fix: scope Open Library footer to library pages

[dethan3]

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Closes #115

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[TechQuery]

我当时之所以让你合并两个页脚，是因为我觉得新页脚的整体样式和内容都比以前要好。现在的问题只是个别文案和链接与图书馆强绑定，所以要么做通用化处理，要么给这个组件加几个参数从外面传一些定制内容，而不是又退回两个独立的页脚组件……

[dethan3]

后续代码更改在 #117

[TechQuery]

后续代码更改在 #117

是 ChatGPT 没法复用已有的 PR 吗？

[dethan3]

可以复用原有的 PR
ChatGPT 只能从我 Fork 的仓库发起 PR ，但为了便于预览，我选择重新在本地，用原仓库开一个新分支，推送新 PR