add sentences borders enable in pc player

sentence_api/tests/test_api.py

@@ -80,6 +80,42 @@ def test_invalid_hash_is_rejected(tmp_path):
     assert response.status_code == 422
 
 
+def test_adhoc_audio_boundaries_do_not_persist_audio(tmp_path, monkeypatch):
+    client = make_client(tmp_path)
+    upload = tmp_path / "audio.wav"
+    upload.write_bytes(b"not-a-real-audio")
+
+    import sentence_api.processing as processing_module
+
+    monkeypatch.setattr(processing_module, "detect_sentence_boundaries", lambda path: [0.0, 1.0])
+    monkeypatch.setattr(processing_module, "media_duration_ms", lambda path: 2000)
+
+    response = client.post(
+        "/api/v1/audio/sentence-boundaries",
+        files={"file": ("audio.wav", upload.read_bytes(), "audio/wav")},
+    )
+
+    assert response.status_code == 200, response.text
+    payload = response.json()
+    assert payload["algorithm_version"] == "silence-rms-v1"
+    assert payload["duration_ms"] == 2000
+    assert [(item["start_ms"], item["end_ms"]) for item in payload["sentences"]] == [(0, 1000), (1000, 2000)]
+    assert not (tmp_path / "data" / "work").exists() or not any((tmp_path / "data" / "work").iterdir())
+    assert not (tmp_path / "data" / "v").exists() or not any((tmp_path / "data" / "v").iterdir())
+
+
+def test_adhoc_audio_boundaries_require_login(tmp_path):
+    client = make_client(tmp_path)
+    client.headers.clear()
+
+    response = client.post(
+        "/api/v1/audio/sentence-boundaries",
+        files={"file": ("audio.wav", b"audio", "audio/wav")},
+    )
+
+    assert response.status_code == 401
+
+
 def test_sentence_explanation_requires_login(tmp_path):
     index_path = tmp_path / "boundaries.json"
     index_path.write_text("{}", encoding="utf-8")