The front page's crew line, live mark, issue list and more line draw §5's row, listCard and dot, and .front-crew, .front-live, .front-issues, .front-more leave the markup #4140

Part one of #3942, which stalled or went red as one change. This part changes only the markup; the stylesheet and docs/DESIGN.md are part two.

Done:

• [ ] The front page's crew line, live mark, issue list and more line are drawn with §5's row, listCard and dot from src/web/ui.ts and §5's classes. None of .front-crew .front-live .front-issues .front-more appears in the page's HTML.
• [ ] Do not delete the rules from src/web/style/content.ts and do not edit docs/DESIGN.md. Part two does that, and the design check stays green because the classes are still defined and named.
• [ ] Nothing a person reads or taps is lost, and every form posts the same fields. A test asserts the old names are absent and the words, links and forms are present.

Files: src/web/studio/home.ts, a test. The live pulse still stops under reduced motion. Other issues edit home.ts, so rebase onto whatever lands first. Before pushing, run bun x tsc --noEmit, bun test test/design-lint.test.ts and the page's tests. No screenshots: the sandbox has no browser.