feat: Show diff when navigating revision history (#4069)

* tidy

* Add title to HTML export

* fix: Add compatability for documents without collab state

* Add HTML download option to UI

* docs

* fix nodes that required document to render

* Refactor to allow for styling of HTML export

* div>article for easier programatic content extraction

* Allow DocumentHelper to be used with Revisions

* Add revisions.diff endpoint, first version

* Allow arbitrary revisions to be compared

* test

* HTML driven revision viewer

* fix: Dark mode styles for document diffs

* Add revision restore button to header

* test

* Support RTL languages in revision history viewer

* fix: RTL support
Remove unneccessary API requests

* Prefetch revision data

* Animate history sidebar

* fix: Cannot toggle history from timestamp
fix: Animation on each revision click

* Clarify currently editing history item

server/routes/api/documents.ts

@@ -35,6 +35,7 @@ import {
   presentDocument,
   presentPolicies,
 } from "@server/presenters";
+import slugify from "@server/utils/slugify";
 import {
   assertUuid,
   assertSort,
@@ -471,7 +472,7 @@ router.post(
       ctx.set("Content-Type", contentType);
       ctx.set(
         "Content-Disposition",
-        `attachment; filename="${document.title}.${mime.extension(
+        `attachment; filename="${slugify(document.title)}.${mime.extension(
           contentType
         )}"`
       );