按实际保存快照更新脏状态签名

保存成功后直接记录持久化快照签名，避免闭包中的旧编辑器状态阻止清脏。

apps/ai-game-creator-shell/src/view/ui-editor/useUiEditorPage.ts

@@ -1330,9 +1330,7 @@ export function useUiEditorSession(
           return false;
         }
         setPersistedRevision(result.revision);
-        if (JSON.stringify(editor.state) === snapshotSignature) {
-          setSavedStateSignature(snapshotSignature);
-        }
+        setSavedStateSignature(snapshotSignature);
         return true;
       });
     } catch {
@@ -1401,9 +1399,7 @@ export function useUiEditorSession(
           return null;
         }
         setPersistedRevision(saved.revision);
-        if (JSON.stringify(editor.state) === snapshotSignature) {
-          setSavedStateSignature(snapshotSignature);
-        }
+        setSavedStateSignature(snapshotSignature);
         return await stateStore.generateCode(resourceId);
       });
     } catch (cause) {