Motion capture: profile support, FPS config, persistent tracking, window state

Profile integration:
- CameraDevice.get_save_config() serialises camera_index, simulate,
  resolution, fps — cameras now persist in .labdaq profiles
- ProfileManager.register/unregister_device_factory() lets plugins
  register their device classes for profile restoration without
  core → plugin dependency
- MotionCapturePlugin registers CameraDevice factory on load/unload

Camera configuration:
- Add Frame Rate combo to CameraPanel (Default/15/24/30/60/120 fps)
  defaults to 30 fps; flows through to CAP_PROP_FPS on connect
- tracker.start() accepts fps param alongside existing resolution

Tracking persistence:
- CameraTracker.is_running() — checks thread alive state
- MotionCaptureWindow initialises _connected from tracker.is_running()
  so reopening the window resumes the live feed without restarting
  the camera or losing the active tracking state

Window state:
- Plugin saves px_per_mm + camera_idx when window closes
- Reopened window restores saved values and syncs mode/shape UI
  from tracker state via restore_ui_state() (signals blocked to
  avoid resetting tracker)
- Window type changed to Qt.WindowType.Window for independent
  close button on all Linux WMs

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

1 files changed, 7 insertions, 1 deletions

diff --git a/plugins/motion_capture/tracker.py b/plugins/motion_capture/tracker.py
index ffc9f25..8dc89f1 100644
--- a/plugins/motion_capture/tracker.py
+++ b/plugins/motion_capture/tracker.py
@@ -128,7 +128,8 @@ class CameraTracker:
     # ── Start / stop ──────────────────────────────────────────────────────
 
     def start(self, camera_index: int = 0,
-              resolution: Optional[Tuple[int, int]] = None) -> bool:
+              resolution: Optional[Tuple[int, int]] = None,
+              fps: Optional[int] = None) -> bool:
         self.stop()
         self._running = True
 
@@ -145,6 +146,8 @@ class CameraTracker:
             if resolution:
                 cap.set(cv2.CAP_PROP_FRAME_WIDTH,  resolution[0])
                 cap.set(cv2.CAP_PROP_FRAME_HEIGHT, resolution[1])
+            if fps:
+                cap.set(cv2.CAP_PROP_FPS, fps)
             if cap.isOpened():
                 with self._lock:
                     self._cap           = cap
@@ -271,6 +274,9 @@ class CameraTracker:
         with self._lock:
             return self._lost
 
+    def is_running(self) -> bool:
+        return self._running and self._thread is not None and self._thread.is_alive()
+
     @property
     def fps(self) -> float:
         return self._fps