Migrate Gitea remotes to git.tensordesign.com.au. Add assetUrl() utility
that resolves image paths from Gitea ParsonsAssets repo when
STORYBOOK_ASSET_BASE is set, enabling images on Chromatic-published
Storybook while keeping local dev unchanged via staticDirs.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
