feat(linear-static-3d-euler-beam): step 11 - inp-syntax-parser

include/fesa/io/abaqus/input_reader.hpp

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+#pragma once
+
+#include "fesa/core/status.hpp"
+#include "fesa/io/abaqus/input_syntax.hpp"
+
+#include <filesystem>
+
+namespace fesa {
+
+// Reads only physical keyword/data/comment syntax; semantic policy is applied
+// later by AbaqusDomainMapper.
+class AbaqusInputReader {
+public:
+    Result<ParsedInput> read(const std::filesystem::path& inputPath) const;
+};
+
+} // namespace fesa

include/fesa/io/abaqus/input_syntax.hpp

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+#pragma once
+
+#include "fesa/core/source_identity.hpp"
+
+#include <filesystem>
+#include <optional>
+#include <string>
+#include <vector>
+
+namespace fesa {
+
+// Names are canonicalized for syntax lookup while values remain source text.
+struct KeywordParameter {
+    std::string name;
+    std::optional<std::string> value;
+};
+
+struct DataLine {
+    std::vector<std::string> fields;
+    SourceLocation location;
+};
+
+struct KeywordBlock {
+    std::string canonicalName;
+    std::string originalLine;
+    std::vector<KeywordParameter> parameters;
+    std::vector<DataLine> data;
+    SourceLocation location;
+};
+
+struct ParsedInput {
+    std::filesystem::path sourcePath;
+    std::string sourceContentIdentity;
+    std::vector<KeywordBlock> blocks;
+};
+
+} // namespace fesa