Add GnActionCard, GnActionList, GnCopyButton, GnRange and GnTagInput ...

- Mirror reference component APIs and register them in the Vue plugin and index.

- Add supporting styles for action-card, list-actions, range, tag-input and .btn-icon.

- Add Vue demo mounts to cards, lists and inputs partials.

- Capture Lists section in screenshot review.

Co-Authored-By: Claude <noreply@anthropic.com>

Final polish, functional audit, and new Vue components ...

- Fix interactive overlay pointer-events for modal/drawer
- Add accordion panel transition so animation completes
- Fix toast inline handler syntax escaping
- Install real Phosphor Icons fonts and CSS
- Add auto-init for browser helpers and GNexusUIKit alias
- Add functional Playwright tests for all interactive components
- Add new Vue components: GnIconButton, GnInputGroup, GnDescriptionList, GnEmptyState, GnPageHeader
- Update kit.scss with new component styles
- All 17 e2e tests, Vue adapter smoke, and production build passing

Co-Authored-By: Claude <noreply@anthropic.com>

Add Divider, Accordion, Stepper and FileAttachment components ...

- Implement CSS for divider, accordion, stepper and file-upload/attachment.
- Add browser Accordion helper and expose it on window.VMKUIKit.
- Add Vue adapters: GnAccordion, GnSteps, GnFileUpload, GnFileAttachment.
- Add demo partials and figma match pages for divider and attached-file.
- Fix Figma comparison flattening for transparent baselines (e.g. breadcrumbs, attached-file).
- Add vertical spacing to the demo index page to separate sections.

All Figma visual tests and the Vue adapter smoke build pass.

Sync tokens and components with Figma variables and frames ...

- Update primitive palette: add neutral-25, adjust warning-bg to #FEF3E5.
- Add full radius scale (xs/sm/md/lg/xl/2xl/full) from radius.tokens.json.
- Update semantic surfaces/borders from Mode 1 tokens.
- Realign buttons: primary dark, secondary mint, accent yellow, tertiary ghost.
- Realign badges, alerts, cards, inputs, checkbox, radio, switch, modal, toast.
- Update demo palette/utilities and style-guide docs.
- Add exported Figma frames and variables under 'figma design parts/' for reference.

Implement Button component and Vue adapter ...

- Add src/scss/components/_buttons.scss with Figma-extracted variants,
  sizes (lg/md/sm/xs/xxs), states (disabled, loading), icon support,
  and destructive secondary/tertiary styles.
- Add src/vue/components/GnButton.js and VmkIcon with inline SVG loading.
- Add shared src/vue/utils.js for class/variant/size normalization and
  legacy Phosphor-name mapping.
- Wire GnButton and VmkIcon into the Vue plugin and entry exports.
- Add demo partial for buttons and update demo index page.