test(torrents): harden runtime smoke harness

src-tauri/tests/README.md

@@ -23,3 +23,21 @@ cd src-tauri
 FIRELINK_LIVE_YOUTUBE_URL='https://www.youtube.com/watch?v=dQw4w9WgXcQ' \
   cargo test filters_live_youtube_metadata_from_env --lib -- --ignored --nocapture
 ```
+
+Run the real local Torrent runtime smoke test against the host bundled Aria2
+binary. It starts a local tracker and two Aria2 daemons, then covers magnet
+metadata resolution, saved-metadata hash validation, selected-file output,
+pause/resume, ownership reporting, and cancel/remove:
+
+```sh
+npm run smoke:torrent
+```
+
+Use `node scripts/smoke-torrent.js --binary /path/to/aria2c` when validating a
+packaged or target-specific Aria2 binary.
+
+Run the deterministic unavailable-tracker and Aria2-daemon-exit checks with:
+
+```sh
+npm run smoke:torrent:failure-paths
+```