add: order dms by last message time

crates/core/src/model/channels.rs

@@ -24,21 +24,26 @@ pub struct Channel {
     pub members: Vec<usize>,
     /// The title of the channel.
     pub title: String,
+    /// The timestamp of the last message in the channel.
+    pub last_message: usize,
 }
 
 impl Channel {
     /// Create a new [`Channel`].
     pub fn new(community: usize, owner: usize, position: usize, title: String) -> Self {
+        let created = unix_epoch_timestamp();
+
         Self {
             id: Snowflake::new().to_string().parse::<usize>().unwrap(),
             community,
             owner,
-            created: unix_epoch_timestamp(),
+            created,
             minimum_role_read: (CommunityPermission::DEFAULT | CommunityPermission::MEMBER).bits(),
             minimum_role_write: (CommunityPermission::DEFAULT | CommunityPermission::MEMBER).bits(),
             position,
             members: Vec::new(),
             title,
+            last_message: created,
         }
     }