[web] avoid accessing the sharejs snapshot directly (#25037)

* [web] avoid accessing the sharejs snapshot directly

* [web] limit API interface for sharejs types

GitOrigin-RevId: faece372128e4580376e32fa93aa8fedf1e02957

services/web/frontend/js/features/ide-react/context/editor-manager-context.tsx

@@ -580,7 +580,7 @@ export const EditorManagerProvider: FC = ({ children }) => {
         editorContent =
           typeof editorContent === 'string'
             ? editorContent
-            : document.doc?._doc.snapshot
+            : document.getSnapshot()
 
         // Tear down the ShareJsDoc.
         if (document.doc) document.doc.clearInflightAndPendingOps()

services/web/frontend/js/features/ide-react/context/references-context.tsx

@@ -60,7 +60,7 @@ export const ReferencesProvider: FC = ({ children }) => {
       // avoid reindexing references if the bib file has not changed since the
       // last time they were indexed
       const docId = doc.doc_id
-      const snapshot = doc._doc.snapshot
+      const snapshot = doc.getSnapshot()
       const now = Date.now()
       const sha1 = generateSHA1Hash(
         'blob ' + snapshot.length + '\x00' + snapshot