Rework avatars.

Now we have a concept of an avatar at the server, realm, and scene level
and we have the groundwork for a realm store. New uesrs no longer props,
they get a default avatar. New system supports gender
{male,female,neutral} and {child,adult}.

crates/chattyness-db/src/ws_messages.rs

@@ -5,7 +5,7 @@
 use serde::{Deserialize, Serialize};
 use uuid::Uuid;
 
-use crate::models::{AvatarRenderData, ChannelMemberInfo, ChannelMemberWithAvatar, LooseProp};
+use crate::models::{AvatarRenderData, ChannelMemberInfo, ChannelMemberWithAvatar, ForcedAvatarReason, LooseProp};
 
 /// Default function for serde that returns true (for is_same_scene field).
 /// Must be pub for serde derive macro to access via full path.
@@ -274,4 +274,26 @@ pub enum ServerMessage {
         /// Whether the member is still a guest.
         is_guest: bool,
     },
+
+    /// A user's avatar was forcibly changed (by moderator or scene entry).
+    AvatarForced {
+        /// User ID whose avatar was forced.
+        user_id: Uuid,
+        /// The forced avatar render data.
+        avatar: AvatarRenderData,
+        /// Why the avatar was forced.
+        reason: ForcedAvatarReason,
+        /// Display name of who forced the avatar (if mod command).
+        forced_by: Option<String>,
+    },
+
+    /// A user's forced avatar was cleared (returned to their chosen avatar).
+    AvatarCleared {
+        /// User ID whose forced avatar was cleared.
+        user_id: Uuid,
+        /// The user's original avatar render data (restored).
+        avatar: AvatarRenderData,
+        /// Display name of who cleared the forced avatar (if mod command).
+        cleared_by: Option<String>,
+    },
 }