fix(editor): catch bad document update

Sometimes we are failing to update the document content for some reason.
Adding some defensive code.

fixes LATITUDE-LLM-APP-8Q

apps/web/src/actions/documents/updateContent.ts

@@ -1,5 +1,6 @@
 'use server'
 
+import { BadRequestError } from '@latitude-data/core/lib/errors'
 import {
   CommitsRepository,
   DocumentVersionsRepository,
@@ -38,6 +39,14 @@ export const updateDocumentContentAction = withProject
       document,
       content: input.content,
     })
+    const updatedDocument = result.unwrap()
 
-    return result.unwrap()
+    // This should never happen but it does happen sometimes
+    if (!updatedDocument) {
+      throw new BadRequestError(
+        'Could not update document, if the issue persists please contact support.',
+      )
+    }
+
+    return updatedDocument
   })

apps/web/src/stores/documentVersions.ts

@@ -207,6 +207,7 @@ export default function useDocumentVersions(
     {
       onSuccess: ({ data: document }) => {
         const prevDocuments = data || []
+
         mutate(
           prevDocuments.map((d) =>
             d.documentUuid === document.documentUuid ? document : d,