refactor(api): make audio tagging and decryption async to avoid UI blocking

src-tauri/src/lib.rs

@@ -12,13 +12,22 @@ fn greet(name: &str) -> String {
 
 /// Tag an audio file with metadata, cover art, and lyrics
 #[tauri::command]
-fn tag_audio_file(
+async fn tag_audio_file(
     path: String,
     metadata: tagger::TaggingMetadata,
     cover_data: Option<Vec<u8>>,
     embed_lyrics: bool,
 ) -> Result<(), String> {
-    tagger::tag_audio_file(&path, &metadata, cover_data.as_deref(), embed_lyrics)
+    // Run tagging on a background thread to avoid blocking the UI
+    tauri::async_runtime::spawn_blocking(move || {
+        tagger::tag_audio_file(&path, &metadata, cover_data.as_deref(), embed_lyrics)
+    })
+    .await
+    .map_err(|e| format!("Tagging task failed: {}", e))?
+    // Flatten the inner Result
+    ?;
+
+    Ok(())
 }
 
 /// Read metadata from an audio file (MP3 or FLAC)
@@ -29,8 +38,15 @@ fn read_audio_metadata(path: String) -> Result<metadata::AudioMetadata, String>
 
 /// Decrypt Deezer track data
 #[tauri::command]
-fn decrypt_deezer_track(data: Vec<u8>, track_id: String) -> Result<Vec<u8>, String> {
-    Ok(deezer_crypto::decrypt_track(&data, &track_id))
+async fn decrypt_deezer_track(data: Vec<u8>, track_id: String) -> Result<Vec<u8>, String> {
+    // Run decryption on a background thread to avoid blocking the UI
+    let result = tauri::async_runtime::spawn_blocking(move || {
+        deezer_crypto::decrypt_track(&data, &track_id)
+    })
+    .await
+    .map_err(|e| format!("Decryption task failed: {}", e))?;
+
+    Ok(result)
 }
 
 #[cfg_attr(mobile, tauri::mobile_entry_point)]