daemon: maintain outgoing message reference so model is consistent

kordophoned/src/daemon/events.rs

@@ -2,6 +2,9 @@ use tokio::sync::oneshot;
 use uuid::Uuid;
 
 use kordophone_db::models::{Conversation, Message};
+use kordophone::model::ConversationID;
+use kordophone::model::OutgoingMessage;
+
 use crate::daemon::settings::Settings;
 
 pub type Reply<T> = oneshot::Sender<T>;
@@ -45,6 +48,13 @@ pub enum Event {
     /// - reply: The outgoing message ID (not the server-assigned message ID).
     SendMessage(String, String, Reply<Uuid>),
 
+    /// Notifies the daemon that a message has been sent.
+    /// Parameters: 
+    /// - message: The message that was sent.
+    /// - outgoing_message: The outgoing message that was sent.
+    /// - conversation_id: The ID of the conversation that the message was sent to.
+    MessageSent(Message, OutgoingMessage, ConversationID),
+
     /// Delete all conversations from the database.
     DeleteAllConversations(Reply<()>),
 }