feat: add /mod summon

crates/chattyness-db/src/ws_messages.rs

@@ -90,6 +90,14 @@ pub enum ClientMessage {
         /// Scene ID to teleport to.
         scene_id: Uuid,
     },
+
+    /// Moderator command (only processed if sender is a moderator).
+    ModCommand {
+        /// Subcommand name ("summon", "avatar", "teleport", "ban", etc.).
+        subcommand: String,
+        /// Arguments for the subcommand.
+        args: Vec<String>,
+    },
 }
 
 /// Server-to-client WebSocket messages.
@@ -234,4 +242,22 @@ pub enum ServerMessage {
         /// Scene slug for URL.
         scene_slug: String,
     },
+
+    /// User has been summoned by a moderator - triggers teleport.
+    Summoned {
+        /// Scene ID to teleport to.
+        scene_id: Uuid,
+        /// Scene slug for URL.
+        scene_slug: String,
+        /// Display name of the moderator who summoned.
+        summoned_by: String,
+    },
+
+    /// Result of a moderator command.
+    ModCommandResult {
+        /// Whether the command succeeded.
+        success: bool,
+        /// Human-readable result message.
+        message: String,
+    },
 }