Webui cleanups (#8991)

* Fix mobile event timeago

* Reduce preview playback rate for safari browser

* Fix dashboard buttons

* Update recent events correctly

* Fix opening page on icon toggle

* Fix video player remote playback check

* fix history image

* Add sticky headers to history page

* Fix iOS empty frame

* reduce duplicate items and improve time format

* Organize data more effictively and ensure data is not overwritten

* Use icon to indicate preview

web/src/types/history.ts

@@ -10,6 +10,7 @@ type Card = {
     camera: string,
     time: number,
     entries: Timeline[],
+    uniqueKeys: string[],
 }
 
 type Preview = {