v3.0.2 — consolidated design-system recovery

Added

• Recovered the complete revised design-system documentation and visual
  specimens omitted from v3.0.0.
• Added an on-site change log, semantic colour specimens, and automatic inline
  colour chips.
• Synchronized the latest upstream design-system intake, previews, and
  implementation kits.

Changed

• Retained milestone releases v1.0.0, v2.0.0, v2.1.1, and v3.0.0 in the
  release menu, followed by v3.0.2 and future releases.
• Restored the complete header navigation and announcement banner.
• Documentation subsection groups start collapsed, and AI consumption is a
  direct page without a redundant Overview level.

Fixed

• Restored colour scales, palette swatches, semantic swatches, inline colour
  chips, and landing-page footer spacing under the first-party Hugo theme.
• Release menus now derive from the current build, identify v3.0.2 as latest,
  and keep active backgrounds within the dropdown border.
• Repository checks invoke Brand's canonical build and verification workflow.