[JakeGinnivan]

This is the fork side of dddwa/ddd-core#31 (closes dddwa/ddd-core#13). I've applied that PR's core/ changes here directly, so the next /core-pull brings the same content and doesn't conflict.

Summary

Perth's wordmark and hero Ds move out of core/ and into the fork, unchanged, and the build manifest points at them.

 conference/
+├── brand/
+│   ├── logo.svg                 # DDD PERTH wordmark (was core/website/app/images/svg/)
+│   └── d-{green,pink,purple}.svg  # hero marks (was core/website/app/images/hero/)
 └── build-manifest.ts
+      brandAssets: { logo, heroMarks: [d-green, d-pink, d-purple] }
 core/website/
-├── app/images/svg/logo.svg
-├── app/images/hero/d-*.svg
+└── vite-plugins/conference-brand.ts   # → virtual:conference-brand

How the change works is in ddd-core#31. Writing this fork side turned up one extra fix, now on that PR as well: the plugin adds the brand directory to Vite's fs.allow. In the fork the files sit outside core/, so vitest refused to load them (Denied ID .../conference/brand/logo.svg?react) and the two portal test files failed. The standalone core build never hits this.

Every changed core/ file matches ddd-core#31 byte for byte, except vite.config.ts (the fork override), which gets the same hunks. Both PRs start from ddd-core 8a6c80a, which #217 pulled in.

Evidence

• Before: the fork had to keep Perth's artwork inside core/.
  After: pnpm vr: 108 passed with no baseline changes. The site renders the same pixels from the new location.
• Without the fs.allow fix, vitest run had 2 failing test files (the speaker and sponsor portals). With it: 100 files, 945 tests passed (rebased onto chore(core): pull ddd-core through #30 and link core's skills #217).
• tsc (website and conference) and eslint pass. The production build's _virtual_conference-brand-*.js contains Perth's colours.

Merge Danger

Door: two-way

Blast Radius: header

It covers the logo in the header, footer and portal, plus the home-page hero. The visual suite shows no pixel change. Merge this before or with the /core-pull that brings in ddd-core#31. Pulling #31 without it would break the typecheck, because brandAssets is required.