Add queue override controls

Adds pause, stop, start, and cancel-current controls for #20.

tests/test_queue_controls.py

@@ -0,0 +1,80 @@
+from importarr.config import Settings
+from importarr.state import State
+
+
+def configure_main(tmp_path, monkeypatch):
+    monkeypatch.setenv("IMPORTARR_STATE_PATH", str(tmp_path / "initial.db"))
+    import importarr.main as main
+
+    download = tmp_path / "downloads"
+    movies = tmp_path / "movies"
+    tv = tmp_path / "tv"
+    monkeypatch.setattr(main, "settings", Settings(download_root=download, movies_root=movies, tv_root=tv, state_path=tmp_path / "state.db"))
+    monkeypatch.setattr(main, "state", State(tmp_path / "state.db"))
+    return main, download, movies, tv
+
+
+def test_pause_prevents_manual_queue_sync(tmp_path, monkeypatch):
+    main, download, _movies, _tv = configure_main(tmp_path, monkeypatch)
+    batch = download / "Release"
+    batch.mkdir(parents=True)
+    (batch / "Movie.mkv").write_bytes(b"movie")
+    main.state.add_manual_batch(batch)
+
+    main.state.set_app_state("queue_mode", "paused")
+    main.sync_manual_queue()
+
+    assert main.state.list_queue_items() == []
+
+
+def test_start_reenables_manual_queue_sync(tmp_path, monkeypatch):
+    main, download, _movies, _tv = configure_main(tmp_path, monkeypatch)
+    batch = download / "Release"
+    batch.mkdir(parents=True)
+    (batch / "Movie.mkv").write_bytes(b"movie")
+    main.state.add_manual_batch(batch)
+
+    main.state.set_app_state("queue_mode", "paused")
+    main.sync_manual_queue()
+    main.state.set_app_state("queue_mode", "running")
+    main.sync_manual_queue()
+
+    assert len(main.state.list_queue_items()) == 1
+
+
+def test_cancel_current_stops_before_next_manual_item(tmp_path, monkeypatch):
+    main, download, movies, tv = configure_main(tmp_path, monkeypatch)
+    batch = download / "Release"
+    batch.mkdir(parents=True)
+    (batch / "A.mkv").write_bytes(b"a")
+    (batch / "B.mkv").write_bytes(b"b")
+    main.state.add_manual_batch(batch)
+    main.sync_manual_queue()
+    main.state.set_app_state("cancel_requested", "true")
+
+    assert main._import_manual_batches(main.Importer(movies, tv)) == 0
+    assert len(main.state.list_queue_items()) == 2
+
+
+def test_cancel_current_stops_active_copy(tmp_path, monkeypatch):
+    main, download, movies, tv = configure_main(tmp_path, monkeypatch)
+    batch = download / "Release"
+    batch.mkdir(parents=True)
+    source = batch / "A.mkv"
+    source.write_bytes(b"a" * (1024 * 1024 + 1))
+    main.state.add_manual_batch(batch)
+    main.sync_manual_queue()
+
+    calls = 0
+
+    def cancel_during_copy() -> bool:
+        nonlocal calls
+        calls += 1
+        return calls > 1
+
+    monkeypatch.setattr(main, "consume_cancel_request", cancel_during_copy)
+
+    assert main._import_manual_batches(main.Importer(movies, tv)) == 0
+    assert source.exists()
+    assert not any(movies.glob("*.partial"))
+    assert main.state.list_queue_items(active_only=False)[0]["state"] == "skipped"