fix(levels): ScenePath must be a string, not a PackedScene

slice 7 regression. level_village_2..5.tscn each reference their own
LevelResource for the death screen label, so pointing the resource back
at the scene forms a cycle Godot cannot resolve - "Parse Error: Busy"
and the level fails to load entirely.

ScenePath was a string for exactly this reason. Reverted, and the rot it
allowed (forest_1 aimed at a nonexistent scene) is now caught by
LevelCatalogue.Validate checking every path resolves, plus a repo-level
structural check - fixed by validation rather than by typing.

project.godot: restores the C# feature flag and dialogue_manager
uses_dotnet, which `godot --headless --import` strips on every run.

project.godot

@@ -23,7 +23,7 @@ config/version="in-dev"
 run/main_scene="uid://cl00e2ocomk3m"
 config/use_custom_user_dir=true
 config/custom_user_dir_name="MrBrickAdventures"
-config/features=PackedStringArray("4.6", "C#", "GL Compatibility")
+config/features=PackedStringArray("4.7", "C#", "GL Compatibility")
 run/max_fps=180
 boot_splash/bg_color=Color(0, 0, 0, 1)
 boot_splash/show_image=false

resources/levels/forest/forest_1.tres

@@ -1,11 +1,10 @@
-[gd_resource type="Resource" script_class="LevelResource" load_steps=3 format=3 uid="uid://dsq0y2iw7tfmk"]
+[gd_resource type="Resource" script_class="LevelResource" load_steps=2 format=3 uid="uid://dsq0y2iw7tfmk"]
 
 [ext_resource type="Script" uid="uid://c2h0pqhxiqswe" path="res://scripts/Resources/LevelResource.cs" id="1_script"]
-[ext_resource type="PackedScene" uid="uid://cq4glvuewsno5" path="res://scenes/level_forest_1.tscn" id="2_scene"]
 
 [resource]
 script = ExtResource("1_script")
 Id = "forest_1"
 LevelName = "LEVEL_FOREST_1_NAME"
-Scene = ExtResource("2_scene")
+ScenePath = "res://scenes/level_forest_1.tscn"
 metadata/_custom_type_script = "uid://cp68km8bykymb"

resources/levels/level_catalogue.tres

@@ -1,6 +1,6 @@
 [gd_resource type="Resource" script_class="LevelCatalogue" load_steps=8 format=3]
 
-[ext_resource type="Script" path="res://scripts/Resources/LevelCatalogue.cs" id="1_script"]
+[ext_resource type="Script" uid="uid://cxryfiktqs7s1" path="res://scripts/Resources/LevelCatalogue.cs" id="1_script"]
 [ext_resource type="Resource" path="res://resources/levels/tutorial_1.tres" id="2_tutorial_1"]
 [ext_resource type="Resource" uid="uid://cqtalsov2bkpo" path="res://resources/levels/village/village_1.tres" id="3_village_1"]
 [ext_resource type="Resource" uid="uid://dlwkbjw1l33uq" path="res://resources/levels/village/village_2.tres" id="4_village_2"]

resources/levels/tutorial_1.tres

@@ -1,11 +1,10 @@
-[gd_resource type="Resource" script_class="LevelResource" load_steps=3 format=3]
+[gd_resource type="Resource" script_class="LevelResource" load_steps=2 format=3]
 
 [ext_resource type="Script" uid="uid://c2h0pqhxiqswe" path="res://scripts/Resources/LevelResource.cs" id="1_script"]
-[ext_resource type="PackedScene" uid="uid://dwr3avefuwnpy" path="res://scenes/level_tutorial_1.tscn" id="2_scene"]
 
 [resource]
 script = ExtResource("1_script")
 Id = "tutorial_1"
 LevelName = "LEVEL_TUTORIAL_1_NAME"
-Scene = ExtResource("2_scene")
+ScenePath = "res://scenes/level_tutorial_1.tscn"
 metadata/_custom_type_script = "uid://cp68km8bykymb"

resources/levels/village/village_1.tres

@@ -1,11 +1,10 @@
-[gd_resource type="Resource" script_class="LevelResource" load_steps=3 format=3 uid="uid://cqtalsov2bkpo"]
+[gd_resource type="Resource" script_class="LevelResource" load_steps=2 format=3 uid="uid://cqtalsov2bkpo"]
 
