Add unstructured mesh infrastructure - #5687

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Commits on Jul 31, 2026

feat: add unstructured mesh infrastructure

aabills
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cursoragent
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refactor: move unstructured combine logic out of meshes.py

aabills
and
claude
committed
fix: keep interface_data cell indices with their own mesh in optimize_ordering

aabills
and
claude
committed
fix: reject disconnected combined unstructured meshes

aabills
and
claude
committed
fix: harden unstructured mesh validation and follow repo conventions

aabills
and
claude
committed
test: cover file generators, tag recovery, and interface error paths

aabills
and
claude
committed