Closes THE-34, THE-35, THE-36.
- Replaces all hardcoded colors in arf.css with CSS custom properties
- Dark palette defined on :root (default); light palette on body.light-mode
- Removes old .dark-Mode class; D3 inline styles now read CSS vars at render time
- goDark() toggles light-mode class and persists preference to localStorage
- Flash-prevention inline script in body applies stored theme before first paint
- Toggle button label reflects current theme state
Co-Authored-By: Paperclip <noreply@paperclip.ing>
- Replace d3.layout.tree() with d3.tree()
- Replace d3.svg.diagonal() with d3.linkHorizontal() (x/y accessors swap coords)
- Replace d3.json(url, cb) with d3.json(url).then(cb)
- Replace d3.hierarchy() for root node; use .descendants() and .links()
- Strip svg: namespace prefixes from append/insert calls
- Update xlink:href to href on anchor elements
- Update data accessors to use d.data.name, d.data.url, etc.
- Fix .style("fill") call (was malformed in v3 code)
- Update event handler signature to (event, d) for D3 v7
- Use node.merge(nodeEnter) and link.merge(linkEnter) for v5+ update pattern
- Add public/js/d3.min.js (v7.9.0) copied from node_modules
- Update index.html to load d3.min.js instead of d3.v3.min.js
- Update CI smoke test to check for d3.min.js
- Keep d3.v3.min.js in place until visual parity confirmed
Co-Authored-By: Paperclip <noreply@paperclip.ing>
