New Features

• Add Knocket chat support with new knocket.pug template and config option
• Add script and CSS caching mechanism (scriptCache / cssCache) to prevent duplicate loads
• Add rafThrottle utility function based on requestAnimationFrame
• Add HTML escape function (sanitizeString) to prevent XSS injection

Performance

• Replace TOC scroll handling with IntersectionObserver instead of throttle + iteration, significantly reducing scroll event computation
• Switch scroll handler from btf.throttle to btf.rafThrottle, syncing with browser render frame rate
• Add rafThrottle to resize event handler
• Change scrollToDest smooth scrolling from linear interpolation to easeOutQuart easing
• Cache goUpElement / scrollPercentElement in closure for rightsideScrollPercent, avoiding DOM queries on every scroll
• Cache page-header / menus elements in closure for overflowPaddingR
• Cache document.getElementById results in sidebarFn for hamburger menu toggle
• Wrap adjustMenu's classList.toggle in requestAnimationFrame
• Refactor forPostFn to accept $article parameter; all internal functions (addHighlightTool, addPhotoFigcaption, runLightbox, scrollFnToDo, addTableWrap, clickFnOfTagHide, tabsFn) use the passed $article instead of repeated document.getElementById('article-container')
• Convert tabsFn to event delegation, binding click listener on $article instead of each .tabs element
• Convert clickFnOfTagHide to event delegation, binding on $article instead of individual .hide-button elements
• Rewrite getActualHeight to use cloneNode(true) + hidden insertion measurement instead of traversing parent nodes and modifying styles
• Change Traditional/Simplified Chinese lookup from indexOf to Map.has / Map.get for O(1) lookups
• Defer Chinese character mapping initialization (getMaps) to avoid unnecessary computation
• Change translateButtonObject in tw_cn.js to let, supporting re-query after pjax
• Refactor Mermaid gesture system: use AbortController for event listener lifecycle management to prevent duplicate bindings; add stopPropagation to wheel events to prevent scroll pass-through; cache getBoundingClientRect with dirty flag; batch DOM updates via requestAnimationFrame; normalize deltaMode for cross-browser compatibility
• Reduce Mermaid image preview revokeObjectURL timeout from 30s to 5s
• Switch MathJax to ui/lazy module for deferred rendering, removing the renderActions.findScript hack
• Change MathJax re-render to use typesetClear + typesetPromise instead of texReset
• Extract resolvePostAsset as independent function in random_cover.js to reduce duplication
• Change getVersion in page.js to reference themeVersion from module-level require, avoiding repeated package.json reads
• Fix darkmode time range judgment in inject_head_js.js for cross-midnight scenarios (start > end)

Bug Fixes

• Fix Traditional/Simplified Chinese button text not updating after pjax (translateButtonObject changed to let and re-queried in translateInitialization)
• Fix script[data-pjax] replacement failure after pjax completion (add item.parentNode existence check)
• Fix responseURL potentially being undefined in pjax error handling, add null checks
• Fix handleThemeChange crash when themeChange is not an object (add typeof fn !== 'function' check)
• Fix scrollFn where checkDocumentHeight() returning early prevented scroll event binding
• Fix Mermaid chart jumping on scroll in Chrome (svg.style.touchAction = 'none' + preventDefault + stopPropagation on wheel events)
• Fix Mermaid gesture handlers binding repeatedly after themeChange/pjax (replace __mermaidGestureBound flag with __mermaidAbortController cleanup)
• Fix Mermaid configuration parse failure with no error feedback (add try/catch)
• Fix gallery.js IMAGE_REGEX lastIndex not resetting on repeated calls
• Fix XSS vulnerability in flink.js and button.js due to missing HTML escaping
• Fix hide.js parseArgs missing trim, causing parameters to have leading spaces
• Fix series.js module-level mutable groups state accumulating stale data across builds (add before_generate cleanup)
• Fix score.js duplicating escapeHTML implementation, switch to hexo-util's escapeHTML with additional {} handling
• Fix getArchiveLength.js year count not accumulating in monthly mode
• Fix getArchiveLength.js key selection logic so daily mode correctly retrieves month counts
• Fix related_post.js computing postDesc prematurely; defer to render time
• Fix page.js timezone variable scope issue in shuoshuoFN
• Fix page.js cloudTags removing redundant colorClass variable and class
• Fix page.js findArchivesTitle recursion where m[key] might not be a string
• Fix main.js fetchUrl silently returning empty array on HTTP failure; now throws error
• Fix main.js runJustifiedGallery edge case handling when limit / firstLimit are invalid values
• Fix main.js addJustifiedGallery error handling when data is not an array
• Fix main.js sanitizeString from only replacing " to replacing &, ", ', <, > characters
• Fix main.js forPostFn skipping initialization when hbe-container exists
• Fix main.js gallery showing loading animation when data is empty

Changed

• Mermaid gesture zoom from fixed factor (1.1/0.9) to continuous factor (Math.pow(1.001, delta)) for smoother operation
• Mermaid gesture viewBox bounds from computed on each move to pre-calculated minW/maxW/minH/maxH
• Remove unnecessary typeof svg === 'string' branch in Mermaid openSvgInNewTab
• Set MathJax lazyMargin to 200px
• Change adjustMenu hideMenuIndex from inline to pre-declared
• Change scrollFn isChatBtn to typeof window.chatBtn !== 'undefined'
• Change scrollFn innerHeight to dynamically compute window.innerHeight + 56 on each scroll