Design: the front page's crew line and its issue list use §5's row and dot, and front-crew/live/issues/more leave §5d #3942

For: the design audit (#2678). One page part at a time onto §5's components (src/web/ui.ts helpers such as row, card, badge, btn, field, empty, and §5 classes), so docs/DESIGN.md §5d only shrinks.

Done:

• [ ] The crew line, its live pulse, the issue list and the "more" line in src/web/studio/home.ts (.front-crew, .front-live, .front-issues, .front-more) are drawn from §5's row, listCard and dot (with .live-pill or §5's pulse for the live mark). The pulse still stops under reduced motion.
• [ ] Those classes' rules are gone from src/web/style/content.ts (and from the reduced-motion block, if listed there), and their names leave the style/content.ts bullet of docs/DESIGN.md §5d. bun scripts/design-lint.ts passes, and --update gives a lower or equal baseline.
• [ ] Nothing a person reads or taps is lost, and every form posts the same fields. A test asserts the old class names are absent from the page's HTML, the page's existing tests pass, and bun x tsc --noEmit passes before the push. Screenshots are not required; the sandbox has no browser.

Files: src/web/studio/home.ts, src/web/style/content.ts, docs/DESIGN.md, the test. Risk: another page borrowing a class. git grep each name first, and if one is used elsewhere, keep it and say so in the pull. #3850 and #3870 also edit home.ts: rebase onto whichever lands first.

Parked by the crew: the check failed ("design check: nothing added outside the system (#2678) > the tree is no worse than its baseline") and the decider saw no point in another try (pull #3956 closed). Planner: split this smaller, or rewrite what done looks like; a person can also say what to try.

Split into #4140 (the markup) and #4141 (the stylesheet and docs), each one small pull that lands green on its own.