ダブル・モード，ちょっと修正

main.py

@@ -203,13 +203,14 @@ class Main:
 
                         screen.fill ((0, 255, 0))
 
-                        chat_item.author['name'] = 'ゴートうひとり' if goatoh_talking else '伊地知ニジカ'
-                        chat_item.author['id'] = ''
-                        chat_item.author['channelId'] = './favicon-goatoh.ico' if goatoh_talking else './favicon.ico'
+                        chat_item.author = {'name':     'ゴートうひとり' if goatoh_talking else '伊地知ニジカ',
+                                            'id':       '',
+                                            'imageUrl': './favicon-goatoh.ico' if goatoh_talking else './favicon.ico'}
+                        chat_item.message = histories.pop (-1)['content']
+
+                        message = chat_item.message
 
                         goatoh_talking = not goatoh_talking
-
-                        message = histories.pop (-1)['content']
             else:
                 # Chat オブジェクトが無効