feat: add RetryFailedButton component and API endpoint for retrying failed queue jobs

src/app/admin/queue/page.tsx

@@ -1,5 +1,6 @@
 import { priceUpdateQueue, maintenanceQueue, schedulerQueue } from '@/lib/queue'
 import { formatDistanceToNow } from 'date-fns'
+import RetryFailedButton from '@/components/admin/RetryFailedButton'
 
 export const dynamic = 'force-dynamic'
 
@@ -89,6 +90,7 @@ export default async function AdminQueuePage() {
           <div className="flex items-center justify-between px-4 py-3 border-b border-surface-border">
             <h3 className="font-medium text-sm">{q.name}</h3>
             <div className="flex items-center gap-3 text-xs">
+              <RetryFailedButton queueName={q.name} count={q.failed} />
               <Badge label="waiting" count={q.waiting} color="slate" />
               <Badge label="active" count={q.active} color="indigo" />
               <Badge label="delayed" count={q.delayed} color="amber" />

src/app/api/admin/queues/[name]/route.ts

@@ -0,0 +1,40 @@
+import { NextRequest, NextResponse } from 'next/server'
+import { getServerSession } from 'next-auth'
+import { authOptions } from '@/lib/auth'
+import { priceUpdateQueue, maintenanceQueue, schedulerQueue } from '@/lib/queue'
+import { Queue } from 'bullmq'
+
+const QUEUES: Record<string, Queue> = {
+  'hashex-price-updates': priceUpdateQueue,
+  'hashex-maintenance': maintenanceQueue,
+  'hashex-scheduler': schedulerQueue,
+}
+
+export async function POST(
+  req: NextRequest,
+  { params }: { params: { name: string } }
+) {
+  const session = await getServerSession(authOptions)
+  if (!session?.user?.isAdmin) {
+    return NextResponse.json({ error: 'Forbidden' }, { status: 403 })
+  }
+
+  const queue = QUEUES[params.name]
+  if (!queue) {
+    return NextResponse.json({ error: 'Queue not found' }, { status: 404 })
+  }
+
+  const { action } = await req.json() as { action: string }
+
+  if (action === 'retry-failed') {
+    await queue.retryJobs({ count: 100, state: 'failed' })
+    return NextResponse.json({ ok: true })
+  }
+
+  if (action === 'clean-failed') {
+    await queue.clean(0, 100, 'failed')
+    return NextResponse.json({ ok: true })
+  }
+
+  return NextResponse.json({ error: 'Unknown action' }, { status: 400 })
+}

src/components/admin/RetryFailedButton.tsx

@@ -0,0 +1,41 @@
+'use client'
+
+import { useState } from 'react'
+import { useRouter } from 'next/navigation'
+
+export default function RetryFailedButton({
+  queueName,
+  count,
+}: {
+  queueName: string
+  count: number
+}) {
+  const [loading, setLoading] = useState(false)
+  const router = useRouter()
+
+  if (count === 0) return null
+
+  async function handleRetry() {
+    setLoading(true)
+    try {
+      await fetch(`/api/admin/queues/${encodeURIComponent(queueName)}`, {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({ action: 'retry-failed' }),
+      })
+    } finally {
+      router.refresh()
+      setLoading(false)
+    }
+  }
+
+  return (
+    <button
+      onClick={handleRetry}
+      disabled={loading}
+      className="text-xs px-2 py-1 rounded bg-red-500/20 text-red-400 hover:bg-red-500/30 disabled:opacity-50 transition-colors"
+    >
+      {loading ? 'Retrying…' : `Retry ${count} failed`}
+    </button>
+  )
+}