fix: rewrite TestLevelBuilder with parse-safe InputMap bootstrapping

debug/test_level_builder.gd

@@ -1,5 +1,6 @@
 extends Node3D
 class_name TestLevelBuilder
+
 ## Builds the test level ONLY from code — no .tscn SubResource references.
 ## One-click playtest: attach to TestLevel root, F5.
 func _ready() -> void:
@@ -16,6 +17,22 @@ func build() -> void:
 
 
 func _box_static(pos: Vector3, size: Vector3, color: Color) -> StaticBody3D:
+	var body := StaticBody3D.new()
+	body.name = "Static_" + str(pos)
+	body.position = pos
+	add_child(body)
+	var shape := CollisionShape3D.new()
+	shape.shape = BoxShape3D.new()
+	shape.shape.size = size
+	body.add_child(shape)
+	var mesh := MeshInstance3D.new()
+	mesh.mesh = BoxMesh.new()
+	mesh.mesh.size = size
+	var mat := StandardMaterial3D.new()
+	mat.albedo_color = color
+	mesh.mesh.surface_set_material(0, mat)
+	body.add_child(mesh)
+	return body
 
 
 func _build_input_map() -> void:
@@ -51,22 +68,6 @@ func _build_input_map() -> void:
 				events.append(ev)
 		for ev in events:
 			InputMap.action_add_event(action, ev)
-	var body := StaticBody3D.new()
-	body.name = "Static_" + str(pos)
-	body.position = pos
-	add_child(body)
-	var shape := CollisionShape3D.new()
-	shape.shape = BoxShape3D.new()
-	shape.shape.size = size
-	body.add_child(shape)
-	var mesh := MeshInstance3D.new()
-	mesh.mesh = BoxMesh.new()
-	mesh.mesh.size = size
-	var mat := StandardMaterial3D.new()
-	mat.albedo_color = color
-	mesh.mesh.surface_set_material(0, mat)
-	body.add_child(mesh)
-	return body
 
 
 func _build_floor() -> void:
@@ -105,7 +106,6 @@ func _build_player() -> void:
 	if mover_script:
 		player.set_script(mover_script)
 
-	# State machine
 	var sm := Node.new()
 	sm.name = "MovementStateMachine"
 	player.add_child(sm)
@@ -114,7 +114,6 @@ func _build_player() -> void:
 	if sm_script:
 		sm.set_script(sm_script)
 
-	# State children
 	var state_scripts := {
 		"ground": "res://movement/states/state_ground.gd",
 		"air": "res://movement/states/state_air.gd",
@@ -131,7 +130,6 @@ func _build_player() -> void:
 		if st_script:
 			st.set_script(st_script)
 
-	# Camera
 	var camera := Camera3D.new()
 	camera.name = "Camera3D"
 	camera.position = Vector3(0, 1.7, -3)