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, 13 insertions, 1 deletions

diff --git a/core/profile.py b/core/profile.py
index fdd3a48..39cb3ca 100644
--- a/core/profile.py
+++ b/core/profile.py
@@ -131,6 +131,18 @@ class ProfileManager:
         ProfileManager.apply(profile, registry, processor, ...)
     """
 
+    # Plugin device factories registered at runtime (device_type → class)
+    _extra_factories: dict = {}
+
+    @staticmethod
+    def register_device_factory(device_type: str, factory):
+        """Register a plugin device class so it can be restored from profiles."""
+        ProfileManager._extra_factories[device_type] = factory
+
+    @staticmethod
+    def unregister_device_factory(device_type: str):
+        ProfileManager._extra_factories.pop(device_type, None)
+
     # ── Capture ──────────────────────────────────────────────────────────────
 
     @staticmethod
@@ -234,7 +246,7 @@ class ProfileManager:
         )
 
         # ── Devices ──────────────────────────────────────────────────────
-        _DEVICE_FACTORIES = {}
+        _DEVICE_FACTORIES = dict(ProfileManager._extra_factories)
         try:
             from devices.arduino_device import ArduinoDevice
             _DEVICE_FACTORIES["arduino"] = ArduinoDevice