抽出策划输入区与提交按钮共用的禁用判据

- apps/ai-game-creator-shell/src/view/project-development/planning/PlanningChatView.tsx 新增 composerDisabled，替换 ResourceReferenceInput 与提交按钮上逐字重复的四条件表达式
- 判据取值不变，后续改条件时不会只改到其中一处

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

@@ -200,6 +200,12 @@ export function PlanningChatView({
     submitLabel = '思考中';
   }
   const submitting = controlBusy && !needsUserInput;
+  // 输入区与提交按钮共用同一个禁用判据，避免两处条件各改一半而漂移。
+  const composerDisabled =
+    controlBusy ||
+    needsUserInput ||
+    Boolean(designView?.session.pendingApproval) ||
+    Boolean(designView?.session.pendingClarification);
 
   const renderMessage = (message: ChatMessage, index: number) => (
     <div
@@ -390,12 +396,7 @@ export function PlanningChatView({
             versions={versions}
             assets={chatProjectAssets}
             projectPath={projectPath}
-            disabled={
-              controlBusy ||
-              needsUserInput ||
-              Boolean(designView?.session.pendingApproval) ||
-              Boolean(designView?.session.pendingClarification)
-            }
+            disabled={composerDisabled}
             rows={3}
             value={chatInput}
             references={chatReferences}
@@ -411,12 +412,7 @@ export function PlanningChatView({
                 className="project-chat-submit-button"
                 aria-label={submitLabel}
                 title={submitLabel}
-                disabled={
-                  controlBusy ||
-                  needsUserInput ||
-                  Boolean(designView?.session.pendingApproval) ||
-                  Boolean(designView?.session.pendingClarification)
-                }
+                disabled={composerDisabled}
               >
                 {submitting ? (
                   <Loader2