Wire Qwen 2.1 as Generate-only engine with 25/1 sampler defaults.

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

utils/loras.ts

@@ -283,7 +283,7 @@ export function kleinLoraOnKreaMessage(name: string) {
   return imageLoraEngineMismatchMessage(name, 'krea')
 }
 
-export type LoraUse = 'minimax' | 'ltx' | 'flux' | 'krea'
+export type LoraUse = 'minimax' | 'ltx' | 'flux' | 'krea' | 'qwen21'
 
 export function isSystemGraphLora(name: string) {
   const id = loraIdentityKey(name)
@@ -301,16 +301,19 @@ export function inferLoraUse(name: string): LoraUse[] | null {
   if (/ltx/.test(value)) uses.push('ltx')
   if (/klein|flux/.test(value)) uses.push('flux')
   if (/krea/.test(value)) uses.push('krea')
+  if (/qwen/.test(value)) uses.push('qwen21')
   return uses.length ? uses : null
 }
 
 export function loraMatchesUse(name: string, use: LoraUse) {
+  if (use === 'qwen21') return false
   return !isSystemGraphLora(name) && !!inferLoraUse(name)?.includes(use)
 }
 
 /** Saved stacks may contain unlabelled adapters; never carry a known wrong engine. */
 export function filterLoraStackForUse(stack: unknown, use: LoraUse, xaigen: boolean) {
   if (use === 'ltx' && !xaigen) return []
+  if (use === 'qwen21') return []
   return filterLoraStackForStudio(stack, xaigen).filter(item => {
     const uses = inferLoraUse(item.name)
     return !isSystemGraphLora(item.name) && (!uses || uses.includes(use))
@@ -318,6 +321,7 @@ export function filterLoraStackForUse(stack: unknown, use: LoraUse, xaigen: bool
 }
 
 export function filterLorasForUse(names: string[], use: LoraUse) {
+  if (use === 'qwen21') return []
   return names.filter(name => loraMatchesUse(name, use))
 }