Accessibility for self-represented litigants: skip link, 404 landmark, print stylesheet

[jacobyoby]

Public court-forms site; these are WCAG-relevant gaps on the pages a self-represented litigant actually uses. All verified in source.

• Skip-to-content link — none on any page. templates/base_templates/base.html:77-151 renders the navbar then #damain with no bypass anchor, so keyboard and screen-reader users tab through the full nav on every question page. WCAG 2.4.1 (Bypass Blocks). ~20 min.
• 404 page dead-ends users — templates/pages/404.html has no role="main" landmark and no link back to a working page, so a mistyped form URL strands the litigant. The question path already sets role="main" (standardformatter.py:947); match it and add a link home. ~15 min.
• No print stylesheet — no @media print rules found. Litigants print the question/summary pages directly to bring to court; today they get the full nav, buttons, and wasted ink. ~1-2 hrs.

Note for the refactor: decorative icons already use alt="" correctly and icon-only controls carry aria-label mirroring the visible text (standardformatter.py:186, 569, 937) — preserve that.

Each ships with a fail-first e2e (curl the page, assert the element is absent on the unpatched release and present on the branch).

[jacobyoby]

Shipped in 476f688: skip link (base.html → #damain, and the Python-emitted interview page → #daquestion), 404 <main role=main> + link home, @media print rules in app.css/app.min.css. Fail-first e2e a11y_check.sh wired into CI as control + pass; verified live, browser regression 7/7.