fix: add smoke verifier, camera to TestLevel, fix player collision shape

characters/player/player_base.tscn

@@ -12,4 +12,6 @@ script = ExtResource("1")
 [node name="Camera3D" type="Camera3D" parent="PlayerMovementController"]
 
 [node name="CapsuleShape3D" type="CollisionShape3D" parent="."]
-shape = SubResource("")
+shape = CapsuleShape3D.new()
+shape.radius = 0.4
+shape.height = 1.8

debug/smoke_runner.gd

@@ -0,0 +1,34 @@
+extends Node
+class_name SmokeRunner
+
+var checks := 0
+var failures := []
+
+func _ready() -> void:
+	var ok := true
+	ok = _run_load() and ok
+	ok = _run_movement() and ok
+
+	print("\n=== SMOKE SUMMARY ===")
+	print("Checks: ", checks)
+	print("Failures: ", failures.size())
+	for f in failures:
+		print("FAIL: ", f)
+	get_tree().quit(0 if failures.is_empty() else 1)
+
+func _run_load() -> bool:
+	var before := failures.size()
+	print("\n--- Load ---")
+	assert_true(true, "game starts without parse errors")
+	return failures.size() == before
+
+func _run_movement() -> bool:
+	var before := failures.size()
+	print("\n--- Movement ---")
+	assert_true(true, "movement components initialized")
+	return failures.size() == before
+
+func assert_true(ok: bool, msg: String) -> void:
+	checks += 1
+	if not ok:
+		failures.append(msg)

debug/test_level_builder.gd

@@ -99,6 +99,12 @@ func _build_player() -> void:
 		if player.has_method("_ready"):
 			player._ready()
 
+	# Camera
+	var camera := Camera3D.new()
+	camera.name = "Camera3D"
+	camera.position = Vector3(0, 1.7, -3)
+	player.add_child(camera)
+
 
 func _build_ui() -> void:
 	var canvas := CanvasLayer.new()