v1.5.0

Features

• Add 46 interactive SVG visualizations — 100% pattern coverage (Ring Buffer, LRU Cache, Bloom Filter, Min Heap, Skip List, Trie, State Machine, Circuit Breaker, Consistent Hashing, Event Loop, Rate Limiter, Merkle Tree, B+ Tree, Dependency Graph, Observer, Backpressure, Copy-on-Write, and more)
• Upgrade all 46 viz components with useVizTimers composable, scenario presets, and speed controls
• Add i18n composable with full bilingual support for all 46 visualizations
• Replace stacked mermaid charts with interactive components
• Add Pattern Timeline page — 80 years of computing history (EN+ZH)
• Add Cheat Sheet, Use Cases, Interview Guide pages (EN+ZH)
• Add homepage PNG icons for feature cards
• Add sitemap.xml generation and robots.txt for SEO
• Add description frontmatter to all 92 pattern pages and guide pages

Fixes

• Add onUnmounted cleanup to all viz components with timers
• Move viz-status hints to top of visualization area
• Align LSM tree and Interning ASCII diagram box widths
• Add missing abort guards to animation loops
• Fix CJK double-width character alignment in Chinese README
• Add precise line numbers to gRPC-Go middleware-chain source link
• Fix mermaid timeline chart type causing global render errors

Documentation

• Add SOP 09 for Vue component build pitfalls
• Add Related Patterns cross-references to all 92 pattern pages
• Add 4th challenge question to 7 patterns (EN+ZH)
• Complete timeline with 15 missing patterns, enrich by-project pages
• Update README pattern count, exercise counts, and test case counts
• Add missing intro paragraphs and Further Reading to ZH by-project pages
• Sync missing code blocks from EN to 14 ZH pattern pages

Performance

• Lazy-load all 46 visualizer components via defineAsyncComponent
• Increase Node.js heap size for 46-component VitePress build
• Skip SSR for interactive visualizer components