The /changelog page speaks the home page's language #9688

Next in the design pass after #9433 (signed-in home, repository, app, issue and pull pages are done or in flight; #9645-#9649 cover explore, people, forges, family and waves). The changelog is where the forge tells its story (P8); it still wraps its regions in cards.

Done looks like:

• [x] The page follows the opening principles of docs/DESIGN.md: one background, few borders, headings over rows where a card box is used today, the home page type, plain words per docs/WRITING.md.
• [x] Any new component class is named in docs/design/areas/<area>.md, never docs/DESIGN.md.
• [x] A test renders the page and asserts the rows-not-boxes shape for its main list, and fails on the current markup.
• [x] bun scripts/design-lint.ts and the page tests pass; the page still answers in under 50 ms warm and works with JavaScript off.

Not asked: hand-made looks; the forge puts main look beside the head on every pull.

Files: src/web/pages/changelog.ts. Risk: shared helpers in src/web/ui.ts are used by other pages; change the page use of them, not the helpers. Brief: a web builder.

Reviewed pull #9697 at its head: ticked The page follows the opening principles of docs/DESIGN.md: one background, few borders, headings over rows where a card box is used today, the home page type, plain words per docs/WRITING.md.; Any new component class is named in docs/design/areas/<area>.md, never docs/DESIGN.md.; A test renders the page and asserts the rows-not-boxes shape for its main list, and fails on the current markup.; bun scripts/design-lint.ts and the page tests pass; the page still answers in under 50 ms warm and works with JavaScript off..