Add a Sleep GPU button that stops Comfy to free VRAM.

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

server/api/comfy/sleep.post.ts

@@ -0,0 +1,22 @@
+import { listJobs } from '~/server/utils/jobs'
+import { listOwnersWithStudioQueues, listStudioJobs } from '~/server/utils/studioQueue'
+import { requestComfySleep } from '~/server/utils/comfyLifecycle'
+
+export default defineEventHandler(async () => {
+  const live = listJobs().filter(job => job.status === 'queued' || job.status === 'uploading' || job.status === 'running')
+  if (live.length) {
+    throw createError({
+      statusCode: 409,
+      statusMessage: 'A job is still running. Cancel it first, then sleep the GPU.'
+    })
+  }
+  for (const owner of listOwnersWithStudioQueues()) {
+    if (listStudioJobs(owner).some(job => job.status === 'running')) {
+      throw createError({
+        statusCode: 409,
+        statusMessage: 'A job is still running. Cancel it first, then sleep the GPU.'
+      })
+    }
+  }
+  return await requestComfySleep()
+})