fix: preserve download context when re-organizing from history

tests/test_transfer_history_retransfer.py

@@ -0,0 +1,54 @@
+from types import ModuleType, SimpleNamespace
+import sys
+
+# The endpoint import pulls in a wide plugin/helper graph. Some optional modules are
+# not present in this test environment, so stub them before importing the endpoint.
+sys.modules.setdefault("app.helper.sites", ModuleType("app.helper.sites"))
+setattr(sys.modules["app.helper.sites"], "SitesHelper", object)
+
+from app.api.endpoints.transfer import manual_transfer
+from app.schemas import ManualTransferItem
+
+
+def test_manual_transfer_from_history_preserves_download_context(monkeypatch):
+    history = SimpleNamespace(
+        status=0,
+        mode="copy",
+        src_fileitem={"storage": "local", "path": "/downloads/test.mkv", "name": "test.mkv", "type": "file"},
+        dest_fileitem=None,
+        downloader="qbittorrent",
+        download_hash="abc123",
+        type="电视剧",
+        tmdbid="100",
+        doubanid="200",
+        seasons="S01",
+        episodes="E01-E02",
+        episode_group="WEB-DL",
+    )
+
+    captured = {}
+
+    def fake_get(_db, logid):
+        assert logid == 1
+        return history
+
+    class FakeTransferChain:
+        def manual_transfer(self, **kwargs):
+            captured.update(kwargs)
+            return True, ""
+
+    monkeypatch.setattr("app.api.endpoints.transfer.TransferHistory.get", fake_get)
+    monkeypatch.setattr("app.api.endpoints.transfer.TransferChain", FakeTransferChain)
+
+    resp = manual_transfer(
+        transer_item=ManualTransferItem(logid=1, from_history=True),
+        background=True,
+        db=object(),
+        _="token",
+    )
+
+    assert resp.success is True
+    assert captured["downloader"] == "qbittorrent"
+    assert captured["download_hash"] == "abc123"
+    assert captured["episode_group"] == "WEB-DL"
+    assert captured["season"] == 1