采集任务支持手动触发 + 定时调度(cron)

后端:
- 新增 Scheduler + ScheduledTask 核心模块(croniter 解析 cron 表达式)
- 新增 Schedule 数据模型(alembic 0016)
- 新增 /api/v1/admin/schedules CRUD 接口
- lifespan 启动时注册默认定时任务并加载数据库配置
- 默认任务:每日比赛/积分榜/30分钟统计回填(默认禁用)

前端:
- 设置页新增「定时任务」管理区块
- 支持:新建/启用禁用/立即执行/删除定时任务
- 显示:任务ID、类型、cron表达式、上次执行时间/状态

依赖:新增 croniter>=2.0

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

frontend/src/admin/pages/Settings.tsx

@@ -13,7 +13,9 @@ import {
   fetchSettings, updateSetting, clearSetting,
   testLLMConnection, fetchLLMUsageStats, fetchLLMModels,
   fetchKeyRingStatus, resetKeyRingCooldown,
+  fetchSchedules, createSchedule, updateSchedule, deleteSchedule, runScheduleNow,
 } from '../dal'
+import type { ScheduleItem } from '../dal'
 import { changePassword, fetchAuthState, UNAUTHORIZED_EVENT } from '../api'
 import type { LLMUsageStats, DataSourceSetting } from '../types'
 import type { KeyRingStatusResponse } from '../dal'
@@ -49,6 +51,10 @@ export default function SettingsPage() {
   const [pwdBusy, setPwdBusy] = useState(false)
   const [pwdNotice, setPwdNotice] = useState<{ ok: boolean; text: string } | null>(null)
 
+  // 定时任务
+  const [schedules, setSchedules] = useState<ScheduleItem[]>([])
+  const [schedulesLoading, setSchedulesLoading] = useState(true)
+
   // ── 数据加载 ──
   const loadSettings = useCallback(async () => {
     setSettingsLoading(true)
@@ -89,6 +95,7 @@ export default function SettingsPage() {
     loadLlmStats()
     loadKeyRing()
     fetchAuthState().then(s => setPasswordOrigin(s.password_origin ?? null)).catch(() => {})
+    fetchSchedules().then(setSchedules).catch(() => []).finally(() => setSchedulesLoading(false))
   }, [loadSettings, loadLlmStats, loadKeyRing])
 
   const dataSourceSettings = allSettings.filter(s => DATA_SOURCE_KEYS.includes(s.key))
@@ -362,6 +369,76 @@ export default function SettingsPage() {
           </CardBody>
         </Card>
       </section>
+
+      {/* ── 4. 定时任务 ── */}
+      <section>
+        <h2 className="section-head mb-3">定时任务</h2>
+        <Card>
+          <CardHeader
+            title="采集调度"
+            description="配置 cron 表达式定时触发采集任务"
+            action={
+              <button
+                onClick={() => {
+                  createSchedule({ id: `schedule-${Date.now()}`, task: 'events', cron: '0 8 * * *', leagues: undefined, enabled: false })
+                    .then(() => fetchSchedules().then(setSchedules))
+                }}
+                className="btn btn-sm"
+              >
+                + 新建
+              </button>
+            }
+          />
+          <CardBody>
+            {schedulesLoading ? (
+              <SkeletonBlock className="h-10 w-full" />
+            ) : schedules.length === 0 ? (
+              <p className="py-6 text-center text-xs text-ink-400">暂无定时任务,点击右上角「+ 新建」创建</p>
+            ) : (
+              <div className="space-y-2">
+                {schedules.map(s => (
+                  <div key={s.id} className="flex flex-col gap-2 border-b border-ink-100 py-3 last:border-b-0 sm:flex-row sm:items-center sm:justify-between">
+                    <div className="flex-1 space-y-1">
+                      <div className="flex items-center gap-2">
+                        <span className={`inline-block h-2 w-2 rounded-full ${s.enabled ? 'bg-emerald-500' : 'bg-ink-300'}`} />
+                        <span className="text-xs font-medium text-ink-800">{s.id}</span>
+                        <Badge status={s.enabled ? 'success' : 'muted'}>{s.task}</Badge>
+                      </div>
+                      <p className="font-mono text-2xs text-ink-500">{s.cron}</p>
+                      {s.last_run_at && (
+                        <p className="text-2xs text-ink-400">
+                          上次: {new Date(s.last_run_at).toLocaleString('zh-CN', { hour12: false })}
+                          {s.last_status === 'success' ? ' ✓' : s.last_status === 'failed' ? ' ✗' : ''}
+                        </p>
+                      )}
+                    </div>
+                    <div className="flex items-center gap-2">
+                      <button
+                        onClick={() => runScheduleNow(s.id)}
+                        className="btn btn-sm"
+                      >
+                        立即执行
+                      </button>
+                      <button
+                        onClick={() => updateSchedule(s.id, { enabled: !s.enabled }).then(() => fetchSchedules().then(setSchedules))}
+                        className={`btn btn-sm ${s.enabled ? '' : 'btn-solid'}`}
+                      >
+                        {s.enabled ? '禁用' : '启用'}
+                      </button>
+                      <button
+                        onClick={() => deleteSchedule(s.id).then(() => fetchSchedules().then(setSchedules))}
+                        className="btn btn-sm btn-danger"
+                      >
+                        删除
+                      </button>
+                    </div>
+                  </div>
+                ))}
+              </div>
+            )}
+          </CardBody>
+        </Card>
+      </section>
     </div>
   )
 }