Factor video code and stores out of voice.ts

src/routes/+layout.svelte

@@ -42,7 +42,6 @@
   import {syncKeyboard} from "@app/util/keyboard"
   import {getPageTitle} from "@app/util/title"
   import NewNotificationSound from "@src/app/components/NewNotificationSound.svelte"
-  import VideoCallLayoutViewportSync from "@app/components/VideoCallLayoutViewportSync.svelte"
 
   const {children} = $props()
 
@@ -230,6 +229,5 @@
     <ModalContainer />
     <div class="tippy-target"></div>
     <NewNotificationSound />
-    <VideoCallLayoutViewportSync />
   </div>
 {/await}