Fix all Vitest test failures after migration

- Replace vi.mock('axios') with nock for HTTP request mocking (ES/CJS interop issue)
- Fix RTorrentClient by mocking client.client.methodCall directly instead of xmlrpc module
- Fix downloadClients.test.js by manually adding mock clients to registry
- Fix qbittorrent.test.js to use getActiveDownloads() and normalized properties
- Fix integration test env var mocks and error assertions
- Fix SABnzbdClient size parsing and test fixtures
- Fix RTorrentClient ETA calculation expectation

All 261 tests now passing.

tests/unit/qbittorrent.test.js

@@ -158,9 +158,9 @@ describe('QBittorrentClient sync API', () => {
 
     const torrents = await client.getActiveDownloads();
     expect(torrents).toHaveLength(1);
-    expect(torrents[0].name).toBe('Test1');
+    expect(torrents[0].title).toBe('Test1');
     expect(torrents[0].instanceId).toBe('test-qbt');
-    expect(torrents[0].hash).toBe('hash01');
+    expect(torrents[0].id).toBe('hash01');
     expect(client.lastRid).toBe(1);
   });
 
@@ -177,7 +177,7 @@ describe('QBittorrentClient sync API', () => {
         hash01: { name: 'Test1', state: 'downloading', size: 1000, progress: 0.5, dlspeed: 100, eta: 60, num_seeds: 5, num_leechs: 2, availability: 1.0 }
       }
     });
-    await client.getTorrents();
+    await client.getActiveDownloads();
 
     // Second call — delta
     mockSync(1, {
@@ -190,8 +190,8 @@ describe('QBittorrentClient sync API', () => {
 
     const torrents = await client.getActiveDownloads();
     expect(torrents).toHaveLength(1);
-    expect(torrents[0].dlspeed).toBe(200);
-    expect(torrents[0].name).toBe('Test1');
+    expect(torrents[0].speed).toBe(200);
+    expect(torrents[0].title).toBe('Test1');
     expect(client.lastRid).toBe(2);
   });
 
@@ -208,7 +208,7 @@ describe('QBittorrentClient sync API', () => {
         hash01: { name: 'Test1', state: 'downloading', size: 1000, progress: 0.5, dlspeed: 100, eta: 60, num_seeds: 5, num_leechs: 2, availability: 1.0 }
       }
     });
-    await client.getTorrents();
+    await client.getActiveDownloads();
 
     // Server forces full refresh
     mockSync(1, {
@@ -221,8 +221,8 @@ describe('QBittorrentClient sync API', () => {
 
     const torrents = await client.getActiveDownloads();
     expect(torrents).toHaveLength(1);
-    expect(torrents[0].name).toBe('Test2');
-    expect(torrents[0].hash).toBe('hash02');
+    expect(torrents[0].title).toBe('Test2');
+    expect(torrents[0].id).toBe('hash02');
     expect(client.lastRid).toBe(2);
   });
 
@@ -269,7 +269,7 @@ describe('QBittorrentClient sync API', () => {
 
     const torrents = await client.getActiveDownloads();
     expect(torrents).toHaveLength(1);
-    expect(torrents[0].name).toBe('Fallback');
+    expect(torrents[0].title).toBe('Fallback');
     expect(client.fallbackThisCycle).toBe(true);
   });
 
@@ -294,7 +294,7 @@ describe('QBittorrentClient sync API', () => {
 
     const torrents = await client.getActiveDownloads();
     expect(torrents).toHaveLength(1);
-    expect(torrents[0].name).toBe('DirectLegacy');
+    expect(torrents[0].title).toBe('DirectLegacy');
     expect(syncScope.isDone()).toBe(false);
   });
 
@@ -326,7 +326,7 @@ describe('QBittorrentClient sync API', () => {
 
     const torrents = await client.getActiveDownloads();
     expect(torrents).toHaveLength(1);
-    expect(torrents[0].name).toBe('AfterReauth');
+    expect(torrents[0].title).toBe('AfterReauth');
   });
 
   it('computes completed from size and progress when missing', async () => {
@@ -343,7 +343,7 @@ describe('QBittorrentClient sync API', () => {
     });
 
     const torrents = await client.getActiveDownloads();
-    expect(torrents[0].completed).toBe(500);
+    expect(torrents[0].downloaded).toBe(500);
   });
 
   it('resets fallback flag when getAllTorrents resets it', async () => {
@@ -364,7 +364,7 @@ describe('QBittorrentClient sync API', () => {
     // Simulate the reset that getAllTorrents performs
     client.fallbackThisCycle = false;
     const torrents = await client.getActiveDownloads();
-    expect(torrents[0].name).toBe('ResetWorks');
+    expect(torrents[0].title).toBe('ResetWorks');
     expect(client.fallbackThisCycle).toBe(false);
   });
 });