diff --git a/apps/ai-game-creator-shell/src/view/project-development/planning/PlanningUserInputCard.tsx b/apps/ai-game-creator-shell/src/view/project-development/planning/PlanningUserInputCard.tsx
index dff533d0b..7cdd35eb5 100644
--- a/apps/ai-game-creator-shell/src/view/project-development/planning/PlanningUserInputCard.tsx
+++ b/apps/ai-game-creator-shell/src/view/project-development/planning/PlanningUserInputCard.tsx
@@ -96,7 +96,10 @@ export function PlanningUserInputCard({
           setSubmitting(true);
           void Promise.resolve(
             onSubmit?.(request, responseId, normalizedAnswers),
-          ).finally(() => setSubmitting(false));
+          )
+            // onSubmit 允许返回 rejected promise；这里兜住，避免未处理的 rejection。
+            .catch(() => undefined)
+            .finally(() => setSubmitting(false));
         }}
       >
         {submitLabel}