希望阅读模式下能够支持外部应用打开图片

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Is your feature request related to a problem? Please describe. A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]

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Additional context Add any other context or screenshots about the feature request here. 编辑模式下已经支持外部应用打开图片了，希望阅读模式下也能够支持，否则图片缩放太大时难以操作