scylla-archviz

Improve code tab readability: change font stack, increase font sizes, and boost diff line contrast

Show context-aware empty state when a diff level has no nodes

Move diff-graph.js to data/ directory and update script path

Add data/diff-raw.js for code review tab and clean up nul artifact

Add 'Go to Code' navigation, node double-click, file tree sidebar, code review mode, and Dracula theme