fix:批量修复了一些问题

frontend/src/admin/pages/Backtest.tsx

@@ -12,7 +12,7 @@
 
 import { useEffect, useState } from 'react'
 import { triggerBacktest, fetchEvalSummary, fetchLeagues } from '../dal'
-import type { BacktestRequest, EvalSummary, League } from '../types'
+import type { BacktestRequest, BacktestSummary, EvalSummary, League } from '../types'
 import { Card, CardBody, CardHeader, Badge, SectionHeader, Alert, Spinner } from '../components'
 import TeamSideTag from '../../components/TeamSideTag'
 
@@ -34,18 +34,43 @@ interface BacktestResultRow {
 }
 
 interface BacktestResponse {
-  summary: {
-    total: number
-    scored: number
-    accuracy_1x2?: number
-    avg_score_rmse?: number
-    avg_subjective_confidence?: number
-  }
+  summary: BacktestSummary
   results: BacktestResultRow[]
 }
 
 const OUTCOME_LABEL: Record<string, string> = { '1': '主胜', X: '平局', '2': '客胜' }
 
+/** 导出回测明细为 CSV(UTF-8 BOM,Excel 可直接打开) */
+function exportCsv(rows: BacktestResultRow[]) {
+  const header = [
+    "比赛日期", "联赛", "主队", "客队", "实际比分", "实际1X2",
+    "预测主球", "预测客球", "预测1X2", "主观置信度", "1X2命中",
+  ]
+  const lines = [header.join(",")]
+  for (const r of rows) {
+    lines.push([
+      fmtDate(r.match_date), r.league_code ?? "",
+      csvCell(r.home_team_zh || r.home_team), csvCell(r.away_team_zh || r.away_team),
+      r.actual_score, r.actual_1x2 ?? "",
+      r.pred_home ?? "", r.pred_away ?? "", r.pred_1x2 ?? "",
+      r.subjective_confidence != null ? String(Math.round(r.subjective_confidence * 100)) : "",
+      r.correct_1x2 ? "是" : "否",
+    ].join(","))
+  }
+  const blob = new Blob(["" + lines.join("\n")], { type: "text/csv;charset=utf-8" })
+  const url = URL.createObjectURL(blob)
+  const a = document.createElement("a")
+  a.href = url
+  a.download = `backtest_${new Date().toISOString().slice(0, 10)}.csv`
+  a.click()
+  URL.revokeObjectURL(url)
+}
+
+/** CSV 字段转义:含逗号/引号/换行时加引号 */
+function csvCell(v: string): string {
+  return /[",\n]/.test(v) ? `"${v.replace(/"/g, '""')}"` : v
+}
+
 function fmtDate(s?: string | null): string {
   if (!s) return '—'
   return s.slice(0, 10)
@@ -58,6 +83,7 @@ export default function BacktestPage() {
   const [dateTo, setDateTo] = useState('')
   const [limit, setLimit] = useState(20)
   const [mode, setMode] = useState<'single' | 'multi'>('single')
+  const [model, setModel] = useState('')
   const [loading, setLoading] = useState(false)
   const [error, setError] = useState<string | null>(null)
   const [result, setResult] = useState<BacktestResponse | null>(null)
@@ -90,6 +116,7 @@ export default function BacktestPage() {
         date_to: dateTo || undefined,
         limit,
         mode,
+        model: model.trim() || undefined,
       }
       const res = await triggerBacktest(req as BacktestRequest)
       setResult(res as unknown as BacktestResponse)
@@ -177,6 +204,19 @@ export default function BacktestPage() {
                 </div>
               </div>
 
+              <div>
+                <label className="mb-1.5 block text-xs text-ink-500">
+                  指定模型(可选,空=默认 <code className="font-mono">gpt-4o</code>)
+                </label>
+                <input
+                  type="text"
+                  value={model}
+                  onChange={e => setModel(e.target.value)}
+                  placeholder="如 deepseek-chat / 留空使用默认"
+                  className="field w-full"
+                />
+              </div>
+
               {error && <Alert kind="error" title="回测失败" message={error} onClose={() => setError(null)} />}
 
               <button type="submit" disabled={loading} className="btn btn-solid w-full">
@@ -190,15 +230,31 @@ export default function BacktestPage() {
         <div className="space-y-6">
           {summary && (
             <Card>
-              <CardHeader title="回测结果" />
+              <CardHeader
+                title="回测结果"
+                description={`模式: ${mode}${model ? ` · 模型: ${model}` : ''} · 限 ${limit} 场`}
+                action={
+                  result?.results?.length
+                    ? (<button onClick={() => exportCsv(result.results)} className="btn btn-sm">导出 CSV</button>)
+                    : undefined
+                }
+              />
               <CardBody>
-                <div className="grid grid-cols-2 gap-4 sm:grid-cols-4">
+                <div className="grid grid-cols-2 gap-4 sm:grid-cols-3">
                   <div>
                     <div className="font-serif text-2xl font-bold tabular-nums text-ink-900">
                       {summary.scored}/{summary.total}
                     </div>
                     <div className="mt-1 text-2xs text-ink-400">已评分 / 总场数</div>
                   </div>
+                  <div>
+                    <div className="font-serif text-2xl font-bold tabular-nums text-ink-900">
+                      {summary.success}/{summary.degraded}
+                    </div>
+                    <div className="mt-1 text-2xs text-ink-400">
+                      成功 / 降级<span className="text-ink-300"> (degraded)</span>
+                    </div>
+                  </div>
                   <div>
                     <div className="font-serif text-2xl font-bold tabular-nums text-press">
                       {summary.accuracy_1x2 !== undefined && summary.accuracy_1x2 !== null
@@ -223,6 +279,11 @@ export default function BacktestPage() {
                     </div>
                     <div className="mt-1 text-2xs text-ink-400">平均置信度</div>
                   </div>
+                  {summary.degraded > 0 && (
+                    <div className="col-span-full border-l-2 border-press bg-press-wash/40 px-3 py-2 text-2xs leading-relaxed text-press-dark">
+                      有 {summary.degraded} 场预测降级(专家无有效结论),未计入准确率分子。建议检查该时段数据完整性或改用单次模式。
+                    </div>
+                  )}
                 </div>
               </CardBody>
             </Card>