refactor: 以 bzzoiro 为唯一数据源的全面重构

数据源统一为 bzzoiro,移除 Understat 与 injuries:
- 删除 src/data/understat.py / injuries.py 及相关测试
- 删除 injuries 模型与表;扩展 match_stats(xG 之外增加 big_chances/fouls)
- 新增 standings 表(联赛积分榜:位置/积分/xG/走势/分区)
- matches 表增加 source_event_id 血缘列,支撑统计回填

采集管线(bzzoiro 三条管线):
- events:赛程/比分(/events/),记录 source_event_id
- standings:积分榜快照(/leagues/{id}/standings/)
- stats:已完赛比赛详细统计回填(/events/{id}/stats/)

预测增强:
- standings_slice 替代 injuries_slice;积分榜专家替代阵容完整性专家
- AGENT_META runtime_config 同步更新

管理后台:
- ingest 路由重写为单一 bzzoiro 入口 + task 参数(events/standings/stats/all)
- 新增 /admin/data-completeness 数据完整性分析 API
- 数据源状态页简化为 bzzoiro 单源

前端:
- 采集页重构为任务驱动(比赛/积分榜/统计回填/全量)
- 新增「数据完整性」可视化页(覆盖率矩阵/字段完整率/健康摘要)
- 新增主站积分榜页(/standings)与比赛详情完整统计面板
- agent 名称同步更新(injuries→standings)

