test: run ephemeral dir tests sequentially

src-tauri/src/ephemeral_dirs.rs

@@ -283,6 +283,9 @@ mod tests {
   #[test]
   #[serial_test::serial]
   fn test_ephemeral_dir_lifecycle() {
+    // Clear global state to avoid interference from other tests
+    EPHEMERAL_DIRS.lock().unwrap().clear();
+
     let profile_id = uuid::Uuid::new_v4();
     let id_str = profile_id.to_string();