add(chore): bulk requests

tests/test_import_flow.py

@@ -106,3 +106,31 @@ def test_import_rejects_path_outside_download_dir(client):
         "path": str(outside), "is_dir": False, "files": [str(outside)], "request_id": req_id,
     }]})
     assert resp.json()["results"][0]["ok"] is False
+
+
+def test_bulk_requests_and_split_scan(client):
+    root = client.tmp_path / "library" / "audio"
+    lib_id = client.post("/api/libraries", json={
+        "name": "Hoerspiele", "media_type": "audiobook", "root_path": str(root),
+    }).json()["id"]
+    resp = client.post("/api/requests/bulk", json={
+        "library_id": lib_id, "series": "Die drei ???", "volume_from": 1, "volume_to": 3,
+    })
+    assert resp.status_code == 200
+    created = resp.json()
+    assert [r["title"] for r in created] == [
+        "Die drei ??? Folge 01", "Die drei ??? Folge 02", "Die drei ??? Folge 03",
+    ]
+
+    folder = client.downloads / "Die drei Fragezeichen Sammlung"
+    folder.mkdir()
+    for n in (1, 2, 3):
+        (folder / f"Die drei Fragezeichen - Folge {n:03d}.mp3").write_bytes(b"a")
+
+    # default scan: one audiobook unit; split scan: three individual files
+    assert len(client.get("/api/import/scan").json()["items"]) == 1
+    items = client.get("/api/import/scan", params={"split_dirs": "true"}).json()["items"]
+    assert len(items) == 3
+    by_name = {i["name"]: i["suggested_request_id"] for i in items}
+    expected = {f"Die drei Fragezeichen - Folge {n:03d}": created[n - 1]["id"] for n in (1, 2, 3)}
+    assert by_name == expected