Replace Comfy YuE with standalone YuEGP profile 1

scripts/gpu-proxy.mjs

@@ -9,7 +9,7 @@ function reply(res, status, body) {
 }
 
 /** Streams Comfy HTTP/WebSocket traffic; all mutations require the current reservation. */
-export function createGpuProxy({ target, reservation, authorized = () => true, markWork = () => {} }) {
+export function createGpuProxy({ target, reservation, authorized = () => true, markWork = () => {}, externalBusy = () => false }) {
   const server = http.createServer(async (req, res) => {
     const path = new URL(req.url || '/', 'http://localhost').pathname.replace(/\/+$/, '') || '/'
     // A global history list can expose another studio's prompts and outputs.
@@ -55,6 +55,7 @@ export function createGpuProxy({ target, reservation, authorized = () => true, m
     try {
       if (req.method === 'GET' || req.method === 'HEAD') await forward()
       else {
+        if (externalBusy()) { req.resume(); return reply(res, 409, { error: { message: 'YuEGP is using the GPU.' }, code: 'GPU_BUSY' }) }
         if (!authorized(req)) { req.resume(); return reply(res, 401, { error: 'Unauthorized' }) }
         await reservation.permit(String(req.headers['x-aigen-gpu-lease'] || ''), async () => { markWork(); await forward() })
       }