feat(linear-static-3d-euler-beam): step 12 - inp-domain-mapping

include/fesa/io/abaqus/domain_mapper.hpp

@@ -0,0 +1,15 @@
+#pragma once
+
+#include "fesa/core/status.hpp"
+#include "fesa/io/abaqus/input_syntax.hpp"
+#include "fesa/model/domain.hpp"
+
+namespace fesa {
+
+// Converts syntax-only blocks into the approved immutable B33 semantic model.
+class AbaqusDomainMapper {
+public:
+    Result<Domain> map(const ParsedInput& input) const;
+};
+
+} // namespace fesa