chore: land tree view-state, vault, Pi module split, and repo hygiene

Persist PageTree expand state via control-plane view-state and align
chevron/DOM with restored expansion; keep Sidex-style shallow page-tree
scan and drop the unused recursive scanner that only added cargo noise.

Add password vault workbench routes/runtime/skill/CLI, split page_ai_pi
into a module package, and retire Hermes/ACP/OpenHub recycle + root
harness evidence from the index while gitignoring recycle and local
diag dumps.

Archive superseded design/bugs docs under old/, point architecture at
ARCHITECTURE.md, and refresh smokes for Pi S1–S7, vault, and editor
regressions so the working tree can stay clean.

rust/crates/mnote-web/src/ssr/pages/home.rs

@@ -21,6 +21,9 @@ pub fn HomePage(
     /// workspace shell 侧栏 sections HTML（可选）
     #[prop(optional)]
     workspace_sidebar_html: Option<String>,
+    /// 顶栏页面祖先链 HTML（可选）
+    #[prop(optional)]
+    breadcrumb_html: Option<String>,
     /// 当前选中的页面 id（可选）
     #[prop(optional)]
     active_page_id: Option<String>,
@@ -36,6 +39,9 @@ pub fn HomePage(
     /// 是否启用树实时流
     #[prop(optional, default = true)]
     enable_tree_live: bool,
+    /// 密码箱导航 SSR href（含 local_folder 上下文）
+    #[prop(optional)]
+    vault_nav_href: Option<String>,
 ) -> impl IntoView {
     let active_page_id = active_page_id.unwrap_or_default();
     let active_page_title = active_page_title
@@ -54,7 +60,7 @@ pub fn HomePage(
         .map(|workspace_id| format!("/documents/{active_page_id}?workspaceId={workspace_id}"))
         .unwrap_or_else(|| format!("/documents/{active_page_id}"));
     view! {
-        <PageLayout current_nav="home" sidebar_tree_html={sidebar_tree_html.unwrap_or_default()} workspace_name={workspace_name.unwrap_or_default()} workspace_sidebar_html={workspace_sidebar_html.unwrap_or_default()} topbar_title={active_page_title.clone()} show_admin_access_policy={show_admin_access_policy} enable_tree_live={enable_tree_live}>
+        <PageLayout current_nav="home" sidebar_tree_html={sidebar_tree_html.unwrap_or_default()} workspace_name={workspace_name.unwrap_or_default()} workspace_sidebar_html={workspace_sidebar_html.unwrap_or_default()} topbar_title={active_page_title.clone()} breadcrumb_html={breadcrumb_html.unwrap_or_default()} show_admin_access_policy={show_admin_access_policy} enable_tree_live={enable_tree_live} vault_nav_href={vault_nav_href.unwrap_or_default()}>
             {move || if has_active_page {
                 view! {
                     <main class="document-shell document-shell--workspace-entry" data-root-active-page-id={active_page_id.clone()} data-editor-host="leptos_tiptap_island">