feat(ui): modernize desktop interactions

src/utils/downloadActions.ts

@@ -0,0 +1,38 @@
+import type { DownloadStatus } from '../bindings/DownloadStatus';
+
+const STARTABLE_STATUSES: ReadonlySet<DownloadStatus> = new Set([
+  'ready',
+  'paused',
+  'failed',
+]);
+
+const PAUSABLE_STATUSES: ReadonlySet<DownloadStatus> = new Set([
+  'queued',
+  'downloading',
+  'processing',
+  'retrying',
+]);
+
+const REDOWNLOADABLE_STATUSES: ReadonlySet<DownloadStatus> = new Set([
+  'completed',
+  'failed',
+  'paused',
+]);
+
+export const canStartDownload = (status: DownloadStatus): boolean =>
+  STARTABLE_STATUSES.has(status);
+
+export const canPauseDownload = (status: DownloadStatus): boolean =>
+  PAUSABLE_STATUSES.has(status);
+
+export const canRedownload = (status: DownloadStatus): boolean =>
+  REDOWNLOADABLE_STATUSES.has(status);
+
+export const startActionLabel = (status: DownloadStatus): 'Start' | 'Resume' =>
+  status === 'ready' || status === 'failed' ? 'Start' : 'Resume';
+
+export const isTransferLocked = (status: DownloadStatus): boolean =>
+  status === 'downloading' || status === 'processing' || status === 'retrying';
+
+export const isIdentityLocked = (status: DownloadStatus): boolean =>
+  isTransferLocked(status) || status === 'completed';