Implement expandable volume breakdown with page chips in search panel

Implement synonym and related words highlighting in search results and reader panel

feat: add 'Search' option to selection popup so users can search highlighted text directly in the database

fix: resolve pythainlp and huggingface_hub Permission Denied errors by setting HOME and HF_HOME env variables, and add 'Try searching with AI' button to empty search state

fix: extract and highlight individual matched words from snippets in both AI and FTS modes

fix: reset totalPages to 0 on volume change to prevent stale totalPages capping target page number

fix: highlight matching keywords when jumping from volume breakdown bars

fix: highlight not showing - set highlightQuery after setVolume not before

feat: highlight search keywords on reader page with auto-scroll to first match

feat: FTS5-first + AI button search with split button mode selector

feat: update technology badge in NavDrawer overview tab to Turbovec + Reranker

feat: complete turbovec search backend integration, ignore tvim file in git, and stabilize mobile UI transitions

feat: add Google-style breadcrumb navigation to search results

fix: change search result card div to button to fix touch/click event bubbling on iOS Safari

ux: optimize mobile search result tap responsiveness and drawer closing animation smoothness

ux(ai): move clear history button from header to settings bar to prevent accidental taps on mobile

fix(reader): use theme-aware muted color for footnote text instead of hardcoded text-white/50

design(ai): align disclaimer position below buttons in Answer Card and optimize bottom spacing

fix(ai): resolve disclaimer text overlapping in header by relocating to footer

design(ai): enhance speed dial labels clarity and implement responsive positioning clamping

feat(ai): update AI Chat color scheme to modern Zen Teal & Emerald palette

docs: update arch doc to v2.4.0 and move maximize button to bottom-right

feat(ai): enable full screen focus mode for individual chat history messages

style(ai): increase speed dial label font size and add top safe area padding for Focus Mode

feat(ai): design improvements for chat popup, speeddial menu, resizable answer card, and centered header disclaimer

feat: refine 84000.org attribution and add explicit disclaimer

feat: add 84000.org source attribution to overview tab

fix: reset reader scroll position to top when new page loads

feat: implement vertical scroll navigation and direction-aware page transitions

fix: menu button safe-area inset top for iOS PWA black-translucent

fix: PWA status bar & theming — black-translucent + dark bg match

fix: merge adjacent <B> headings with <I> footnote refs, fix marker normalization exclusion list

feat: normalize reference extraction and popup UI

feat: enhance footnote extraction and display at bottom of page

feat: implement Reference Lookup API and ReferencePopup integration

feat: migrate jina v5, refine AI popup, add reference popup UI

feat: support vertical and diagonal resizing for AI Chat popup and persist panel size

feat: justify body text for better readability

fix: split first-page at homage h4 instead of L0 (works for all volumes)

fix: extract end markers from raw <B> tags instead of sections (works per-page, not proximity guess)

fix: end markers only show for nearby sections (page proximity filter)

fix: remove unused mutedCls to fix TS build error

feat: first-page reader layout (centered homage, split volume title) + clean section range markers

feat: use contents table for reader section hierarchy (L0+L1)

fix: L0->h1, L1->h2 for proper HTML heading hierarchy

fix: make headings much more visually distinct — bg, border, larger sizes

feat: use contents table for full section hierarchy in reader (sections array instead of single title)

fix: detect Thai story-headings like "เรื่องXXX ๑ เรื่อง" as h3 sub-headings

feat: improve reader visual hierarchy — section_title as gold h2, left-align, sub-heading detection

fix: update AI disclaimer text to clearer, more complete version