Fix Fuel's field visibility, add it to the cutter

*Now* the fuel change events will work (and compile).

src/game/mod.rs

@@ -33,7 +33,7 @@ pub mod consumables {
   use bevy::prelude::*;
 
   #[derive(Component)]
-  pub struct Fuel(u32);
+  pub struct Fuel(pub u32);
 
   #[derive(Event)]
   pub struct FuelChanged;

src/main.rs

@@ -2,7 +2,10 @@ use bevy::{color::palettes::css::*, prelude::*, window::WindowResolution};
 use bevy_inspector_egui::{bevy_egui::EguiPlugin, quick::WorldInspectorPlugin};
 
 use crate::{
-  game::machines::{CuttingMachine, FlippingMachine, RotatingMachine, TransposingMachine},
+  game::{
+    consumables::Fuel,
+    machines::{CuttingMachine, FlippingMachine, RotatingMachine, TransposingMachine},
+  },
   resources::UiTheme,
   widgets::SpawnUi,
 };
@@ -47,6 +50,7 @@ fn dummy_machines(mut commands: Commands) {
   commands
     .spawn((
       CuttingMachine,
+      Fuel(10),
       Sprite::from_color(RED, Vec2::splat(40.0)),
       Transform::from_translation(Vec3::new(-40.0, 40.0, 0.0)),
       Pickable::default(),

src/widgets/machines.rs

@@ -12,7 +12,7 @@ impl SpawnUi for CuttingMachine {
     commands.entity(base_entity).with_children(|commands| {
       // Left panel. For fuel or machine stats or whatever.
       // TODO: Pass along target machine, not the UI's root entity.
-      commands.spawn(FuelGauge::bundle(Entity::PLACEHOLDER));
+      commands.spawn(FuelGauge::bundle(machine_id));
 
       // Center panel (placeholder for the Card view)
       commands.spawn((