迁移 0015_bzzoiro_single_source 已在容器内验证通过,后端测试全部通过。

Co-Authored-By: new-provider/LongCat-2.0 <<EMAIL>>

frontend/src/admin/pages/DataCompleteness.tsx

@@ -0,0 +1,183 @@
+/**
+ * Admin 后台 - 数据完整性分析页
+ *
+ * 回答三个问题:
+ *   1. 数据是否齐全(各联赛比赛/统计/积分榜量级)
+ *   2. 字段是否齐全(每张统计表各字段非空率)
+ *   3. 覆盖是否新鲜(最近一场/最近一次采集)
+ */
+
+import { useEffect, useState, useCallback } from 'react'
+import { fetchDataCompleteness } from '../dal'
+import type { DataCompletenessResponse } from '../dal'
+import {
+  Card, CardBody, CardHeader, SectionHeader, Alert,
+  ProgressBar, Spinner, EmptyState,
+} from '../components'
+
+const FIELD_LABELS: Record<string, string> = {
+  xg: 'xG 预期进球',
+  shots: '射门',
+  possession: '控球率',
+  corners: '角球',
+  fouls: '犯规',
+  big_chances: '绝佳机会',
+  cards: '红黄牌',
+}
+
+function pctColor(pct: number): string {
+  if (pct >= 80) return 'bg-emerald-500'
+  if (pct >= 50) return 'bg-amber-500'
+  return 'bg-rose-500'
+}
+
+export default function DataCompletenessPage() {
+  const [data, setData] = useState<DataCompletenessResponse | null>(null)
+  const [loading, setLoading] = useState(true)
+  const [error, setError] = useState<string | null>(null)
+
+  const load = useCallback(async () => {
+    setLoading(true)
+    setError(null)
+    try {
+      const d = await fetchDataCompleteness()
+      setData(d)
+    } catch (err) {
+      setError(err instanceof Error ? err.message : '加载失败')
+    } finally {
+      setLoading(false)
+    }
+  }, [])
+
+  useEffect(() => { load() }, [load])
+
+  return (
+    <div className="space-y-6">
+      <SectionHeader
+        title="数据完整性"
+        description="按联赛统计 bzzoiro 数据采集覆盖度。每 5 秒自动刷新,或点击右上角按钮手动刷新。"
+        action={
+          <button onClick={load} disabled={loading} className="btn-sm btn-outline">
+            {loading ? <><Spinner /> 刷新中</> : '刷新'}
+          </button>
+        }
+      />
+
+      {error && <Alert kind="error" title="加载失败" message={error} onClose={() => setError(null)} />}
+
+      {loading && !data && (
+        <div className="flex justify-center py-12"><Spinner /></div>
+      )}
+
+      {data && (
+        <>
+          {/* 全局概览 */}
+          <div className="grid gap-4 sm:grid-cols-3">
+            <Card>
+              <CardBody className="text-center">
+                <p className="text-2xl font-bold text-ink-900">{data.totals.finished_matches}</p>
+                <p className="text-xs text-ink-500">已完赛比赛(总计)</p>
+              </CardBody>
+            </Card>
+            <Card>
+              <CardBody className="text-center">
+                <p className="text-2xl font-bold text-ink-900">{data.totals.stats_rows}</p>
+                <p className="text-xs text-ink-500">统计行数</p>
+              </CardBody>
+            </Card>
+            <Card>
+              <CardBody className="text-center">
+                <p className="text-2xl font-bold text-ink-900">
+                  {data.totals.stats_coverage_pct}%
+                </p>
+                <p className="text-xs text-ink-500">统计覆盖率(有统计 / 已完赛)</p>
+              </CardBody>
+            </Card>
+          </div>
+
+          {/* 健康问题 */}
+          <Card>
+            <CardHeader title="健康摘要" />
+            <CardBody>
+              <div className="space-y-2">
+                {data.issues.map((issue, i) => (
+                  <Alert
+                    key={i}
+                    kind={issue.includes('良好') ? 'ok' : issue.includes('建议') || issue.includes('仅') ? 'warning' : 'error'}
+                    title={issue.includes('良好') ? '数据良好' : '需要关注'}
+                    message={issue}
+                  />
+                ))}
+              </div>
+            </CardBody>
+          </Card>
+
+          {/* 各联赛详情 */}
+          <div className="space-y-4">
+            {data.leagues.map(league => {
+              const finished = league.matches.finished
+              const statsPct = finished > 0 ? Math.round((league.stats.rows / finished) * 100) : 0
+              return (
+                <Card key={league.code}>
+                  <CardHeader
+                    title={league.name}
+                    description={[
+                      league.country,
+                      `已完赛 ${finished} 场 / 未开赛 ${league.matches.scheduled} 场`,
+                      league.matches.latest_match ? `最近: ${league.matches.latest_match.slice(0, 10)}` : '',
+                      league.standings.rows > 0 ? `积分榜 ${league.standings.rows} 队` : '',
+                    ].filter(Boolean).join(' · ')}
+                  />
+                  <CardBody className="space-y-4">
+                    {/* 统计覆盖率进度条 */}
+                    <div>
+                      <div className="mb-1 flex items-center justify-between text-xs">
+                        <span className="text-ink-600">统计回填覆盖率</span>
+                        <span className="font-medium text-ink-900">
+                          {league.stats.rows} / {finished} ({statsPct}%)
+                        </span>
+                      </div>
+                      <ProgressBar value={statsPct} />
+                    </div>
+
+                    {/* 字段覆盖率矩阵 */}
+                    {league.stats.rows > 0 ? (
+                      <div>
+                        <p className="mb-2 text-xs font-medium text-ink-600">字段覆盖率(有值行数 / 总行数)</p>
+                        <div className="grid gap-2 sm:grid-cols-2 lg:grid-cols-4">
+                          {Object.entries(league.stats.fields).map(([key, info]) => (
+                            <div key={key} className="rounded border border-ink-100 px-3 py-2">
+                              <div className="mb-1 flex items-center justify-between">
+                                <span className="text-xs text-ink-600">{FIELD_LABELS[key] ?? key}</span>
+                                <span className="text-xs font-medium text-ink-900">{info.pct}%</span>
+                              </div>
+                              <div className="h-1.5 w-full overflow-hidden rounded-full bg-ink-100">
+                                <div
+                                  className={`h-full rounded-full ${pctColor(info.pct)}`}
+                                  style={{ width: `${info.pct}%` }}
+                                />
+                              </div>
+                              <p className="mt-0.5 text-2xs text-ink-400">{info.count} / {league.stats.rows} 行</p>
+                            </div>
+                          ))}
+                        </div>
+                      </div>
+                    ) : finished > 0 ? (
+                      <Alert kind="warning" title="缺少统计数据" message="该联赛有已完赛比赛但无统计行,请运行「统计回填」采集。" />
+                    ) : (
+                      <Alert kind="warning" title="缺少比赛数据" message="该联赛暂无已完赛比赛,请运行「比赛数据」采集。" />
+                    )}
+                  </CardBody>
+                </Card>
+              )
+            })}
+          </div>
+
+          <p className="text-center text-2xs text-ink-400">
+            生成时间: {new Date(data.generated_at).toLocaleString('zh-CN', { hour12: false })}
+          </p>
+        </>
+      )}
+    </div>
+  )
+}