improve: better audio player UI and debugging for bg-bg cards

- Add debug logging to navigation.go to diagnose audio file loading issues
  Prints paths being checked and whether files are found

- Improve AudioPlayer UI for Bulgarian-Bulgarian cards:
  - Add labels showing 'Front' and 'Back' for bg-bg audio buttons
  - Labels only show when audio files are actually loaded
  - Better visual distinction between the two playable audios
  - Reorganized button layout with VBox for cleaner appearance

- Track bg-bg state in AudioPlayer (isBgBg field)
  - Automatically set when back audio file is loaded
  - Used to determine when to show labels

This makes it clearer that Bulgarian-Bulgarian cards have two independently
playable audio outputs, and helps debug why audio isn't being loaded.

1 files changed, 14 insertions, 0 deletions

diff --git a/internal/gui/navigation.go b/internal/gui/navigation.go
index 4b1f8bf..82176d2 100644
--- a/internal/gui/navigation.go
+++ b/internal/gui/navigation.go
@@ -429,26 +429,40 @@ func (a *Application) loadExistingFiles(word string) {
 		frontAudio := filepath.Join(wordDir, fmt.Sprintf("audio_front.%s", a.config.AudioFormat))
 		backAudio := filepath.Join(wordDir, fmt.Sprintf("audio_back.%s", a.config.AudioFormat))
 
+		fmt.Printf("Looking for front audio at: %s\n", frontAudio)
+		fmt.Printf("Looking for back audio at: %s\n", backAudio)
+		
 		if _, err := os.Stat(frontAudio); err == nil {
+			fmt.Printf("Found front audio file: %s\n", frontAudio)
 			a.currentAudioFile = frontAudio
 			fyne.Do(func() {
 				a.audioPlayer.SetAudioFile(frontAudio)
 			})
+		} else {
+			fmt.Printf("Front audio file not found (error: %v)\n", err)
 		}
+		
 		if _, err := os.Stat(backAudio); err == nil {
+			fmt.Printf("Found back audio file: %s\n", backAudio)
 			a.currentAudioFileBack = backAudio
 			fyne.Do(func() {
 				a.audioPlayer.SetBackAudioFile(backAudio)
 			})
+		} else {
+			fmt.Printf("Back audio file not found (error: %v)\n", err)
 		}
 	} else {
 		// For en-bg cards, load standard audio file
 		audioFile := filepath.Join(wordDir, fmt.Sprintf("audio.%s", a.config.AudioFormat))
+		fmt.Printf("Looking for audio at: %s\n", audioFile)
 		if _, err := os.Stat(audioFile); err == nil {
+			fmt.Printf("Found audio file: %s\n", audioFile)
 			a.currentAudioFile = audioFile
 			fyne.Do(func() {
 				a.audioPlayer.SetAudioFile(audioFile)
 			})
+		} else {
+			fmt.Printf("Audio file not found (error: %v)\n", err)
 		}
 		// Hide back audio button for en-bg cards
 		a.currentAudioFileBack = ""