chore: 保存当前架构收口与 bug 修复快照

归档本轮 P0/P1 bug 修复、设计审查迁移、AI selection scope 收口与 stream contract 调整，并保留当前 05 主线迁移起点。

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

@@ -1210,6 +1210,18 @@ pub(crate) fn render_editor_island_adapter_script() -> &'static str {
     titleEndpoint: '/api/documents/title',
     editorHostKind: 'leptos_tiptap_island',
   });
+  const syncPageAggregateScript = (session, aggregate) => {
+    if (!session || !aggregate) return;
+    const scriptId = session.pageAggregateScriptId || '__MNOTE_PAGE_AGGREGATE__';
+    const node = document.getElementById(scriptId);
+    if (!node) return;
+    try {
+      node.textContent = JSON.stringify(aggregate);
+      node.setAttribute('data-mnote-page-aggregate-synced-at', String(Date.now()));
+    } catch (error) {
+      console.warn('mnote Page Aggregate script 同步失败', error);
+    }
+  };
 
   const documentSessionRegistry = new Map();
   const localFolderEventRegistry = new Map();
@@ -1622,6 +1634,7 @@ pub(crate) fn render_editor_island_adapter_script() -> &'static str {
       }
       const nextRevision = Number.isInteger(nextBody.revision) ? nextBody.revision : revisionFromConflictKey(nextConflictKey);
       session.latestAggregate = nextAggregate;
+      syncPageAggregateScript(session, nextAggregate);
       session.title = nextAggregate?.head?.title || session.title;
       session.currentTiptapDocument = nextTiptapDocument;
       session.currentSerialized = nextSerialized;
@@ -1891,6 +1904,7 @@ pub(crate) fn render_editor_island_adapter_script() -> &'static str {
       sourceKind,
       rootUri: runtimeDescriptor.bootstrap.rootUri,
       saveEndpoint: runtimeDescriptor.bootstrap.saveEndpoint || '/api/documents/save',
+      pageAggregateScriptId: runtimeDescriptor.bootstrap.pageAggregateScriptId || '__MNOTE_PAGE_AGGREGATE__',
       latestAggregate: runtimeDescriptor.aggregate,
       title: runtimeDescriptor.aggregate.head?.title || '无标题',
       currentTiptapDocument: tiptapDocument,
@@ -3082,6 +3096,7 @@ mod tests {
         assert!(html.contains("mnote.tree_live_bootstrap.v1"));
         assert!(html.contains("/api/tree/events"));
         assert!(html.contains("data-mnote-tree-live-transport"));
+        assert!(html.contains("syncPageAggregateScript(session, nextAggregate);"));
         assert!(!html.contains("mnote-web-document-shell"));
     }