Add indicator for who sent the most recent message in a converssation

src/app/components/Chat.svelte

@@ -170,7 +170,7 @@
         id,
         type: "note",
         value: event,
-        showPubkey: created_at - previousCreatedAt > int(15, MINUTE) || previousPubkey !== pubkey,
+        showPubkey: created_at - previousCreatedAt > int(2, MINUTE) || previousPubkey !== pubkey,
       })
 
       previousDate = date

src/app/components/ChatItem.svelte

@@ -59,6 +59,11 @@
         {/if}
       </div>
       <p class="overflow-hidden text-ellipsis whitespace-nowrap text-sm">
+        <span class="opacity-50">
+          {#if props.messages[0].pubkey === $pubkey}
+            You:
+          {/if}
+        </span>
         {props.messages[0].content}
       </p>
     </div>