Add a Scale to 1 MP toggle on image edit before Klein.

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

server/utils/comfy.ts

@@ -51,6 +51,34 @@ export async function comfyFetch(path: string, init?: RequestInit) {
   }
 }
 
+/** true = installed, false = missing, null = Comfy unreachable / object_info failed */
+export async function comfyHasClassType(classType: string): Promise<boolean | null> {
+  try {
+    const res = await comfyFetch(`/object_info/${encodeURIComponent(classType)}`, {
+      signal: AbortSignal.timeout(8000)
+    })
+    if (res.status === 404) return false
+    if (!res.ok) return null
+    const body = await res.json().catch(() => null)
+    if (!body || typeof body !== 'object') return false
+    const rec = body as Record<string, unknown>
+    if (rec[classType] && typeof rec[classType] === 'object') return true
+    return String(rec.name || rec.class_type || '') === classType
+  } catch {
+    return null
+  }
+}
+
+export const IMAGE_SCALE_TO_TOTAL_PIXELS = 'ImageScaleToTotalPixels'
+export const IMAGE_SCALE_MISSING_MESSAGE = 'Scale Image to Total Pixels (ImageScaleToTotalPixels) is not installed on Beast. Turn Scale to 1 MP off, or install the node.'
+
+export async function assertImageScaleToTotalPixelsNode() {
+  const present = await comfyHasClassType(IMAGE_SCALE_TO_TOTAL_PIXELS)
+  if (present === false) {
+    throw createError({ statusCode: 400, statusMessage: IMAGE_SCALE_MISSING_MESSAGE })
+  }
+}
+
 export async function uploadImage(file: { filename: string; data: Buffer; type?: string }, jobId?: string) {
   const body = new FormData()
   const blob = new Blob([new Uint8Array(file.data)], { type: file.type || 'application/octet-stream' })