mod: 添加特关投稿私信错误处理

lib/pages/whisper_detail/widget/chat_item.dart

@@ -199,6 +199,7 @@ class ChatItem extends StatelessWidget {
             children: [
               GestureDetector(
                 onTap: () async {
+                  try {
                     SmartDialog.showLoading();
                     var bvid = content["bvid"];
                     final int cid = await SearchHttp.ab2c(bvid: bvid);
@@ -210,6 +211,10 @@ class ChatItem extends StatelessWidget {
                             'heroTag': heroTag,
                           }),
                     );
+                  } catch (err) {
+                    SmartDialog.dismiss();
+                    SmartDialog.showToast(err.toString());
+                  }
                 },
                 child: NetworkImgLayer(
                   width: 220,