daemon: adds conversation list limit, fixes auth saving in db auth store

kordophoned/src/daemon/events.rs

@@ -21,7 +21,10 @@ pub enum Event {
     SyncConversation(String, Reply<()>),
 
     /// Returns all known conversations from the database.
-    GetAllConversations(Reply<Vec<Conversation>>),
+    /// Parameters: 
+    /// - limit: The maximum number of conversations to return. (-1 for no limit)
+    /// - offset: The offset into the conversation list to start returning conversations from.
+    GetAllConversations(i32, i32, Reply<Vec<Conversation>>),
 
     /// Returns all known settings from the database.
     GetAllSettings(Reply<Settings>),