refactor(deliverables): reuse the chain claim test for the mention vocabulary

packages/client/ui-deliverables/src/client/index.ts

@@ -12,7 +12,7 @@ import type { ChatFileMentions } from '@deepseek-ai/dsh-client-ui-conversation/c
 import type {} from '@deepseek-ai/dsh-client-locale/client'
 import { ProducedFiles } from './ProducedFiles.tsx'
 import { en, NS, zh, type DeliverablesKey } from './locales.ts'
-import { producedFileMentions, producedForClosing, selectProducedFiles } from './turn-deliverables.ts'
+import { producedFileMentions, selectProducedFiles } from './turn-deliverables.ts'
 
 declare module '@deepseek-ai/dsh-client-ui-slots' {
   interface LocaleNamespaceMap {
@@ -46,8 +46,10 @@ export function apply(ctx: ClientContext): void {
   const t = ctx.locale.bind(NS)
   const mentions: ChatFileMentions = {
     forClosing(owner) {
-      const paths = producedForClosing(owner.nodes, owner.seq)
-      if (paths.length === 0) return undefined
+      // Same claim test the turn-tail chain entry runs: no produced files,
+      // no vocabulary — the two surfaces agree by construction.
+      const paths = selectProducedFiles(owner)
+      if (paths === null) return undefined
       return producedFileMentions(paths, owner.openFile, path => t('produced.open', { name: path }))
     },
   }