧联' },
 ]
 
 /** 汉字编号,给专家意见排版用 */