a second instance on one machine: its own data, its own peer port, and a join that says itself again when it was never seated

src-tauri/src/lyric_align.rs

@@ -19,7 +19,7 @@ use std::collections::HashMap;
 use std::path::PathBuf;
 use std::sync::Mutex;
 
-use tauri::{Emitter, Manager};
+use tauri::Emitter;
 use windows::{
     core::{Interface, HSTRING},
     AI::MachineLearning::{
@@ -51,9 +51,7 @@ struct Engine {
 static ENGINE: Mutex<Option<Engine>> = Mutex::new(None);
 
 pub(crate) fn models_dir(app: &tauri::AppHandle) -> Result<PathBuf, String> {
-    let dir = app
-        .path()
-        .app_data_dir()
+    let dir = crate::paths::app_data(app)
         .map_err(|e| e.to_string())?
         .join("lyric-models");
     std::fs::create_dir_all(&dir).map_err(|e| e.to_string())?;