Implement playable Mac client and rendering validation

extension/src/metin2_model.h

@@ -130,6 +130,7 @@ public:
 	// Deformed mesh bounds in this node's local GR2 coordinate frame.  Unlike
 	// MeshInstance3D::get_aabb(), this follows the GPU shader pose as well.
 	godot::AABB get_visual_aabb();
+	godot::Dictionary get_fly_target_bounds();
 	// Parent-space Y adjustment that places the bind-pose model's lowest point
 	// on the actor origin. GR2 is Z-up/cm; this is converted to Godot Y/metres.
 	double get_ground_offset() const { return ground_offset; }
@@ -187,6 +188,7 @@ private:
 	godot::Ref<godot::ImageTexture> hair_tex;            // resolved hair albedo (for GPU path)
 	int gpu_base_surf = 0;                               // base surfaces before appended GPU hair
 	void _load_hair();
+	void _refresh_hair_mesh();
 	void _build_gpu_mesh(); // base + remapped hair surfaces -> mi->mesh (GPU-skin path, §2.2)
 
 	godot::String weapon_gr2;                              // attached weapon .gr2 (or "")
@@ -244,6 +246,9 @@ private:
 	bool gpu_visual_bounds_ready = false;
 	bool have_visual_bounds = false;
 	godot::AABB visual_bounds;
+	std::vector<gr2::Mat4> current_world_pose;
+	godot::AABB fly_target_bounds;
+	bool fly_target_bounds_valid = false;
 	std::vector<gr2::Mat4> current_skin;
 	godot::Ref<godot::Image> bones_img;      // RGBAF 3 x bone_count
 	godot::Ref<godot::ImageTexture> bones_tex;