fix(frontend): paint video poster frames, clip round videos to circle

frontend/src/lib/components/stories/AllStoriesArchive.svelte

@@ -9,6 +9,7 @@
   import Icon from "$lib/components/ui/Icon.svelte";
   import Spinner from "$lib/components/ui/Spinner.svelte";
   import { peerName } from "$lib/format/peer";
+  import { poster } from "$lib/media/poster";
   import { accounts } from "$lib/stores/accounts.svelte";
 
   interface Group {
@@ -167,7 +168,9 @@
                 <video
                   src={previews[item.story_id]}
                   muted
+                  playsinline
                   preload="metadata"
+                  use:poster
                 ></video>
                 <span class="play"><Icon name="play" size="1.5rem" /></span>
               {:else}