 [ext_resource type="Script" uid="uid://c2h0pqhxiqswe" path="res://scripts/Resources/LevelResource.cs" id="1_script"]
-[ext_resource type="PackedScene" uid="uid://bol7g83v2accs" path="res://scenes/level_village_1.tscn" id="2_scene"]
 
 [resource]
 script = ExtResource("1_script")
 Id = "village_1"
 LevelName = "LEVEL_1_NAME"
-Scene = ExtResource("2_scene")
+ScenePath = "res://scenes/level_village_1.tscn"
 metadata/_custom_type_script = "uid://cp68km8bykymb"

resources/levels/village/village_2.tres

@@ -1,11 +1,10 @@
-[gd_resource type="Resource" script_class="LevelResource" load_steps=3 format=3 uid="uid://dlwkbjw1l33uq"]
+[gd_resource type="Resource" script_class="LevelResource" load_steps=2 format=3 uid="uid://dlwkbjw1l33uq"]
 
 [ext_resource type="Script" uid="uid://c2h0pqhxiqswe" path="res://scripts/Resources/LevelResource.cs" id="1_script"]
-[ext_resource type="PackedScene" uid="uid://chqb11pfoqmeb" path="res://scenes/level_village_2.tscn" id="2_scene"]
 
 [resource]
 script = ExtResource("1_script")
 Id = "village_2"
 LevelName = "LEVEL_2_NAME"
-Scene = ExtResource("2_scene")
+ScenePath = "res://scenes/level_village_2.tscn"
 metadata/_custom_type_script = "uid://cp68km8bykymb"

resources/levels/village/village_3.tres

@@ -1,11 +1,10 @@
-[gd_resource type="Resource" script_class="LevelResource" load_steps=3 format=3 uid="uid://b63u5qfp8p7pv"]
+[gd_resource type="Resource" script_class="LevelResource" load_steps=2 format=3 uid="uid://b63u5qfp8p7pv"]
 
 [ext_resource type="Script" uid="uid://c2h0pqhxiqswe" path="res://scripts/Resources/LevelResource.cs" id="1_script"]
-[ext_resource type="PackedScene" uid="uid://h60obxmju6mo" path="res://scenes/level_village_3.tscn" id="2_scene"]
 
 [resource]
 script = ExtResource("1_script")
 Id = "village_3"
 LevelName = "LEVEL_3_NAME"
-Scene = ExtResource("2_scene")
+ScenePath = "res://scenes/level_village_3.tscn"
 metadata/_custom_type_script = "uid://cp68km8bykymb"

resources/levels/village/village_4.tres

@@ -1,11 +1,10 @@
-[gd_resource type="Resource" script_class="LevelResource" load_steps=3 format=3 uid="uid://cxfei28yu3buh"]
+[gd_resource type="Resource" script_class="LevelResource" load_steps=2 format=3 uid="uid://cxfei28yu3buh"]
 
 [ext_resource type="Script" uid="uid://c2h0pqhxiqswe" path="res://scripts/Resources/LevelResource.cs" id="1_script"]
-[ext_resource type="PackedScene" uid="uid://bhad760x3vvco" path="res://scenes/level_village_4.tscn" id="2_scene"]
 
 [resource]
 script = ExtResource("1_script")
 Id = "village_4"
 LevelName = "LEVEL_4_NAME"
-Scene = ExtResource("2_scene")
+ScenePath = "res://scenes/level_village_4.tscn"
 metadata/_custom_type_script = "uid://cp68km8bykymb"

resources/levels/village/village_5.tres

@@ -1,11 +1,10 @@
-[gd_resource type="Resource" script_class="LevelResource" load_steps=3 format=3 uid="uid://qld841xv5ui0"]
+[gd_resource type="Resource" script_class="LevelResource" load_steps=2 format=3 uid="uid://qld841xv5ui0"]
 
 [ext_resource type="Script" uid="uid://c2h0pqhxiqswe" path="res://scripts/Resources/LevelResource.cs" id="1_script"]
-[ext_resource type="PackedScene" uid="uid://bbwef3n2gjkt8" path="res://scenes/level_village_5.tscn" id="2_scene"]
 
