fix: blocklist-search queue ID type mismatch and bump version to 1.7.16

- Cast arrQueueId to String in both sides of the download lookup comparison
  in /api/dashboard/blocklist-search to resolve false-negative match failure
  caused by DOM dataset string vs Radarr/Sonarr API number type mismatch
- Add regression integration test for string-vs-number arrQueueId matching
- Bump version to 1.7.16, update CHANGELOG.md, openapi.yaml, and JSDoc examples

Resolves #48

tests/integration/dashboard.test.js

@@ -972,6 +972,38 @@ describe('POST /api/dashboard/blocklist-search', () => {
     expect(res.body.ok).toBe(true);
     mockGetAllDownloads.mockRestore();
   });
+
+  it('matches download correctly when arrQueueId is sent as a string but stored as a number (type mismatch regression)', async () => {
+    // Regression test for GitHub #48: arrQueueId from the SPA DOM dataset is always
+    // a string, but the value stored in allDownloads from the Radarr/Sonarr API is a number.
+    // Without String() casting the === comparison fails and returns 403.
+    const app = createApp({ skipRateLimits: true });
+    const { cookies, csrf, csrfCookie } = await getAuthHeaders(app);
+
+    const downloadClientRegistry = require('../../server/utils/downloadClients');
+    const mockGetAllDownloads = vi.spyOn(downloadClientRegistry, 'getAllDownloads').mockResolvedValue([
+      // arrQueueId stored as a number (as Radarr API returns it)
+      { arrQueueId: 9050001, arrType: 'radarr', importIssues: [], qbittorrent: null }
+    ]);
+
+    nock(RADARR_BASE)
+      .delete('/api/v3/queue/9050001')
+      .query({ removeFromClient: 'true', blocklist: 'true' })
+      .reply(200, {});
+    nock(RADARR_BASE)
+      .post('/api/v3/command')
+      .reply(200, {});
+
+    const res = await request(app)
+      .post('/api/dashboard/blocklist-search')
+      .set('Cookie', [...cookies, csrfCookie].join('; '))
+      .set('X-CSRF-Token', csrf)
+      // arrQueueId sent as a STRING from the client (as the SPA DOM dataset does)
+      .send({ arrQueueId: '9050001', arrType: 'radarr', arrInstanceUrl: RADARR_BASE, arrInstanceKey: 'rk', arrContentId: 77, arrContentType: 'movie' });
+    expect(res.status).toBe(200);
+    expect(res.body.ok).toBe(true);
+    mockGetAllDownloads.mockRestore();
+  });
 });
 
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