refactor(platform): Encapsulate state in PlatformState struct

- Replaced all global static variables in the platform layer with a single PlatformState struct.
- Updated all platform function signatures to accept a pointer to this struct, making the implementation stateless and more modular.
- Refactored main.cc, tests, and tools to instantiate and pass the PlatformState struct.
- This improves code organization and removes scattered global state.

1 files changed, 5 insertions, 4 deletions

diff --git a/tools/spectool.cc b/tools/spectool.cc
index dfb00de..19f3a2f 100644
--- a/tools/spectool.cc
+++ b/tools/spectool.cc
@@ -131,7 +131,8 @@ int play_spec(const char* in_path) {
   fread(spec_data.data(), sizeof(float), spec_data.size(), f_in);
   fclose(f_in);
 
-  platform_init_window(false, nullptr, nullptr);
+  PlatformState platform_state = {};
+  platform_init(&platform_state, false, nullptr, nullptr);
   audio_init();
   audio_start();
   Spectrogram spec;
@@ -144,12 +145,12 @@ int play_spec(const char* in_path) {
   synth_trigger_voice(spec_id, 0.7f, 0.0f);
 
   printf("Playing... Press Ctrl+C to exit.\n");
-  while (synth_get_active_voice_count() > 0 && !platform_should_close()) {
-    platform_poll();
+  while (synth_get_active_voice_count() > 0 && !platform_should_close(&platform_state)) {
+    platform_poll(&platform_state);
   }
 
   audio_shutdown();
-  platform_shutdown();
+  platform_shutdown(&platform_state);
 
   return 0;
 }