接入 Autocal 实时相机及帧时间显示

视频和相机共用 Finger worker，并保留采集时间、源帧编号及媒体时间。通过界面、采集链和真实视频验证。

apps/autocal/tests/test_finger_source_panel.py

@@ -71,9 +71,33 @@ def test_sensor_tab_is_live_panel_and_paths_are_saved(make_window, tmp_dir):
     assert window.workspace.page("sensor") is window.finger_source_panel
     window.finger_source_panel.video_path.setText(str(tmp_dir / "input.mp4"))
     window.finger_source_panel.config_ref.setText(str(tmp_dir / "sensor.json"))
+    window.finger_source_panel.source_kind.setCurrentIndex(1)
+    window.finger_source_panel.camera_index.setValue(3)
     window._persist_prefs()
     assert window.prefs["finger_video_path"].endswith("input.mp4")
     assert window.prefs["finger_config_ref"].endswith("sensor.json")
+    assert window.prefs["finger_source_kind"] == "camera"
+    assert window.prefs["finger_camera_index"] == 3
+
+
+def test_live_camera_uses_integer_source_and_same_worker(qt_app, tmp_dir, monkeypatch):
+    from orisys_autocal.ui import finger_source_panel
+
+    monkeypatch.setattr(
+        finger_source_panel, "FingerAcquisitionWorker", FakeFingerWorker
+    )
+    config = tmp_dir / "sensor.json"
+    config.write_text("{}", encoding="utf-8")
+    panel = finger_source_panel.FingerSourcePanel(
+        config_ref=str(config), source_kind="camera", camera_index=3
+    )
+    panel.start_button.click()
+    assert panel.worker.started == (3, str(config))
+    assert not panel.camera_index.isEnabled()
+    panel.stop_button.click()
+    panel._poll()
+    assert panel.camera_index.isEnabled()
+    panel.shutdown()
 
 
 def test_missing_input_is_visible_and_does_not_start_worker(qt_app, monkeypatch):