feat(frontend): my message menu shows when it was read or listened, group readers open in a right panel

frontend/src/lib/components/MessageMedia.svelte

@@ -14,6 +14,7 @@
   import TgsSticker from "#lib/components/media/TgsSticker.svelte";
   import VideoNote from "#lib/components/media/VideoNote.svelte";
   import VoiceMessage from "#lib/components/media/VoiceMessage.svelte";
+  import MessageReadItem from "#lib/components/read/MessageReadItem.svelte";
   import ContextMenu from "#lib/components/ui/ContextMenu.svelte";
   import ContextMenuItem from "#lib/components/ui/ContextMenuItem.svelte";
   import Icon from "#lib/components/ui/Icon.svelte";
@@ -222,6 +223,9 @@
     </div>
   {/snippet}
   {#snippet menu()}
+    {#if own}
+      <MessageReadItem {message} />
+    {/if}
     <ContextMenuItem icon="open-in-new-tab" onselect={onopen}
       >Открыть на весь экран</ContextMenuItem
     >