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

src/pygui/backend/controllers/session_controller.py

@@ -40,8 +40,10 @@ class SessionController(QObject):
     liveStatsChanged = Signal()  # emitted when receivedCount or errorCount change
     # trend: per-frame avg for live graph
     trendData = Signal(str)  # JSON array of floats
-    comparisonResult = Signal(object)  # dict with success, distance, warping_path, max_sensor_deviation, series_a, series_b
-    splitResult = Signal(object)  # dict with success, segments
+    # NOTE: dict (QVariantMap), not object — Signal(object) delivers Python
+    # dicts to QML as an opaque empty wrapper with no accessible fields.
+    comparisonResult = Signal(dict)  # dict with success, distance, warping_path, max_sensor_deviation, series_a, series_b
+    splitResult = Signal(dict)  # dict with success, segments
     # private: marshal a worker-thread frame onto the main thread
     _liveFrame = Signal(object)    # Frame
     _liveError = Signal()          # worker-thread error ping
@@ -357,10 +359,11 @@ class SessionController(QObject):
 
             result = compare_runs(series_a, series_b)
 
-            # Mean temporal shif along the DTW path: positive means run B
-            # reaches the same profile features lather than run A.
+            # Mean temporal shift along the DTW path: positive means run B
+            # reaches the same profile features later than run A.
             path = result["warping_path"]
             frame_offset = round(sum(j - i for i, j in path) / len(path)) if path else 0
+
             # Max sensor deviation: walk the DTW-aligned frame pairs and take
             # the largest per-sensor abs difference across all sensors, not
             # just the sensor[0] series used for alignment.
@@ -422,7 +425,8 @@ class SessionController(QObject):
             self.comparisonResult.emit({
                 "success": True,
                 "distance": result["distance"],
-                "warping_path": result["warping_path"][:50],  # limit path size
+                # Lists, not tuples — tuples don't survive QVariant conversion
+                "warping_path": [list(p) for p in result["warping_path"][:50]],
                 "frame_offset": frame_offset,
                 "max_sensor_deviation": max_sensor_deviation,
                 "series_a": series_a,
@@ -709,6 +713,9 @@ class SessionController(QObject):
                 self._trend_timestamps.pop(0)
                 self._trend_buffer.pop(0)
 
+
+
+
     def _flush_repaint(self) -> None:
         if not self._dirty:
             return