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, 28 insertions, 5 deletions

diff --git a/plugins/motion_capture/plugin.py b/plugins/motion_capture/plugin.py
index 0b44cb4..9cf9557 100644
--- a/plugins/motion_capture/plugin.py
+++ b/plugins/motion_capture/plugin.py
@@ -49,12 +49,16 @@ class MotionCapturePlugin(LabPlugin):
     # ── Lifecycle ─────────────────────────────────────────────────────────
 
     def on_load(self, context: PluginContext) -> None:
-        self._ctx     = context
-        self._btn     = None          # toolbar button reference
-        self._windows: dict = {}      # device_id → MotionCaptureWindow
+        self._ctx          = context
+        self._btn          = None     # toolbar button reference
+        self._windows: dict      = {}  # device_id → MotionCaptureWindow
+        self._window_state: dict = {}  # device_id → {px_per_mm, camera_idx}
         from ui.add_device_dialog import _PANELS
         from camera_panel import CameraPanel
         _PANELS["Camera"] = (CameraPanel, "cam")
+        from core.profile import ProfileManager
+        from device import CameraDevice
+        ProfileManager.register_device_factory(CameraDevice.DEVICE_TYPE, CameraDevice)
 
     def on_unload(self) -> None:
         for win in list(self._windows.values()):
@@ -62,6 +66,9 @@ class MotionCapturePlugin(LabPlugin):
         self._windows.clear()
         from ui.add_device_dialog import _PANELS
         _PANELS.pop("Camera", None)
+        from core.profile import ProfileManager
+        from device import CameraDevice
+        ProfileManager.unregister_device_factory(CameraDevice.DEVICE_TYPE)
 
     # ── Integration hooks ─────────────────────────────────────────────────
 
@@ -133,11 +140,27 @@ class MotionCapturePlugin(LabPlugin):
                 self._btn.setChecked(False)
             return
         win = MotionCaptureWindow(device._tracker)
-        win.closed.connect(lambda: self._close_window(dev_id))
+
+        # Restore mode/shape from live tracker state
+        win.restore_ui_state(
+            mode=device._tracker.track_mode,
+            shape=device._tracker.template_shape,
+        )
+        # Restore px/mm and camera index from last session
+        if dev_id in self._window_state:
+            state = self._window_state[dev_id]
+            win.set_px_per_mm(state["px_per_mm"])
+            win.set_camera_index(state["camera_idx"])
+
+        win.closed.connect(lambda d=dev_id, w=win: self._on_window_closed(d, w))
         self._windows[dev_id] = win
         win.show()
 
-    def _close_window(self, dev_id: str) -> None:
+    def _on_window_closed(self, dev_id: str, win) -> None:
+        self._window_state[dev_id] = {
+            "px_per_mm":  win.get_px_per_mm(),
+            "camera_idx": win.get_camera_index(),
+        }
         self._windows.pop(dev_id, None)
         if not self._windows and self._btn is not None:
             self._btn.setChecked(False)