修正回合绑定失败被说成回包丢失

- ResponseDeliveryFailure 新增 interrupt_reason，按 cause 给回合终态说明
- 只有 response-write-failed 保留「执行许可回包丢失」；turn-bind-mismatch 改为说明回合绑定不一致、作用域无法确认
- 新增 response_delivery_failure_texts_match_their_cause 用例钉住两句文案
- 同步更新 shared-memory 决策记录里的收束说明口径

apps/ai-game-creator-shell/src-tauri/src/agent/codex_app_server/execution.rs

@@ -322,6 +322,19 @@ impl ResponseDeliveryFailure {
             Self::TurnBindMismatch => "turn-bind-mismatch",
         }
     }
+
+    /// 写进回合终态说明的收束原因。
+    ///
+    /// 两种失败对用户的意义不同：写失败是回包真的没送出去；绑定不一致是回包已经产出，只是宿主
+    /// 无法确认它属于哪一轮。不能共用「回包丢失」这一句，否则报告会把绑定问题说成丢包。
+    fn interrupt_reason(self) -> &'static str {
+        match self {
+            Self::Write => "执行许可回包丢失，不能确认原操作是否已执行。",
+            Self::TurnBindMismatch => {
+                "回合绑定与当前 app-server 不一致，无法确认本轮操作的作用域；已停止本轮执行。"
+            }
+        }
+    }
 }
 
 impl ExecutionAdapter {
@@ -862,9 +875,7 @@ impl ExecutionAdapter {
         );
         let adapter = Arc::clone(self);
         tokio::spawn(async move {
-            adapter
-                .interrupt("执行许可回包丢失，不能确认原操作是否已执行。")
-                .await;
+            adapter.interrupt(cause.interrupt_reason()).await;
         });
     }
 
@@ -1898,4 +1909,14 @@ mod tests {
         assert!(key.contains("lease-admit-failed"), "{key}");
         assert!(!key.contains("/home/someone"), "留痕不得带绝对路径：{key}");
     }
+
+    #[test]
+    fn response_delivery_failure_texts_match_their_cause() {
+        assert!(ResponseDeliveryFailure::Write
+            .interrupt_reason()
+            .contains("回包丢失"));
+        let bind = ResponseDeliveryFailure::TurnBindMismatch.interrupt_reason();
+        assert!(bind.contains("绑定"), "{bind}");
+        assert!(!bind.contains("回包丢失"), "绑定失败不是回包丢失：{bind}");
+    }
 }