feat(ST-1111.10c): forward worker presence events on solo SSE + initial count

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/api/realtime/solo/route.ts

@@ -49,12 +49,23 @@ type JobPayload = {
   error?: string
 }
 
-type NotifyPayload = EntityPayload | JobPayload
+type WorkerPayload = {
+  type: 'worker_connected' | 'worker_disconnected'
+  user_id: string
+  token_id: string
+  product_id?: string
+}
+
+type NotifyPayload = EntityPayload | JobPayload | WorkerPayload
 
 function isJobPayload(p: NotifyPayload): p is JobPayload {
   return 'type' in p && (p.type === 'claude_job_enqueued' || p.type === 'claude_job_status')
 }
 
+function isWorkerPayload(p: NotifyPayload): p is WorkerPayload {
+  return 'type' in p && (p.type === 'worker_connected' || p.type === 'worker_disconnected')
+}
+
 function shouldEmit(
   payload: NotifyPayload,
   productId: string,
@@ -65,6 +76,10 @@ function shouldEmit(
     return payload.user_id === userId && payload.product_id === productId
   }
 
+  if (isWorkerPayload(payload)) {
+    return payload.user_id === userId
+  }
+
   // M11 (ST-1104): question-events horen op /api/realtime/notifications, niet hier.
   if (payload.entity === 'question') return false
 
@@ -187,6 +202,11 @@ export async function GET(request: NextRequest) {
         enqueue(`event: claude_jobs_initial\ndata: ${JSON.stringify(activeJobs)}\n\n`)
       }
 
+      // Stale workers opruimen + actieve count sturen
+      await prisma_workers_cleanup()
+      const workerCount = await prisma_workers_count(userId)
+      enqueue(`event: workers_initial\ndata: ${JSON.stringify({ count: workerCount })}\n\n`)
+
       // Heartbeat als SSE-comment — voorkomt proxy-timeouts
       heartbeatTimer = setInterval(() => {
         enqueue(`: heartbeat\n\n`)
@@ -251,3 +271,22 @@ async function prisma_jobs_findActive(userId: string, productId: string) {
     error: j.error ?? undefined,
   }))
 }
+
+const WORKER_STALE_MS = 60_000
+
+async function prisma_workers_cleanup() {
+  const { prisma } = await import('@/lib/prisma')
+  await prisma.claudeWorker.deleteMany({
+    where: { last_seen_at: { lt: new Date(Date.now() - WORKER_STALE_MS) } },
+  })
+}
+
+async function prisma_workers_count(userId: string): Promise<number> {
+  const { prisma } = await import('@/lib/prisma')
+  return prisma.claudeWorker.count({
+    where: {
+      user_id: userId,
+      last_seen_at: { gt: new Date(Date.now() - 15_000) },
+    },
+  })
+}