fix: comparison results never reached QML; restore click-box run selection

tests/test_session_controller.py

@@ -64,7 +64,42 @@ def test_compare_files_integration(controller):
     assert "series_a" in args
     assert "series_b" in args
     assert args["frame_offset"] == 0
-    
+
+def test_comparison_result_reaches_qml(qapp, controller):
+    """The result dict must arrive in QML as a real JS object with fields.
+
+    Signal(object) delivers Python dicts to QML as an opaque empty wrapper;
+    the signal must be declared with a dict/QVariantMap signature.
+    """
+    from PySide6.QtQml import QQmlApplicationEngine
+
+    engine = QQmlApplicationEngine()
+    engine.rootContext().setContextProperty("streamController", controller)
+    engine.loadData(b"""
+import QtQuick
+Item {
+    id: probe
+    property bool gotSuccess: false
+    property real gotDistance: -1
+    Connections {
+        target: streamController
+        function onComparisonResult(result) {
+            probe.gotSuccess = result.success === true
+            probe.gotDistance = result.distance !== undefined ? result.distance : -1
+        }
+    }
+}
+""")
+    assert engine.rootObjects(), "probe QML failed to load"
+    root = engine.rootObjects()[0]
+
+    csv_path = "tests/fixtures/sample_stream.csv"
+    controller.compareFiles(csv_path, csv_path)
+    qapp.processEvents()
+
+    assert root.property("gotSuccess") is True
+    assert root.property("gotDistance") >= 0
+
 def test_recording_toggle(controller, tmp_path):
     csv_path = str(tmp_path / "rec" / "live_test.csv")
     controller.startRecording(csv_path, "SN123")