ksys: small declaration fixes

setCamera's only caller passes the camera actor, a ksys::act::Actor;
ksys::act::Camera is only forward-declared.

(AI assisted using Claude Fable 5.1 and Claude Opus 5.5)

src/KingSystem/ActorSystem/actActorCaptureMgr.cpp

@@ -30,7 +30,7 @@ void ActorCaptureMgr::init(const InitArg& arg) {
     mDummyFile.load("Actor/ActorCapture/Dummy.bactcapt", &req);
 }
 
-void ActorCaptureMgr::setCamera(Camera* camera) {
+void ActorCaptureMgr::setCamera(Actor* camera) {
     if (camera)
         mCamera = camera;
 }