Boundary flux on degree-3 traces: per-slot DOF identity, true edge-node coordinates, and the consistent line mass (#459) - #537

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bugfix/issue-459-p3-trace

Aug 13, 2026

Commits on Aug 13, 2026

2D boundary flux: give every trace node its own coordinate — degree-3 recovery was silently wrong (#459)
lmoresi
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Tests for #459: degree-sweep oracle, interior-node placement, collapse negative control, np2 arm
lmoresi
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