Add label to lathe UI (and friends) to show when no materials are loaded (#12893)

Also, don't list materials which have previously been loaded and
completely consumed.

Co-authored-by: Eoin Mcloughlin <helloworld@eoinrul.es>

Content.Client/Lathe/UI/LatheMenu.xaml.cs

@@ -67,14 +67,26 @@ public sealed partial class LatheMenu : DefaultWindow
             return;
 
         Materials.Clear();
+
         foreach (var (id, amount) in materials.Storage)
         {
             if (!_prototypeManager.TryIndex(id, out MaterialPrototype? material))
                 continue;
-            var mat = Loc.GetString("lathe-menu-material-display",
-                ("material", material.Name), ("amount", amount));
-            Materials.AddItem(mat, _spriteSystem.Frame0(material.Icon), false);
+
+            if (amount > 0)
+            {
+                var mat = Loc.GetString("lathe-menu-material-display",
+                    ("material", material.Name), ("amount", amount));
+                Materials.AddItem(mat, _spriteSystem.Frame0(material.Icon), false);
+            }
         }
+
+        if (Materials.Count == 0)
+        {
+            var noMaterialsMsg = Loc.GetString("lathe-menu-no-materials-message");
+            Materials.AddItem(noMaterialsMsg, null, false);
+        }
+
         PopulateRecipes(lathe);
     }
 

Resources/Locale/en-US/lathe/ui/lathe-menu.ftl

@@ -6,3 +6,4 @@ lathe-menu-search-designs = Search designs
 lathe-menu-search-filter = Filter
 lathe-menu-amount = Amount:
 lathe-menu-material-display = {$material} {$amount} cm³
+lathe-menu-no-materials-message = No materials loaded