fix(layout): PageHeader style and breadcrumb.routes prop

[ChuChencheng]

Fixes #8479
Fixes #8490

1. 如果背景默认透明是 by design，那 PageHeader ghost 就默认给个 true 吧
2. 修复 has-breadcrumb, has-footer 样式不生效
3. 修复 breadcrumb.routes 不生效导致面包屑空白
4. 官网白屏可能是依赖的问题，我本地一开始也跑不起来，更新 lock 文件后就正常了

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[socket-security]

New and removed dependencies detected. Learn more about Socket for GitHub ↗︎

Package	New capabilities	Transitives	Size	Publisher
npm/fast-deep-equal@3.1.3	None	0	13 kB	esp
npm/lodash.merge@4.6.2	None	0	54.1 kB	jdalton
npm/typescript@5.4.5	None	0	32.4 MB	typescript-bot

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[socket-security]

🚨 Potential security issues detected. Learn more about Socket for GitHub ↗︎

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Alert	Package	Note
Install scripts	npm/@swc/core@1.4.2	Install script: postinstall Source: node postinstall.js

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