feat(core): improve mobile perf (#15317)

#### PR Dependency Tree


* **PR #15317** 👈

This tree was auto-generated by
[Charcoal](https://github.com/danerwilliams/charcoal)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

* **New Features**
* Virtualized mobile navigation with shell navigation and interactive
swipe menus; coordinated mobile back handling with interactive
phases/state restoration.
* Added shared auth request proxy and message-port based token handling
across mobile and worker flows.
* **Bug Fixes**
  * Hydrated remote worker error stacks for calls and observable errors.
* Improved SQLite FTS/indexer and nbstore optional text handling;
refined docs-search ref parsing and notification loading/retry.
* **Refactor / UX**
* Modal focus-preservation and pointer behavior updates; improved mobile
menu controls and back gesture plugins.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/common/nbstore/src/sync/indexer/index.ts

@@ -568,9 +568,7 @@ export class IndexerSyncImpl implements IndexerSync {
         const title = node.fields.title;
         return [
           node.id,
-          {
-            title: typeof title === 'string' ? title : title.at(0),
-          },
+          { title: typeof title === 'string' ? title : undefined },
         ];
       })
     );