fix(miku): correct scale + animation playback

- Fixed Blender export: remove FBX armature modifier before scaling,
  then transform_apply(scale=True) before creating new armature
- Model now exports at correct 1.8 unit height (verified in Blender)
- SkinnedPlayerModel now polls MovementStateMachine in _process
  to drive animations based on movement state
- Player 1 gets Miku at origin, others get procedural humanoid at y=-0.9

editor/import_miku.gd

@@ -0,0 +1,33 @@
+@tool
+extends EditorScript
+
+func _run():
+	var source = "res://assets/characters/skins/miku_rigged_final.glb"
+	var dest = "res://assets/characters/skins/miku_rigged_imported.tscn"
+	
+	print("Loading %s..." % source)
+	var glb = load(source)
+	if not glb:
+		print("ERROR: Failed to load GLB")
+		return
+	
+	print("Instantiating...")
+	var scene = glb.instantiate()
+	if not scene:
+		print("ERROR: Failed to instantiate")
+		return
+	
+	print("Scene: %s" % scene.name)
+	print("Children:")
+	for child in scene.get_children():
+		print("  %s (%s)" % [child.name, child.get_class()])
+		if child is Skeleton3D:
+			print("    Bones: %d" % child.get_bone_count())
+		if child is AnimationPlayer:
+			print("    Animations: %s" % child.get_animation_list())
+	
+	# Save as scene
+	var packed = PackedScene.new()
+	packed.pack(scene)
+	ResourceSaver.save(packed, dest)
+	print("Saved to %s" % dest)