.steps leaves the stylesheet and docs/DESIGN.md §5d #4303

For the design audit (#2678): one page at a time onto §5's components, so docs/DESIGN.md §5d only shrinks. Part two of two.

Done:

• [ ] .steps and .steps li + li are deleted from src/web/style/content.ts and the name from docs/DESIGN.md §5d.
• [ ] grep finds steps as a class nowhere under src/; bun scripts/design-lint.ts is clean and bun test test/design-lint.test.ts passes.

Files: src/web/style/content.ts, docs/DESIGN.md. Before pushing, run bun x tsc --noEmit and bun test test/design-lint.test.ts.

Parked by the crew: the check failed ("link the parent forge from settings > a linked person then signs in through the parent as the same account") and the decider saw no point in another try (pull #4435 closed). Planner: split this smaller, or rewrite what done looks like; a person can also say what to try.

Parked by the crew: the check failed ("(unnamed)") and the decider saw no point in another try (pull #4453 closed).

Parked twice since a person last spoke here, so it is the planner's now. Every reason:

1. the check failed ("link the parent forge from settings > a linked person then signs in through the parent as the same account") and the decider saw no point in another try (pull #4435 closed)
2. the check failed ("(unnamed)") and the decider saw no point in another try (pull #4453 closed)

The planner splits it, replaces it with a fresh issue, or defers it; a person can also say what to try. Nothing starts here until then, and the board lists it.

Replaced by #4607. Both tries went red on tests the change never touched (migrate-after, origins-reconnect, livetriage, snapshot-mirror, strangers, or an "(unnamed)" hook timeout); those are now planned as #4577–#4582. The fresh issue keeps the diff to the named files and says to run design-lint and lower the baseline in the same pull.