把澄清问答卡提交按钮文案的嵌套三元改成顺序分支

- apps/ai-game-creator-shell/src/view/project-development/planning/PlanningUserInputCard.tsx 把 answerPrepared / controlBusy||submitting 的嵌套三元改成先取默认值再覆盖的 submitLabel
- 文案取值不变

apps/ai-game-creator-shell/src/view/project-development/planning/PlanningUserInputCard.tsx

@@ -26,6 +26,12 @@ export function PlanningUserInputCard({
     Boolean(answers[question.id]?.trim()),
   );
   const disabled = controlBusy || submitting || answerPrepared;
+  let submitLabel = '提交回答';
+  if (answerPrepared) {
+    submitLabel = '回答已提交';
+  } else if (controlBusy || submitting) {
+    submitLabel = '提交中';
+  }
 
   return (
     <section className="agent-runtime-user-input" aria-label="Needs input">
@@ -93,11 +99,7 @@ export function PlanningUserInputCard({
           ).finally(() => setSubmitting(false));
         }}
       >
-        {answerPrepared
-          ? '回答已提交'
-          : controlBusy || submitting
-            ? '提交中'
-            : '提交回答'}
+        {submitLabel}
       </button>
     </section>
   );