simplified code across the app and consolidated duplicated helpers

lib/utils/downloads/download_job.dart

@@ -35,11 +35,7 @@ class DownloadFailed extends DownloadStatus {
 /// the same job. Kept engine-agnostic on purpose — the native
 /// `background_downloader` task lives entirely inside [DownloadManager].
 class DownloadJob {
-  DownloadJob({
-    required this.remotePath,
-    required this.name,
-    this.remoteFile,
-  });
+  DownloadJob({required this.remotePath, required this.name, this.remoteFile});
 
   final String remotePath;
   final String name;
@@ -59,10 +55,7 @@ class DownloadJob {
     const DownloadInProgress(0),
   );
 
-  bool get isFinished =>
-      status.value is DownloadDone ||
-      status.value is DownloadFailed ||
-      status.value is DownloadCancelled;
+  bool get isFinished => status.value is! DownloadInProgress;
 
   bool get isDone => status.value is DownloadDone;
   bool get isFailed => status.value is DownloadFailed;

lib/utils/downloads/download_manager.dart

@@ -237,9 +237,7 @@ class DownloadManager {
         // instead of freezing at the last percent.
         job.status.value = const DownloadCancelled();
       }
-      _jobs.remove(job.remotePath);
-      if (taskId != null) _byTaskId.remove(taskId);
-      scheduleMicrotask(job.dispose);
+      _forget(job);
     }
     _refreshVisible();
   }
@@ -330,10 +328,14 @@ class DownloadManager {
   // --- bookkeeping -----------------------------------------------------------
 
   void _remove(DownloadJob job) {
+    _forget(job);
+    _refreshVisible();
+  }
+
+  void _forget(DownloadJob job) {
     _jobs.remove(job.remotePath);
     final taskId = job.taskId;
     if (taskId != null) _byTaskId.remove(taskId);
-    _refreshVisible();
     scheduleMicrotask(job.dispose);
   }