fix(downloads): block ambiguous episode actions

libs/ui/components/src/lib/season-container/season-container.component.spec.ts

@@ -615,6 +615,29 @@ describe('SeasonContainerComponent', () => {
         );
     });
 
+    it('blocks episode and season actions when managed rows claim an ambiguous identity', () => {
+        const episode = createEpisode();
+        downloadsServiceStub.downloads.set([
+            createDownload(episode, { id: 71, xtreamId: 9001 }),
+            createDownload(episode, { id: 72, xtreamId: 9002 }),
+        ]);
+        enableDownloads();
+        setRequiredInputs({ '1': [episode] });
+
+        fixture.detectChanges();
+
+        const action = episodeAction(episode.id);
+        const seasonButton = fixture.nativeElement.querySelector(
+            '[data-test-id="download-season"]'
+        ) as HTMLButtonElement;
+        expect(action.disabled).toBe(true);
+        expect(action.querySelector('mat-icon')?.textContent).toContain(
+            'block'
+        );
+        expect(seasonButton.disabled).toBe(true);
+        expect(downloadsServiceStub.startDownload).not.toHaveBeenCalled();
+    });
+
     it('gives the grid and list view radios localized accessible names', () => {
         TestBed.inject(TranslateService).setTranslation(
             'en',
@@ -872,14 +895,14 @@ describe('SeasonContainerComponent', () => {
         ]);
         const candidateSpy = jest.spyOn(downloadAdapter, 'createCandidate');
         const coordinator = TestBed.inject(SeasonDownloadCoordinator);
-        const findDownloadSpy = jest.spyOn(coordinator, 'findDownload');
+        const resolveDownloadSpy = jest.spyOn(coordinator, 'resolveDownload');
         enableDownloads();
         setRequiredInputs({ '1': [paused, local] });
 
         fixture.detectChanges();
         fixture.detectChanges();
         expect(candidateSpy).toHaveBeenCalledTimes(2);
-        expect(findDownloadSpy).toHaveBeenCalledTimes(2);
+        expect(resolveDownloadSpy).toHaveBeenCalledTimes(2);
 
         episodeAction(101).click();
         episodeAction(102).click();
@@ -887,7 +910,7 @@ describe('SeasonContainerComponent', () => {
         fixture.detectChanges();
 
         expect(candidateSpy).toHaveBeenCalledTimes(2);
-        expect(findDownloadSpy).toHaveBeenCalledTimes(2);
+        expect(resolveDownloadSpy).toHaveBeenCalledTimes(2);
     });
 
     it('resumes by managed row id and plays the coordinate-matched local file', async () => {

libs/ui/components/src/lib/season-container/season-download-presenter.ts

@@ -131,9 +131,12 @@ export class SeasonDownloadPresenter {
             const pending = candidate
                 ? this.coordinator.isPending(candidate.identity)
                 : false;
-            const download = candidate
-                ? this.coordinator.findDownload(candidate.identity)
-                : undefined;
+            const resolution = candidate
+                ? this.coordinator.resolveDownload(candidate.identity)
+                : { kind: 'missing' as const };
+            const download =
+                resolution.kind === 'match' ? resolution.download : undefined;
+            const identityConflict = resolution.kind === 'conflict';
             return {
                 candidate,
                 download,
@@ -142,14 +145,15 @@ export class SeasonDownloadPresenter {
                     downloadsAvailable &&
                     downloadsReady &&
                     !pending &&
-                    isEpisodeDownloadEligible(download)
+                    isEpisodeDownloadEligible(resolution)
                 ),
                 episode,
                 presentation: this.createPresentation(
                     candidate,
                     download,
                     pending,
-                    downloadsReady
+                    downloadsReady,
+                    identityConflict
                 ),
             };
         });
@@ -281,9 +285,10 @@ export class SeasonDownloadPresenter {
         candidate: EpisodeDownloadCandidate | null,
         download: DownloadItem | undefined,
         pending: boolean,
-        downloadsReady: boolean
+        downloadsReady: boolean,
+        identityConflict: boolean
     ): EpisodeDownloadPresentation {
-        if (!candidate || !downloadsReady) {
+        if (!candidate || !downloadsReady || identityConflict) {
             return EPISODE_DOWNLOAD_STATES.blocked;
         }
         if (