v2 download API and Admin UI fixes (#177)

* fix: small ui fixes

* feat: #171

* fix: improvements to library scanning on admin UI

* feat: v2 download API

* fix: add download context cleanup

* fix: lint

server/server/tasks/downloadCleanup.ts

@@ -0,0 +1,11 @@
+import contextManager from "../internal/downloads/coordinator";
+
+export default defineTask({
+  meta: {
+    name: "downloadCleanup",
+  },
+  async run() {
+    await contextManager.cleanup();
+    return { result: true };
+  },
+});