perf: 筛选统计去掉 JSON 兜底，并补上 orders 覆盖索引

去掉 work_orders 堆访问后，JOIN 会把 orders 整表扫进 Hash Right Join。
领取页在快照新鲜时不再打上游；快手出网统一 10 秒超时。倒计时改为自适应间隔。

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/frontend/src/components/DeadlineCountdown.tsx

@@ -1,30 +1,18 @@
 import { Tag } from 'antd'
 import { useEffect, useState } from 'react'
 
-export function DeadlineCountdown({
-  deadlineAt,
-  showExpired: _showExpired = false,
-}: {
-  deadlineAt: string
-  showExpired?: boolean
-}) {
+import { resolveDeadlineCountdown } from '@/utils/deadline-countdown'
+
+export function DeadlineCountdown({ deadlineAt }: { deadlineAt: string }) {
   const [now, setNow] = useState(() => Date.now())
+  const view = resolveDeadlineCountdown(deadlineAt, now)
 
   useEffect(() => {
-    const timer = window.setInterval(() => setNow(Date.now()), 1000)
+    const timer = window.setInterval(() => setNow(Date.now()), view.tickMs)
     return () => window.clearInterval(timer)
-  }, [])
+  }, [view.tickMs])
 
-  const remainingMs = new Date(deadlineAt).getTime() - now
-  if (remainingMs <= 0) {
-    return <Tag color="red">已超时</Tag>
-  }
-  const totalSeconds = Math.floor(remainingMs / 1000)
-  const minutes = Math.floor(totalSeconds / 60)
-  const seconds = totalSeconds % 60
-  const label = minutes > 0 ? `${minutes} 分 ${seconds} 秒` : `${seconds} 秒`
-  const color = remainingMs < 10 * 60 * 1000 ? 'orange' : 'blue'
-  return <Tag color={color}>剩余 {label}</Tag>
+  return <Tag color={view.color}>{view.label}</Tag>
 }
 
 export function formatTimeoutPolicyLabel(policy?: string) {