Release 4.39.0

What the front-page passes of 10-29 (Media, Quest, Actor, Rent, Services, Community) each had to add locally:

• kit.rail({ wrap: true }): phones still swipe; from 760 px every item shows in a grid, with no arrows and no kit-web.js. Media and Quest drew this with their own rules.
• kit.card({ sub, preview, whoHtml }): one plain muted line under the title (Rent showed the city as a badge and the kind only on hover); a text thing's first nine lines in the media instead of an icon (Community's code pastes); the name as escaped markup with its decorations. kit.row({ rel }) for links people posted.
• No tile alone on a row in showcase.apps: two to four tiles (or eight, twelve…) get a column count that fills their rows. Four are four across on a phone, two by two from 600 px and four from 960 px (Actor had local rules).
• 44 px to the touch: the rail's See all (32 px), tab pills (36 px), a list's heading link and the launcher's See all, on touch screens and below 760 px.
• A number that is a link is not underlined: the whole stats tile is the target, with a hover border and a focus ring.
• The Markdown twin reads kit markup as a person sees it: a card's who, count and time keep their spaces ("Maticus12 viewsTue" was what agents read), buttons, icons, players and the ⋯ menu are left out, and a stats strip is - label: value lines.
• scripts/kit-gallery.js --rooms: a gallery page of front-page pieces (cards, both rails, stats links, launchers).