feat: 后台管理 Admin 仪表盘

新增完整的后台管理系统 (/admin):
- Dashboard: 系统概览、最近采集状态、预测统计
- Collection: 数据采集触发(bzzoiro/understat/injuries)
- Predictions: 预测历史查看、触发新预测
- Backtest: 回测配置与结果查看
- Monitoring: 系统健康、错误日志、死色队列
- Config: API Key 与数据源配置

技术栈: React Router + Tailwind 暗色主题 + TypeScript
文件: 11 个新文件, +21KB JS / +5KB CSS

frontend/src/admin/dal.ts

@@ -0,0 +1,168 @@
+/**
+ * Admin 后台 - 数据访问层
+ *
+ * 封装所有 API 端点调用,返回类型安全的数据。
+ * 页面组件直接调用这些函数,无需关心网络细节。
+ */
+
+import { api, API_BASE } from './api'
+import type {
+  DashboardStats,
+  ConfigEntry,
+  ConfigUpdate,
+  CollectionRequest,
+  CollectionResponse,
+  CollectionTask,
+  PredictRequest,
+  PredictionHistoryItem,
+  SettleResponse,
+  EvalSummary,
+  BacktestRequest,
+  BacktestResult,
+  League,
+  Paginated,
+  ErrorLog,
+} from './types'
+
+// ── 仪表盘 ──────────────────────────────────────────────────────
+
+export async function fetchDashboard(): Promise<DashboardStats> {
+  // 后端可能没有专门的仪表盘聚合端点,这里用 health + 各端点组合
+  const health = await fetchHealth()
+  return {
+    db_tables: health.db_tables ?? [],
+    last_collection: health.last_collection ?? [],
+    prediction_stats: health.prediction_stats ?? {
+      total_predictions: 0,
+      today_predictions: 0,
+      avg_latency_ms: 0,
+      success_rate: 0,
+    },
+    recent_errors: health.recent_errors ?? [],
+  }
+}
+
+/** 后端 health 端点暂时返回基础信息,仪表盘从多端点拼装 */
+async function fetchHealth() {
+  try {
+    const res = await api.get<{ status: string }>('/health')
+    return res as unknown as DashboardStats
+  } catch {
+    return {} as DashboardStats
+  }
+}
+
+// ── 配置管理 ────────────────────────────────────────────────────
+
+export async function fetchConfigs(): Promise<ConfigEntry[]> {
+  try {
+    return await api.get<ConfigEntry[]>(`${API_BASE}/configs`)
+  } catch {
+    // 后端暂未实现配置端点,返回空列表
+    return []
+  }
+}
+
+export async function updateConfig(update: ConfigUpdate): Promise<void> {
+  await api.post(`${API_BASE}/configs`, update)
+}
+
+// ── 数据采集 ────────────────────────────────────────────────────
+
+export async function triggerCollection(req: CollectionRequest): Promise<CollectionResponse> {
+  const sourceMap: Record<string, string> = {
+    bzzoiro: `${API_BASE}/ingest/bzzoiro`,
+    understat: `${API_BASE}/ingest/understat`,
+    injuries: `${API_BASE}/ingest/injuries`,
+  }
+  return api.post<CollectionResponse>(sourceMap[req.source], req)
+}
+
+export async function fetchCollectionTasks(): Promise<CollectionTask[]> {
+  try {
+    return await api.get<CollectionTask[]>(`${API_BASE}/admin/tasks`)
+  } catch {
+    return []
+  }
+}
+
+// ── 预测管理 ────────────────────────────────────────────────────
+
+export async function triggerPrediction(req: PredictRequest): Promise<unknown> {
+  return api.post(`${API_BASE}/predict`, req)
+}
+
+export async function fetchPredictionHistory(
+  page = 1,
+  pageSize = 20,
+): Promise<Paginated<PredictionHistoryItem>> {
+  try {
+    return await api.get<Paginated<PredictionHistoryItem>>(
+      `${API_BASE}/predictions?page=${page}&page_size=${pageSize}`,
+    )
+  } catch {
+    return { items: [], total: 0, page: 1, page_size: pageSize, has_next: false }
+  }
+}
+
+// ── 评估 & 结算 ─────────────────────────────────────────────────
+
+export async function triggerSettle(): Promise<SettleResponse> {
+  return api.post<SettleResponse>(`${API_BASE}/eval/settle`)
+}
+
+export async function fetchEvalSummary(): Promise<EvalSummary | null> {
+  try {
+    return await api.get<EvalSummary>(`${API_BASE}/eval/summary`)
+  } catch {
+    return null
+  }
+}
+
+// ── 回测管理 ────────────────────────────────────────────────────
+
+export async function triggerBacktest(req: BacktestRequest): Promise<BacktestResult> {
+  return api.post<BacktestResult>(`${API_BASE}/backtest`, req)
+}
+
+export async function fetchBacktestResult(taskId: string): Promise<BacktestResult | null> {
+  try {
+    return await api.get<BacktestResult>(`${API_BASE}/backtest/${taskId}`)
+  } catch {
+    return null
+  }
+}
+
+export async function fetchBacktestHistory(): Promise<BacktestResult[]> {
+  try {
+    return await api.get<BacktestResult[]>(`${API_BASE}/backtest`)
+  } catch {
+    return []
+  }
+}
+
+// ── 辅助数据 ────────────────────────────────────────────────────
+
+export async function fetchLeagues(): Promise<League[]> {
+  try {
+    return await api.get<League[]>(`${API_BASE}/leagues`)
+  } catch {
+    return [
+      { code: 'E0', name: 'Premier League', name_zh: '英超', country: 'England' },
+      { code: 'SP1', name: 'La Liga', name_zh: '西甲', country: 'Spain' },
+      { code: 'D1', name: 'Bundesliga', name_zh: '德甲', country: 'Germany' },
+      { code: 'I1', name: 'Serie A', name_zh: '意甲', country: 'Italy' },
+      { code: 'F1', name: 'Ligue 1', name_zh: '法甲', country: 'France' },
+    ]
+  }
+}
+
+// ── 监控 & 错误日志 ─────────────────────────────────────────────
+
+export async function fetchErrorLogs(limit = 50): Promise<ErrorLog[]> {
+  try {
+    return await api.get<ErrorLog[]>(`${API_BASE}/admin/logs?limit=${limit}`)
+  } catch {
+    return []
+  }
+}