v2.0.0 — Series & folders

• feat: series support — series/*.md files define a series (title, description, cover photo); photo sidecars tagged with series: + seriesOrder: fields
• feat: series folder card in the masonry grid — manila folder aesthetic with peeking photo prints; collapses all photos from a series into one card
• feat: series overlay — full-screen viewer (like lightbox) with thumbnail strip, prev/next, counter; opens from folder card; photo click opens existing lightbox
• fix: Glass ID generation — use text before first period as slug snippet so numbered series like "Gate #12." get unique IDs instead of colliding on "Gate"
• Gate series: 15 photos (#1, #5–#18) tagged as first series
• a11y: series page/overlay — fixed breadcrumb and title contrast, added missing :focus-visible styles across series cards, badges, and overlay controls (incl. keyboard-accessible thumbnail strip)
• fix: all :hover rules now wrapped in @media (hover: hover) (lightbox, stack, desk, photo-page, view-toggle, series)
• refactor: copy-link logic deduplicated into GalleryCore.copyLink(), with execCommand clipboard fallback for non-secure contexts
• perf: will-change hints on lightbox FLIP/zoom and stack-view transitions
• perf: faster local photo processing — single sharp pipeline reused for metadata + thumb + display via .clone()
• perf: watermark resize result cached per target size instead of recomputed for every photo
• chore: OG image generator now reads title/subtitle/attribution/cache dir from config.js instead of hardcoded duplicates
• chore: stale Glass image/hidden-post cache entries pruned automatically each build
• a11y: photo page primary image gets decoding="async" fetchpriority="high"