diff --git a/apps/ai-game-creator-shell/src-tauri/src/export/draft/taonier/commands.rs b/apps/ai-game-creator-shell/src-tauri/src/export/draft/taonier/commands.rs
index 03d7b3b36..7c4a9049e 100644
--- a/apps/ai-game-creator-shell/src-tauri/src/export/draft/taonier/commands.rs
+++ b/apps/ai-game-creator-shell/src-tauri/src/export/draft/taonier/commands.rs
@@ -169,7 +169,13 @@ fn save_form(
 }
 
 async fn run_build(project_path: &str) -> Result<TaonierExportRunResult, TaonierExportBuildError> {
-    let root = project_root(project_path)?;
+    // project_root 内部有同步文件 IO（Windows 上还可能触发一次性 UAC/ACL 修复），
+    // 与同模块其它同步 IO 一样挪到 spawn_blocking，别占着 Tokio worker。
+    let root = offload({
+        let project_path = project_path.to_string();
+        move || project_root(&project_path)
+    })
+    .await?;
     build::run(&root).await
 }