feat(v0.8.281): emit open-notification-opened for desktop dismiss

After openNotificationTarget, notify UI so desktop can clear channel
unread desktop notification batch.

Co-authored-by: Cursor <[email protected]>

index.js

@@ -758,6 +758,12 @@ async function dispatchUiMessage (platform, msg, hooks = {}) {
       messageId: msg.messageId
     })
     pushState()
+    send({
+      type: 'open-notification-opened',
+      guildId: msg.guildId || platform.guild?.guild?.id || null,
+      channelId: msg.channelId || result.channelId || null,
+      messageId: msg.messageId || null
+    })
     send({ type: 'open-notification-result', ...result })
     return true
   }