docs(subagent): restore refusal contract comment

docs/core-data-structures/subagent.i18n.yaml

@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write
-subagent.md: 8a134b7be641323057135bcf772bf4cccec5c9a3
-subagent.zh.md: a66ad6b6c3b503b81fac97387577a689848edad2
+subagent.md: 2497dbab9cfc8304eb7aaeba7109404ac614bbff
+subagent.zh.md: 2d96e9bc635951746e72ed58a7c3638dc2598cc2

docs/core-data-structures/subagent.md

@@ -135,6 +135,7 @@ interface SubagentStopReasonMap {
   error: 'error'
   /** The child hit its token ceiling before finishing. */
   'max-tokens': 'max-tokens'
+  /** The child declined the task. */
   refusal: 'refusal'
 }
 ```

docs/core-data-structures/subagent.zh.md

@@ -135,6 +135,7 @@ interface SubagentStopReasonMap {
   error: 'error'
   /** The child hit its token ceiling before finishing. */
   'max-tokens': 'max-tokens'
+  /** The child declined the task. */
   refusal: 'refusal'
 }
 ```