feat: sync unfiled drafts across devices (Closes #851)

frontend/index.html

@@ -1222,6 +1222,7 @@
 <script src="static/widgets.js"></script>
 <script src="static/drafts.js"></script>
 <script src="static/unfiled-captures.js"></script>
+<script src="static/unfiled-draft-sync.js"></script>
 <script src="static/shared-image-capture.js"></script>
 <script src="static/draft-filing-session.js"></script>
 <script src="static/draft-capacity-dialog.js"></script>