fix: support orphaned *arr queue items and improve download matching reliability (#73)

tests/unit/services/DownloadBuilder.test.js

@@ -925,4 +925,158 @@ describe('buildUserDownloads', () => {
     expect(result[0].arrLink).toBe('https://sonarr.test/series/test-series');
     expect(result[1].arrLink).toBe('https://radarr.test/movie/test-movie');
   });
+
+  describe('orphaned download integration in DownloadBuilder', () => {
+    it('returns orphaned queue records when no active client match is found', async () => {
+      const cacheSnapshot = {
+        sabnzbdQueue: { data: { queue: { slots: [] } } },
+        sabnzbdHistory: { data: { history: { slots: [] } } },
+        sonarrQueue: {
+          data: {
+            records: [{
+              id: 500,
+              title: 'Genuinely Orphaned Show',
+              sourceTitle: 'Genuinely Orphaned Show',
+              seriesId: 1,
+              series: seriesMap.get(1),
+              size: 200000000,
+              sizeleft: 100000000,
+              trackedDownloadState: 'importPending',
+              trackedDownloadStatus: 'warning',
+              statusMessages: [{ messages: ['Missing files'] }]
+            }]
+          }
+        },
+        sonarrHistory: { data: { records: [] } },
+        radarrQueue: { data: { records: [] } },
+        radarrHistory: { data: { records: [] } },
+        qbittorrentTorrents: []
+      };
+
+      const result = await buildUserDownloads(cacheSnapshot, {
+        username,
+        usernameSanitized,
+        isAdmin: true,
+        showAll,
+        seriesMap,
+        moviesMap,
+        sonarrTagMap,
+        radarrTagMap,
+        embyUserMap
+      });
+
+      expect(result).toHaveLength(1);
+      expect(result[0]).toMatchObject({
+        title: 'Genuinely Orphaned Show',
+        isOrphaned: true,
+        client: 'orphaned',
+        instanceId: 'orphaned',
+        instanceName: 'Orphaned (unconfigured client)',
+        progress: 50,
+        importIssues: ['Missing files']
+      });
+    });
+
+    it('strictly deduplicates so active matched items are NOT duplicated as orphans', async () => {
+      const cacheSnapshot = {
+        sabnzbdQueue: {
+          data: {
+            queue: {
+              status: 'Downloading',
+              speed: '5.0 MB/s',
+              kbpersec: 5120,
+              slots: [{
+                filename: 'Matched Active Show',
+                nzbname: 'Matched Active Show',
+                status: 'Downloading',
+                percentage: 50,
+                mb: 1000,
+                mbmissing: 500,
+                size: '1 GB',
+                timeleft: '10:00'
+              }]
+            }
+          }
+        },
+        sabnzbdHistory: { data: { history: { slots: [] } } },
+        sonarrQueue: {
+          data: {
+            records: [{
+              id: 100,
+              downloadId: '100', // matches slot by default mock (or slot.id/nzo_id)
+              title: 'Matched Active Show',
+              sourceTitle: 'Matched Active Show',
+              seriesId: 1,
+              series: seriesMap.get(1)
+            }]
+          }
+        },
+        sonarrHistory: { data: { records: [] } },
+        radarrQueue: { data: { records: [] } },
+        radarrHistory: { data: { records: [] } },
+        qbittorrentTorrents: []
+      };
+
+      // Set slot nzo_id to match the downloadId
+      cacheSnapshot.sabnzbdQueue.data.queue.slots[0].nzo_id = '100';
+
+      const result = await buildUserDownloads(cacheSnapshot, {
+        username,
+        usernameSanitized,
+        isAdmin: true,
+        showAll,
+        seriesMap,
+        moviesMap,
+        sonarrTagMap,
+        radarrTagMap,
+        embyUserMap
+      });
+
+      // Should match the download once via SABnzbd client; should NOT list it again as an orphan
+      expect(result).toHaveLength(1);
+      expect(result[0].isOrphaned).toBeUndefined();
+      expect(result[0].client).toBe('sabnzbd');
+    });
+
+    it('filters orphaned records based on user tag matches', async () => {
+      const cacheSnapshot = {
+        sabnzbdQueue: { data: { queue: { slots: [] } } },
+        sabnzbdHistory: { data: { history: { slots: [] } } },
+        sonarrQueue: {
+          data: {
+            records: [{
+              id: 600,
+              title: 'Bobs Orphaned Show',
+              sourceTitle: 'Bobs Orphaned Show',
+              seriesId: 2, // Bob's series (tag=2, username=bob)
+              series: {
+                id: 2,
+                title: 'Bob Show',
+                tags: [2],
+                images: []
+              }
+            }]
+          }
+        },
+        sonarrHistory: { data: { records: [] } },
+        radarrQueue: { data: { records: [] } },
+        radarrHistory: { data: { records: [] } },
+        qbittorrentTorrents: []
+      };
+
+      const result = await buildUserDownloads(cacheSnapshot, {
+        username: 'alice', // alice should not see bob's orphaned downloads
+        usernameSanitized: 'alice',
+        isAdmin: false,
+        showAll: false,
+        seriesMap: new Map([[2, { id: 2, title: 'Bob Show', tags: [2], images: [] }]]),
+        moviesMap,
+        sonarrTagMap: new Map([[1, 'alice'], [2, 'bob']]),
+        radarrTagMap,
+        embyUserMap
+      });
+
+      expect(result).toEqual([]);
+    });
+  });
 });