fix(discord): stop typing after silent runs

src/auto-reply/reply/reply-dispatcher.ts

@@ -69,6 +69,8 @@ type ReplyDispatcherWithTypingResult = {
   dispatcher: ReplyDispatcher;
   replyOptions: Pick<GetReplyOptions, "onReplyStart" | "onTypingController" | "onTypingCleanup">;
   markDispatchIdle: () => void;
+  /** Signal that the model run is complete so the typing controller can stop. */
+  markRunComplete: () => void;
 };
 
 export type ReplyDispatcher = {
@@ -237,5 +239,8 @@ export function createReplyDispatcherWithTyping(
       typingController?.markDispatchIdle();
       resolvedOnIdle?.();
     },
+    markRunComplete: () => {
+      typingController?.markRunComplete();
+    },
   };
 }