fix: add modeling.h include to test_io_gltf

tests/foundation/test_io_gltf.cpp

@@ -2,6 +2,7 @@
 #include <fstream>
 #include <cstdio>
 #include "vde/foundation/io_gltf.h"
+#include "vde/brep/modeling.h"
 
 using namespace vde::foundation;
 using namespace vde::mesh;
@@ -88,15 +89,24 @@ TEST(IoGltfTest, ExportWithNormals) {
     std::ifstream f(path, std::ios::binary);
     ASSERT_TRUE(f.good());
 
-    // Skip header (12 bytes)
-    f.seekg(12);
+    // Read header
+    uint32_t magic = 0, version = 0, total_len = 0;
+    f.read(reinterpret_cast<char*>(&magic), 4);
+    f.read(reinterpret_cast<char*>(&version), 4);
+    f.read(reinterpret_cast<char*>(&total_len), 4);
+    EXPECT_EQ(magic, 0x46546C67u);
 
-    // Read JSON chunk
+    // Read JSON chunk header
     uint32_t chunk_len = 0, chunk_type = 0;
     f.read(reinterpret_cast<char*>(&chunk_len), 4);
     f.read(reinterpret_cast<char*>(&chunk_type), 4);
+    EXPECT_EQ(chunk_type, 0x4E4F534Au);
+
+    // Read unpadded JSON data + skip padding
     std::string json(chunk_len, '\0');
     f.read(&json[0], chunk_len);
+    size_t padding = (4 - (chunk_len % 4)) % 4;
+    f.seekg(static_cast<std::streamoff>(padding), std::ios::cur);
 
     EXPECT_NE(json.find("\"NORMAL\""), std::string::npos)
         << "JSON should include NORMAL attribute when normals enabled";