refactor: Integrate PlatformPaths for configuration directory management

- Replaced direct calls to GetConfigDirectory with PlatformPaths::GetConfigDirectory across multiple files to standardize configuration directory access.
- Updated RecentFilesManager, EditorManager, and various agent components to handle potential errors when retrieving the configuration directory.
- Enhanced file loading functions to utilize the new LoadFileFromConfigDir method for improved clarity and error handling.
- Introduced new methods in file_util.h for better file management practices, leveraging std::filesystem for cross-platform consistency.

src/app/editor/music/music_editor.cc

@@ -3,9 +3,11 @@
 #include "absl/strings/str_format.h"
 #include "app/gfx/performance_profiler.h"
 #include "app/editor/code/assembly_editor.h"
+#include "app/emu/emulator.h"
 #include "app/gui/icons.h"
 #include "app/gui/input.h"
 #include "imgui/imgui.h"
+#include "util/log.h"
 
 namespace yaze {
 namespace editor {
@@ -210,5 +212,75 @@ void MusicEditor::DrawToolset() {
   ImGui::ProgressBar((float)current_time / SONG_DURATION);
 }
 
+// ============================================================================
+// Audio Control Methods (Emulator Integration)
+// ============================================================================
+
+void MusicEditor::PlaySong(int song_id) {
+  if (!emulator_) {
+    LOG_WARN("MusicEditor", "No emulator instance - cannot play song");
+    return;
+  }
+  
+  if (!emulator_->snes().running()) {
+    LOG_WARN("MusicEditor", "Emulator not running - cannot play song");
+    return;
+  }
+  
+  // Write song request to game memory ($7E012C)
+  // This triggers the NMI handler to send the song to APU
+  try {
+    emulator_->snes().Write(0x7E012C, static_cast<uint8_t>(song_id));
+    LOG_INFO("MusicEditor", "Requested song %d (%s)", song_id, 
+             song_id < 30 ? kGameSongs[song_id] : "Unknown");
+    
+    // Ensure audio backend is playing
+    if (auto* audio = emulator_->audio_backend()) {
+      auto status = audio->GetStatus();
+      if (!status.is_playing) {
+        audio->Play();
+        LOG_INFO("MusicEditor", "Started audio backend playback");
+      }
+    }
+    
+    is_playing_ = true;
+  } catch (const std::exception& e) {
+    LOG_ERROR("MusicEditor", "Failed to play song: %s", e.what());
+  }
+}
+
+void MusicEditor::StopSong() {
+  if (!emulator_) return;
+  
+  // Write stop command to game memory
+  try {
+    emulator_->snes().Write(0x7E012C, 0xFF);  // 0xFF = stop music
+    LOG_INFO("MusicEditor", "Stopped music playback");
+    
+    // Optional: pause audio backend to save CPU
+    if (auto* audio = emulator_->audio_backend()) {
+      audio->Pause();
+    }
+    
+    is_playing_ = false;
+  } catch (const std::exception& e) {
+    LOG_ERROR("MusicEditor", "Failed to stop song: %s", e.what());
+  }
+}
+
+void MusicEditor::SetVolume(float volume) {
+  if (!emulator_) return;
+  
+  // Clamp volume to valid range
+  volume = std::clamp(volume, 0.0f, 1.0f);
+  
+  if (auto* audio = emulator_->audio_backend()) {
+    audio->SetVolume(volume);
+    LOG_DEBUG("MusicEditor", "Set volume to %.2f", volume);
+  } else {
+    LOG_WARN("MusicEditor", "No audio backend available");
+  }
+}
+
 }  // namespace editor
 }  // namespace yaze

src/app/editor/music/music_editor.h

@@ -9,6 +9,12 @@
 #include "imgui/imgui.h"
 
 namespace yaze {
+
+// Forward declaration
+namespace emu {
+class Emulator;
+}
+
 namespace editor {
 
 static const char* kGameSongs[] = {"Title",
@@ -77,6 +83,15 @@ class MusicEditor : public Editor {
 
   // Get the ROM pointer
   Rom* rom() const { return rom_; }
+  
+  // Emulator integration for live audio playback
+  void set_emulator(emu::Emulator* emulator) { emulator_ = emulator; }
+  emu::Emulator* emulator() const { return emulator_; }
+  
+  // Audio control methods
+  void PlaySong(int song_id);
+  void StopSong();
+  void SetVolume(float volume);  // 0.0 to 1.0
 
  private:
   // UI Drawing Methods
@@ -112,6 +127,7 @@ class MusicEditor : public Editor {
       ImGuiTableFlags_BordersV | ImGuiTableFlags_PadOuterX;
 
   Rom* rom_;
+  emu::Emulator* emulator_ = nullptr;  // For live audio playback
 };
 
 }  // namespace editor