Zero-dependency, tolerant XML reader (elements/attrs/text/comments/prolog/
CDATA/entities; <style> read as raw text) producing a generic element tree.
The normalizer folds d2/graphviz's class-based <style> rules into inline
presentation attributes — cascade presentation-attr < tag < class < style —
then drops <style>/class/style, so the painter only ever sees inline attrs
(D-103). Flutter-free, covered by dart test (26 cases). No user-visible
behaviour yet.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
jpmschweitzerandClaude Opus 4.8
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