feat: 接入 mnote web tree shell 与主页链路整理

- 增加 mnote-web tree/command 支持与前端 MnoteWebTreeShell 集成
- 调整 sidebar、documents、runtime config 与 dev/prod server 配套逻辑
- 补充 homepage/tree shell smoke 脚本并更新 harness 进度文件

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

@@ -52,7 +52,7 @@ fn sidebar_dataset_query(workspace_id: &str) -> RuntimeQueryEnvelopeWire {
     }
 }
 
-fn load_sidebar_dataset(
+async fn load_sidebar_dataset(
     config: &AppConfig,
     context: &RequestContext,
     workspace_id: &str,
@@ -63,6 +63,7 @@ fn load_sidebar_dataset(
         Some(workspace_id),
         sidebar_dataset_query(workspace_id),
     )
+    .await
 }
 
 fn execute_kernel_query(
@@ -94,7 +95,7 @@ pub async fn project_sidebar(
     let effective_workspace_id =
         resolve_effective_workspace_id(&context, query.workspace_id.as_deref(), true)?
             .expect("workspace_required 已确保存在");
-    let dataset = load_sidebar_dataset(state.config(), &context, &effective_workspace_id)?;
+    let dataset = load_sidebar_dataset(state.config(), &context, &effective_workspace_id).await?;
     let result = execute_kernel_query(
         &context,
         &effective_workspace_id,
@@ -124,7 +125,7 @@ pub async fn subtree(
     let effective_workspace_id =
         resolve_effective_workspace_id(&context, query.workspace_id.as_deref(), true)?
             .expect("workspace_required 已确保存在");
-    let dataset = load_sidebar_dataset(state.config(), &context, &effective_workspace_id)?;
+    let dataset = load_sidebar_dataset(state.config(), &context, &effective_workspace_id).await?;
     let result = execute_kernel_query(
         &context,
         &effective_workspace_id,
@@ -151,7 +152,7 @@ pub async fn edges(
     let effective_workspace_id =
         resolve_effective_workspace_id(&context, query.workspace_id.as_deref(), true)?
             .expect("workspace_required 已确保存在");
-    let dataset = load_sidebar_dataset(state.config(), &context, &effective_workspace_id)?;
+    let dataset = load_sidebar_dataset(state.config(), &context, &effective_workspace_id).await?;
     let result = execute_kernel_query(
         &context,
         &effective_workspace_id,
@@ -176,7 +177,7 @@ pub async fn graph(
     let effective_workspace_id =
         resolve_effective_workspace_id(&context, query.workspace_id.as_deref(), true)?
             .expect("workspace_required 已确保存在");
-    let dataset = load_sidebar_dataset(state.config(), &context, &effective_workspace_id)?;
+    let dataset = load_sidebar_dataset(state.config(), &context, &effective_workspace_id).await?;
     let result = execute_kernel_query(
         &context,
         &effective_workspace_id,
@@ -202,10 +203,6 @@ mod tests {
     use tower::util::ServiceExt;
 
     fn app() -> axum::Router {
-        std::env::set_var(
-            "MNOTE_WEB_QUERY_FIXTURES_JSON",
-            r#"{"sidebar:datasetList":{"documents":[{"id":"page_root","workspace_id":"ws_demo","title":"工作区首页","parent_id":null,"sort_order":0,"is_starred":true,"is_template":false,"created_at":"2026-04-16T00:00:00Z","updated_at":"2026-04-16T00:00:00Z"},{"id":"page_child","workspace_id":"ws_demo","title":"子页面","parent_id":"page_root","sort_order":1,"is_starred":false,"is_template":false,"created_at":"2026-04-16T00:00:00Z","updated_at":"2026-04-16T00:00:00Z"}]},"bridgeLogs:listWorkspaceOverview":{"workspace_id":"ws_demo","command_logs":[{"command_id":"cmd_1","request_id":"req_1","status":"applied","created_at":"2026-04-16T00:00:00Z"}],"domain_events":[{"command_id":"cmd_1","status":"published","created_at":"2026-04-16T00:00:00Z"}],"next_cursor":null,"has_more":false,"filters":{"command_status":null,"event_status":null,"target_page_id":null,"target_block_id":null,"aggregate_type":null,"aggregate_id":null},"generated_at":"2026-04-16T00:00:00Z"}}"#,
-        );
         build_app(AppState::new(AppConfig {
             service_name: "mnote-web".into(),
             service_version: "0.1.0".into(),
@@ -215,6 +212,8 @@ mod tests {
             convex_url: None,
             convex_admin_key: None,
             allow_dev_fixtures: true,
+            query_fixtures_json: Some(r#"{"sidebar:datasetList":{"documents":[{"id":"page_root","workspace_id":"ws_demo","title":"工作区首页","parent_id":null,"sort_order":0,"is_starred":true,"is_template":false,"created_at":"2026-04-16T00:00:00Z","updated_at":"2026-04-16T00:00:00Z"},{"id":"page_child","workspace_id":"ws_demo","title":"子页面","parent_id":"page_root","sort_order":1,"is_starred":false,"is_template":false,"created_at":"2026-04-16T00:00:00Z","updated_at":"2026-04-16T00:00:00Z"}]},"bridgeLogs:listWorkspaceOverview":{"workspace_id":"ws_demo","command_logs":[{"command_id":"cmd_1","request_id":"req_1","status":"applied","created_at":"2026-04-16T00:00:00Z"}],"domain_events":[{"command_id":"cmd_1","status":"published","created_at":"2026-04-16T00:00:00Z"}],"next_cursor":null,"has_more":false,"filters":{"command_status":null,"event_status":null,"target_page_id":null,"target_block_id":null,"aggregate_type":null,"aggregate_id":null},"generated_at":"2026-04-16T00:00:00Z"}}"#.into()),
+            mutation_fixtures_json: None,
             dev_user_id: "dev-user".into(),
             dev_user_name: "开发用户".into(),
             dev_user_email: "dev@mnote.local".into(),