fix(harmony): discover devices and release disconnected sessions asynchronously

Use USB descriptors and MTP identity instead of the static libmtp product label. Monitor attachment, discard stale UI responses, clear disconnected views, and release slow MTP sessions in the background while preserving operation serialization.

Publish 0.1.1 with immutable source history. Cover discovery, names, unplugging and slow disconnect with native and UI regressions. Verify real Pura 70 Ultra identity and prompt disconnect; run the newest published backend during Git-source checks.

tools/host-check.rs

@@ -520,7 +520,9 @@ async fn remote_source_check(url: &str, source_id: &str, kind: &str) -> Result<(
     .await;
     if rows.iter().all(|row| row["status"] == "pass") {
         for entry in packages.catalog() {
-            for version in entry.package.versions {
+            // Our publication index puts new releases first. Install history oldest
+            // first so the runtime check below exercises the newest published build.
+            for version in entry.package.versions.into_iter().rev() {
                 check(&mut rows, format!("远程安装 {}@{}", entry.package.id, version.version), async {
                     let package = packages.install_from_source(source_id, &entry.package.id, &version.version, true).await?;
                     ensure!(package.source_id.as_deref() == Some(source_id), "Installation wasn't bound to the remote source");