📋 Changelog

All notable changes to this blog will be documented here.

---

[1.5.0] - 2026-02-13

🚀 Performance

• perf: Font CSS non-blocking load (media=print→all trick)
• perf: KaTeX CSS non-blocking load (moved from render-blocking link to async JS)
• perf: Add defer to all afterDOMReady external scripts (copy-tex.min.js, postscript.js)
• perf: Giscus comments lazy-load with IntersectionObserver (only loads when near viewport)
• perf: TOC scroll: cache link elements in Map, skip redundant highlight updates
• perf: Explorer: cache FileTrieNode across SPA navigations
• perf: Resize pusheencode.gif 400×300→175×131 (35K→13K)
• perf: Resize shizi321.png 200×200→64×64 retina (28K→5K)
• perf: Add giscus.app preconnect (saves ~370ms connection time)
• perf: PageTitle icon loading="lazy"

🎨 UI/UX

• style: Extract CSS variables (border-radius, transition-speed, shadow, icon-opacity, code-font-size)
• style: Dark mode: image shadow + external link icon opacity adaptation
• style: Smoother line-height transition (desktop 1.8 → mobile 1.75)
• style: BackToTop safe-area-inset-bottom for notch devices
• style: Explorer folder icon color from hardcoded #e8a838 to CSS variable
• style: Use Sass $mobile/$tablet variables instead of hardcoded breakpoints
• style: Homepage Pusheen GIF enlarged (150→300px, responsive)
• style: Nav icons: Home 🏠→🏡, About 👤→🐱
• style: iOS tap highlight removed (-webkit-tap-highlight-color: transparent)

🐛 Fixes

• fix: Remove crossorigin from giscus preconnect (script, not CORS)
• fix: TOC aria-expanded string value instead of boolean
• fix: Merge duplicate blockquote/link CSS rules
• fix: GIF explicit width+height to prevent CLS

♿ Accessibility

• a11y: Body element changed from <div> to <main> landmark
• a11y: Unify code font-size across codebase via CSS variable

📡 SEO

• seo: Add description frontmatter to all index pages
• seo: CDN font fallback for China accessibility (jsdelivr → zzko → elemecdn)

---

[1.4.0] - 2026-02-13

🚀 Performance

• perf: Compress icon.png (598K→23K) and shizi321.png (598K→27K)
• perf: Add dns-prefetch for cdn.jsdelivr.net
• perf: Mobile code blocks touch-action optimization

🎨 UI/UX

• style: Switch code highlight theme to one-dark-pro / one-light
• style: External links open in new tab with ↗ indicator (hidden on mobile)
• style: TOC active heading highlight with colored border
• style: Dark mode table border contrast improvement
• style: Add tablet breakpoint (600-800px) responsive styles
• style: Mobile breadcrumb overflow horizontal scroll
• style: Search shortcut hint adapts to platform (⌘K on Mac, Ctrl K on others)
• feat: Enhanced 404 page with navigation links (Home, Tags, Timeline)
• feat: Update OG social share image to shizi avatar

🐛 Fixes

• fix: OG meta tag name → property for og:site_name
• fix: Code line number color follows theme variable
• fix: Tag page limit raised from 10 to 50
• fix: TOC only highlights current section instead of all read sections

📡 SEO

• seo: Add canonical URL meta tag
• seo: Add robots meta tag (index, follow)
• seo: Add theme-color meta for mobile browsers

🧹 Cleanup

• chore: Remove unused .recent-notes CSS
• chore: Remove unnecessary !important declarations
• a11y: Improve logo alt text to “Shizi’s Blog”
• fix: Replace placeholder email in about.md
• fix: Disable built-in external link SVG icon (keep ↗ text only)
• fix: Remove duplicate position: relative in base.scss
• fix: File icon color adapts to dark mode (currentColor + opacity)
• fix: Homepage GIF alt text improved
• perf: Add dns-prefetch for giscus.app
• style: theme-color meta adapts to light/dark mode
• style: Changelog footer text switched to English

---

[1.3.0] - 2026-02-13

🚀 Performance

• perf: Add image lazy loading for all content images
• perf: Consolidate fonts to single CDN (jsDelivr), fix fontOrigin config
• chore: Move homepage GIF to local static (remove external dependency)
• chore: Remove unused Plausible analytics config

🎨 UI/UX

• feat: Add back-to-top button (fixed, bottom-right)
• style: Add mobile responsive styles (typography, code blocks, tables, images, spacing)
• style: Adjust code font size closer to body text

---

[1.2.0] - 2026-02-12

✨ Features

• feat: Add Timeline page showing all notes sorted by date
• feat: Explorer folder icon click toggles expand/collapse, title click navigates
• docs: Add WRITING-GUIDE.md for AI/human content creation

🐛 Fixes

• fix: Disable parseTags to prevent #include/#define being treated as tags
• fix: Replace Explorer fold arrows with yellow folder SVG icons
• style: Remove RecentNotes from sidebar (replaced by Timeline)

---

[1.1.0] - 2026-02-12

🎨 UI/UX

• feat: Add shizi icon to page title and favicon
• feat: Add Tags page and navigation link
• feat: Add Changelog page replacing timeline
• feat: Add RSS subscription link to About page
• style: Switch UI language to English
• fix: Fix transparent background for shizi icon
• fix: Fix broken wikilink in 图解系统 index (underscore italic conflict)

---

[1.0.0] - 2026-02-12

🎉 Initial Release

• feat: Blog launched, built with Quartz v4.5.2
• feat: Deployed to Cloudflare Pages with custom domain shiziblog.cn
• feat: Giscus comment system integrated

📚 Content

• add: 图解网络 — TCP, HTTP, IP network protocols
• add: 图解系统 — Process, memory, filesystem
• add: 图解MySQL — Index, transaction, locks
• add: 图解Redis — Data structures, persistence, clustering
• add: 面试题 — Interview questions collection

🎨 UI/UX

• style: OneDark dark theme + One Light light theme
• style: LXGW WenKai font for Chinese text
• style: JetBrains Mono for code blocks
• feat: Top navigation bar (Home, Index, Tags, Changelog, About)
• fix: Remove Explorer sidebar, move search to right
• fix: Remove Quartz footer branding

---

💡 Format reference: Keep a Changelog & Conventional Commits