Keep NAND moves internal and prevent destination overwrite races

.github/workflows/build.yml

@@ -46,3 +46,30 @@ jobs:
 
       - name: Test
         run: dotnet test translator/Translator.sln -c Release --no-build --verbosity normal
+
+  nand:
+    name: NAND regression tests (${{ matrix.os }})
+    runs-on: ${{ matrix.os }}
+    timeout-minutes: 10
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [windows-latest, ubuntu-latest, macos-14]
+    steps:
+      - uses: actions/checkout@v7
+        with:
+          persist-credentials: false
+      - name: Compile and run NAND tests
+        shell: bash
+        run: |
+          flags=(-std=c++17 -Wall -Wextra -Werror)
+          if [[ "$RUNNER_OS" != Windows ]]; then flags+=(-pthread); fi
+          clang++ "${flags[@]}" -Iruntime/src/hle/storage \
+            runtime/tests/nand_move_tests.cpp runtime/src/hle/storage/nand_file_ops.cpp \
+            -o "$RUNNER_TEMP/nand_move_tests.exe"
+          "$RUNNER_TEMP/nand_move_tests.exe"
+          for test in nand_save nand_settings; do
+            clang++ "${flags[@]}" -Iruntime/include "runtime/tests/${test}_tests.cpp" \
+              -o "$RUNNER_TEMP/${test}_tests.exe"
+            "$RUNNER_TEMP/${test}_tests.exe"
+          done