1214 card dark mode

[GCHQ-Developer-741]

Summary of the changes

• Added theme prop to ic-card-vertical, to enable new style tokens for dark mode.
• Added theme prop to tests, storybook and docs

Related issue

#1214

Checklist

General

• [x] Changes to docs package checked and committed.
• [x] All acceptance criteria reviewed and met.

Testing

• [x] Relevant unit tests and visual regression tests added.
• [x] Visual testing against Figma component specification completed.
• [x] Playground stories in React Storybook up to date, with any prop changes and additions addressed.
• [x] Compare performance of modified components against develop using Performance addon in React Storybook.

Accessibility

• [x] Accessibility Insights FastPass performed.
• [x] A11y unit test added and yields no issues.
• [x] A11y plug-in on Storybook yields no issues.
• [x] Manual screen reader testing performed using NVDA and VoiceOver.
• [x] Manual keyboard testing for keyboard controls and logical focus order.
• [x] Correct roles used and ARIA attributes used correctly where required.
• [x] Logical heading structure is maintained, and the HTML elements used for headings can be changed to fit within the wider page structure.

Resize/zoom behaviour

• [x] Page can be zoomed to 400% with no loss of content.
• [x] Screen magnifier used with no issues.
• [x] Text resized to 200% with no loss of content.
• [x] Text spacing increased as per the WCAG 1.4.12 success criterion with no loss of content.

System modes

• [x] Browser setting 'prefers reduced motion' tested. No animations or motion visible whilst this setting is on.
• [x] Windows High Contrast mode tested with no loss of content.
• [x] System light and dark mode tested with no loss of content.
• [x] Browser support tested (Chrome, Safari, Firefox and Edge).

Testing content extremes

• [x] Min/max content examples tested with no loss of content or overflow.
• [x] All prop combinations work without issue.
• [x] Tested for FOUC (Flash of Unstyled Content) in both SSR (Server-Side Rendering) and SSG (Static Site Generation) settings.
• [x] Controlled and uncontrolled input components tested.
• [x] Props/slots can be updated after initial render.

[github-actions[bot]]

View your branch deployment here: https://mi6.github.io/ic-ui-kit/branches/1214-card-dark-mode/web-components View your React branch deployment here: https://mi6.github.io/ic-ui-kit/branches/1214-card-dark-mode/react

[github-actions[bot]]

Cypress visual tests failed. View the image diff here: https://github.com/mi6/ic-ui-kit/tree/gh-pages/branches/1214-card-dark-mode/cypress-image-diff-screenshots/diff View the html report here: https://mi6.github.io/ic-ui-kit/branches/1214-card-dark-mode/cypress-image-diff-html-report/cypress-image-diff-html-report.html