Design: the front page's hero and its terminal line use the design system, and hero/hero-terminal leave §5d #4071

The branch now passes the design lint, and I pushed it. I ran the lint and test/ssh-site.test.ts plus three other test files, 24 tests in all, and they pass. I did not run the whole bun test.

The last attempt had already moved the front page off .hero and .hero-terminal, and their rules were gone from src/web/style/content.ts. The check most likely stayed red because docs/DESIGN.md §5d still listed both names, and the lint reports any listed class that no stylesheet defines. It also still listed .quiet-details, which an earlier change had removed.

• Change: the only edit is in docs/DESIGN.md. I struck .hero, .hero-terminal and .quiet-details from §5d.
• Lint: bun scripts/design-lint.ts now passes. --update left docs/design/baseline.json unchanged, so the baseline is equal rather than lower.
• Page: the signed-out front page already prints FORGE_APP_SSH verbatim in the terminal line, built from the .terminal-line class and card.
• Page test: test/ssh-site.test.ts already asserts that hero-terminal and class="hero are absent from the page's HTML.
• Other pages: nothing else in the repository used the two class names.
• Not done: the before/after screenshots in light and dark, at desktop and 390 px wide, which the issue asks for. I can't take screenshots here, so someone should capture them from this branch's preview.

Closes #3870

The branch now passes the design lint, and I pushed it. I ran the lint and test/ssh-site.test.ts plus three other test files, 24 tests in all, and they pass. I did not run the whole bun test.

The last attempt had already moved the front page off .hero and .hero-terminal, and their rules were gone from src/web/style/content.ts. The check most likely stayed red because docs/DESIGN.md §5d still listed both names, and the lint reports any listed class that no stylesheet defines. It also still listed .quiet-details, which an earlier change had removed.

• Change: the only edit is in docs/DESIGN.md. I struck .hero, .hero-terminal and .quiet-details from §5d.
• Lint: bun scripts/design-lint.ts now passes. --update left docs/design/baseline.json unchanged, so the baseline is equal rather than lower.
• Page: the signed-out front page already prints FORGE_APP_SSH verbatim in the terminal line, built from the .terminal-line class and card.
• Page test: test/ssh-site.test.ts already asserts that hero-terminal and class="hero are absent from the page's HTML.
• Other pages: nothing else in the repository used the two class names.
• Not done: the before/after screenshots in light and dark, at desktop and 390 px wide, which the issue asks for. I can't take screenshots here, so someone should capture them from this branch's preview.

I merged main into the branch and pushed it. The only conflict was in docs/DESIGN.md. I did not get a full bun test result: the run passed the 600-second limit and moved to the background. I ran bun scripts/design-lint.ts and test/ssh-site.test.ts. The lint passes and the six tests pass. The forge's check runs the whole suite on the push.

The conflict was in the "page furniture" bullet of §5d, where main and this branch had both edited the same line. I kept main's version, which has .kv removed. I then struck .hero and .hero-terminal from it again, since they came back with the merge. The branch's only change is those two names leaving the bullet, so .quiet-details was already gone on main.

The before/after screenshots in light and dark, at desktop and 390 px wide, are still missing, as in my first push. I can't take screenshots here.

The front page's hero and terminal line now use the design system's .terminal-line and card. .hero, .hero-terminal and .quiet-details are struck from docs/DESIGN.md §5d, because no stylesheet defines them any more.

I couldn't find the cause of the last red check: the log I received was cut off before the failure. My best guess is that the branch had fallen behind main, which had since added 54 lines to src/core/releases.json. I merged origin/main and pushed, so the forge will rerun the check on the new push.

I ran these before pushing, and all pass:

• the design lint
• test/ssh-site.test.ts, test/studio-changes.test.ts, test/design-lint.test.ts, test/design-map.test.ts
• test/web.test.ts, test/web-ui.test.ts, test/web-code.test.ts, test/home-kpis.test.ts, test/schema-additive.test.ts

test/web-phone.test.ts ran but skipped its phone-width test, because no Chromium starts in this sandbox.

I did not run the whole bun test. bun x tsc --noEmit fails here with "Cannot find type definition file for 'bun'" even after bun install, so the type check did not run either.

The signed-out page still prints FORGE_APP_SSH verbatim. I did not produce the before/after light and dark screenshots.