fix: Resolve macOS build breakage and restore tools audio support

Updates gpu.cc to handle modern wgpu-native callback signatures (5 args) for macOS while maintaining Windows compatibility. Modifies audio.cc and CMakeLists.txt to ensure miniaudio encoding features are only stripped from the demo binary, not the tools (spectool/tests).

1 files changed, 2 insertions, 0 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
index d25065c..b793b05 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -220,6 +220,7 @@ if(DEMO_BUILD_TESTS)
         ${WGPU_INCLUDE_DIR}
         third_party/glfw3webgpu
     )
+    target_compile_definitions(test_spectool PRIVATE DEMO_BUILD_TOOLS)
     target_link_libraries(test_spectool PRIVATE ${DEMO_LIBS})
     add_test(NAME SpectoolEndToEndTest COMMAND test_spectool)
 
@@ -255,6 +256,7 @@ if(DEMO_BUILD_TOOLS OR DEMO_BUILD_TESTS)
         ${WGPU_INCLUDE_DIR}
         third_party/glfw3webgpu
     )
+    target_compile_definitions(spectool PRIVATE DEMO_BUILD_TOOLS)
     target_link_libraries(spectool PRIVATE ${DEMO_LIBS})
 
     add_executable(specview