1：修改ios26tabbar的问题

2：修改键盘AI点击必须要登录装填

keyBoard/Class/AiTalk/V/Chat/KBPersonaChatCell.m

@@ -213,7 +213,7 @@ static NSString * const KBChatSessionDidResetNotification = @"KBChatSessionDidRe
     
     // 设置 UI
     [self.backgroundImageView sd_setImageWithURL:[NSURL URLWithString:persona.coverImageUrl]
-                                placeholderImage:[UIImage imageNamed:@"placeholder_bg"]];
+                                placeholderImage:[UIImage imageNamed:@"ai_placehode_icon"]];
     [self.avatarImageView sd_setImageWithURL:[NSURL URLWithString:persona.avatarUrl]
                             placeholderImage:[UIImage imageNamed:@"placeholder_avatar"]];
     self.nameLabel.text = persona.name;