把回合执行过程渲染的两层三目抽成 renderTurnProcess

- apps/ai-game-creator-shell/src/view/project-development/chat/components/DirectProjectConversation/DirectProjectTurn.tsx 新增 renderTurnProcess，负责空过程、运行中平铺与结束后折叠三种分支
- 组件主体不再嵌套三目，渲染结果与 data-testid="turn-process" 等 DOM 结构保持不变

apps/ai-game-creator-shell/src/view/project-development/chat/components/DirectProjectConversation/DirectProjectTurn.tsx

@@ -32,22 +32,7 @@ export function DirectProjectTurn({ turn }: { turn: DirectChatTurn }) {
       {turn.users.map((block) =>
         renderBlock(turn, block, 'body', streamingKey),
       )}
-      {turn.process.length > 0 ? (
-        turn.active ? (
-          turn.process.map((block) =>
-            renderBlock(turn, block, 'process', streamingKey),
-          )
-        ) : (
-          <details className="message-turn-process" data-testid="turn-process">
-            <summary>执行过程</summary>
-            <div className="message-turn-process-body">
-              {turn.process.map((block) =>
-                renderBlock(turn, block, 'process', streamingKey),
-              )}
-            </div>
-          </details>
-        )
-      ) : null}
+      {renderTurnProcess(turn, streamingKey)}
       {turn.finals.map((block) =>
         renderBlock(turn, block, 'body', streamingKey),
       )}
@@ -56,6 +41,21 @@ export function DirectProjectTurn({ turn }: { turn: DirectChatTurn }) {
   );
 }
 
+/** 运行中的回合把执行过程平铺，已结束的回合折叠进「执行过程」。 */
+function renderTurnProcess(turn: DirectChatTurn, streamingKey: string | null) {
+  if (turn.process.length === 0) return null;
+  const blocks = turn.process.map((block) =>
+    renderBlock(turn, block, 'process', streamingKey),
+  );
+  if (turn.active) return blocks;
+  return (
+    <details className="message-turn-process" data-testid="turn-process">
+      <summary>执行过程</summary>
+      <div className="message-turn-process-body">{blocks}</div>
+    </details>
+  );
+}
+
 function DirectProjectTurnUsage({ turn }: { turn: DirectChatTurn }) {
   if (turn.active || !turn.startedAt) return null;
   const endedAt = Math.max(turn.endedAt, turn.startedAt);