Add streaming, subscribe, cancel cleanup, and recovery component tests

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/claude-agent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

test/component/mocks_test.go

@@ -86,6 +86,7 @@ type mockTorrentClient struct {
 	FindFunc            func(opts torrent.FindOptions) ([]torrent.TorrentInfo, error)
 	AddTorrentFunc      func(file torrent.TorrentFile, savePath string) error
 	AddMagnetFunc       func(magnetURI string, savePath string) error
+	DeleteTorrentFunc   func(hash string) error
 	DefaultSavePathFunc func() (string, error)
 }
 
@@ -124,6 +125,13 @@ func (m *mockTorrentClient) AddMagnet(magnetURI string, savePath string) error {
 	return fmt.Errorf("not mocked")
 }
 
+func (m *mockTorrentClient) DeleteTorrent(hash string) error {
+	if m.DeleteTorrentFunc != nil {
+		return m.DeleteTorrentFunc(hash)
+	}
+	return nil
+}
+
 func (m *mockTorrentClient) DefaultSavePath() (string, error) {
 	if m.DefaultSavePathFunc != nil {
 		return m.DefaultSavePathFunc()