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/overlap.rs

@@ -65,7 +65,7 @@ fn now_secs() -> u64 {
     SystemTime::now().duration_since(UNIX_EPOCH).map(|d| d.as_secs()).unwrap_or(0)
 }
 fn path(app: &tauri::AppHandle) -> Result<PathBuf, String> {
-    Ok(app.path().app_data_dir().map_err(|e| e.to_string())?.join("overlap.json"))
+    Ok(crate::paths::app_data(app).map_err(|e| e.to_string())?.join("overlap.json"))
 }
 fn load(app: &tauri::AppHandle) -> Ledger {
     path(app)