MM-55251 - Updating reply count on thread post (#26142)

* MM-55251 - Updating reply count on thread post

* Updating reply count fetch

* Fixing lint errors

---------

Co-authored-by: Mattermost Build <build@mattermost.com>

webapp/channels/src/selectors/rhs.ts

@@ -94,6 +94,7 @@ export const getSelectedPost = createSelector(
             message: localizeMessage('rhs_thread.rootPostDeletedMessage.body', 'Part of this thread has been deleted due to a data retention policy. You can no longer reply to this thread.'),
             channel_id: selectedPostChannelId,
             user_id: currentUserId,
+            reply_count: 0,
         };
     },
 );