* File browser: Floating action buttons auto-hide on scroll.
* Back from search results: returns to the folder where search started.
* Search caching: stale-while-revalidate with throttled background refresh.
* Safer search updates with generation token; isolated per connection.
* Modernized Gradle/AGP 8.10 config; removed deprecated Android APIs.
* Uploads: stable connection ID + normalized paths (no duplicate share).
* File browser Back navigates one level up (only exits at root).
* Notifications: tapping opens correct screen/dialog, no unwanted cancels.
* Prevented stale/cancelled search results from overwriting the UI.