feat: 替换 PhotoSwipe 为 Fancybox 并优化页面标题

- 移除 PhotoSwipe 相关代码和样式
- 添加 @fancyapps/ui 依赖
- 实现 Fancybox 图片查看功能
- 优化归档页和分页的标题显示

package.json

@@ -20,6 +20,7 @@
 		"@astrojs/sitemap": "^3.3.1",
 		"@astrojs/svelte": "7.0.12",
 		"@astrojs/tailwind": "^6.0.2",
+		"@fancyapps/ui": "^6.0.5",
 		"@fontsource-variable/jetbrains-mono": "^5.2.5",
 		"@fontsource/roboto": "^5.2.5",
 		"@iconify-json/fa6-brands": "^1.2.5",