📱 1.2.0: Supports Merging Links into a Menu on Mobile

nav: Add mergeOnMobile option to merge navigation and social links on mobile (9e7cdcd)
- Added Backdrop for overlay when panel opens
- Updated NavBar with NavItem and NavSwitch for mobile menu merge
- Added fade effects for panel and overlay in main.css
- Moved ToTopButton out of NavBar for better tab navigation
- Extracted rss link as RssLink
- Adjusted shadow for dark mode
- Added UI.navBarLayout.mergeOnMobile
search: Full-screen search panel with backdrop for viewport < 1128px (f88318b)
- Use display for search panel visibility instead of opacity
- Move SearchSwitch styles to main.css
- Handle panel close on backdrop click in Backdrop
- Handle panel close on ‘Tab’ focus outside the panel in Backdrop

style: Ensure responsive alignment for social sections on / (4b567c0)
rss: Resolve MDX post parsing error (c9ef3f2)
- Fixes an error due to missing compiledContent() method on item in MDX, which cannot be invoked
- Omit generating the content field directly (as it includes unprocessed special syntax, making its generation unnecessary)