[codex] Fix audited accessibility issues on website and calculator#955

MaxGhenis merged 3 commits into

codex/spm-calculator-launchPolicyEngine/policyengine-app-v2:codex/spm-calculator-launchfrom

codex/a11y-policyengine-followupsPolicyEngine/policyengine-app-v2:codex/a11y-policyengine-followupsCopy head branch name to clipboard