v1.5.0

• Remove link-card runtime proxy for static builds
• Gate enhancement scripts (image viewer, copy-code, etc.) by content features
• Gate KaTeX stylesheet loading to pages that use math
• Scope fetchpriority="high" to the first content image only
• Reduce scroll work for active TOC link tracking
• Drop runtime SVG recoloring for favicon, use static PNG pair instead
• Deduplicate NeoDB card requests
• Render NeoDB cards with safe DOM APIs
• Share lazy resource loading logic across cards
• Delegate clicks and add destroy controller in image-viewer
• Sanitize embedded directives in markdown rendering
• Remove deprecated execCommand fallback in CopyCode, now using Clipboard API only
• Use local fonts for OG image generation
• Simplify theme manager listeners
• Simplify copy-code state handling
• Use explicit image state classes in link-card