1. fix: Fix favicon fetch failure due to redirection.
2. feat: Optimize issue where the add button is not displayed after refresh.
3. feat: Add cancel refresh all feeds.

1. fix: 修复因重定向导致获取 favicon 失败的问题。
2. feat: 优化刷新后添加按钮不显示的问题。
3. feat: 新增取消刷新所有源功能。