Fix local filetree page tree open performance

rust/crates/mnote-web/src/routes/web_shell.rs

@@ -1350,7 +1350,9 @@ pub(crate) async fn build_page_aggregate_snapshot(
             resolve_local_markdown_page_aggregate(&root_uri_for_build, &document_id)
         })
         .await
-        .map_err(|error| WebError::internal(format!("本地 Page Aggregate 构建任务失败: {error}")))??;
+        .map_err(|error| {
+            WebError::internal(format!("本地 Page Aggregate 构建任务失败: {error}"))
+        })??;
         super::ui_preferences::apply_effective_page_preferences(
             state,
             context,
@@ -1661,12 +1663,22 @@ pub(crate) fn render_local_sidebar_tree_html(
     active_document_id: Option<&str>,
 ) -> Result<String, WebError> {
     let snapshot = load_local_folder_page_tree_snapshot(root_uri)?;
+    Ok(render_local_sidebar_tree_html_from_snapshot(
+        &snapshot,
+        active_document_id,
+    ))
+}
+
+pub(crate) fn render_local_sidebar_tree_html_from_snapshot(
+    snapshot: &crate::routes::snapshot_support::ProjectionSnapshot,
+    active_document_id: Option<&str>,
+) -> String {
     let rows = collect_page_tree_render_rows(&snapshot.projection);
-    Ok(render_initial_page_tree_html(&PageTreeInitialRenderInput {
+    render_initial_page_tree_html(&PageTreeInitialRenderInput {
         rows,
         active_node_id: active_document_id.map(ToOwned::to_owned),
         focused_node_id: None,
-    }))
+    })
 }
 
 pub(crate) fn render_local_file_tree_html(
@@ -2436,8 +2448,7 @@ mod tests {
         let aggregate_uri = format!(
             "/api/page-aggregate/local-md:Cold~20Start~2FCold~20Start.md?sourceKind=local_folder&rootUri={root_uri}"
         );
-        super::LOCAL_PAGE_AGGREGATE_TEST_BLOCK_MS
-            .store(400, std::sync::atomic::Ordering::SeqCst);
+        super::LOCAL_PAGE_AGGREGATE_TEST_BLOCK_MS.store(400, std::sync::atomic::Ordering::SeqCst);
         struct ResetLocalAggregateBlock;
         impl Drop for ResetLocalAggregateBlock {
             fn drop(&mut self) {