 [resource]
 script = ExtResource("1_script")
 Id = "village_5"
 LevelName = "LEVEL_5_NAME"
-Scene = ExtResource("2_scene")
+ScenePath = "res://scenes/level_village_5.tscn"
 metadata/_custom_type_script = "uid://cp68km8bykymb"

resources/levels/village/village_6.tres

@@ -1,11 +1,10 @@
-[gd_resource type="Resource" script_class="LevelResource" load_steps=3 format=3]
+[gd_resource type="Resource" script_class="LevelResource" load_steps=2 format=3]
 
 [ext_resource type="Script" uid="uid://c2h0pqhxiqswe" path="res://scripts/Resources/LevelResource.cs" id="1_script"]
-[ext_resource type="PackedScene" uid="uid://dqekccjkwev4y" path="res://scenes/level_village_6.tscn" id="2_scene"]
 
 [resource]
 script = ExtResource("1_script")
 Id = "village_6"
 LevelName = "LEVEL_6_NAME"
-Scene = ExtResource("2_scene")
+ScenePath = "res://scenes/level_village_6.tscn"
 metadata/_custom_type_script = "uid://cp68km8bykymb"

scripts/Resources/LevelCatalogue.cs

@@ -27,8 +27,8 @@ public partial class LevelCatalogue : Resource
 
     /// <summary>
     /// The ordering the domain works from. Throws if the authored data is inconsistent — a blank or
-    /// duplicated id cannot produce a <see cref="Campaign"/>, so a mistake here fails at boot rather
+    /// duplicated id cannot produce a <see cref="Campaign"/>, so a mistake fails at boot rather than
-    /// than corrupting a save later.
+    /// corrupting a save later.
     /// </summary>
     public Campaign ToCampaign()
     {
@@ -36,19 +36,48 @@ public partial class LevelCatalogue : Resource
 
         for (var i = 0; i < Levels.Count; i++)
         {
-            var level = Levels[i];
+            if (Levels[i] == null)
-            if (level == null)
+                throw new System.InvalidOperationException($"LevelCatalogue has an empty slot at index {i}.");
-                throw new System.InvalidOperationException(
-                    $"LevelCatalogue has an empty slot at index {i}.");
 
-            ids.Add(LevelId.Of(level.Id));
+            ids.Add(LevelId.Of(Levels[i].Id));
         }
 
         return Campaign.Of(ids);
     }
 
+    /// <summary>
+    /// Checks every catalogued Level names a scene that actually exists, returning the problems found.
+    /// </summary>
+    /// <remarks>
+    /// This is what keeps <see cref="LevelResource.ScenePath"/> honest. The path cannot be a typed
+    /// <c>PackedScene</c> — several level scenes reference their own LevelResource, so a reference back
+    /// to the scene is a cycle Godot reports as "Parse Error: Busy" and the level fails to load. A
+    /// string plus this check gets the safety without the cycle.
+    /// </remarks>
+    public IReadOnlyList<string> Validate()
+    {
+        var problems = new List<string>();
+
+        foreach (var level in Levels.Where(l => l != null))
+        {
+            if (string.IsNullOrWhiteSpace(level.ScenePath))
+                problems.Add($"level '{level.Id}' has no scene path");
+            else if (!ResourceLoader.Exists(level.ScenePath))
+                problems.Add($"level '{level.Id}' points at '{level.ScenePath}', which does not exist");
+        }
+
+        return problems;
+    }
+
     public LevelResource Find(LevelId id) =>
         Levels.FirstOrDefault(level => level != null && level.Id == id.Value);
 
-    public PackedScene SceneFor(LevelId id) => Find(id)?.Scene;
+    /// <summary>Loads a Level's scene on demand. Null when the Level is not catalogued.</summary>
+    public PackedScene SceneFor(LevelId id)
+    {
+        var path = Find(id)?.ScenePath;
+        return string.IsNullOrWhiteSpace(path) ? null : ResourceLoader.Load<PackedScene>(path);
+    }
+
+    public string DisplayNameKeyFor(LevelId id) => Find(id)?.LevelName ?? string.Empty;
 }

scripts/Resources/LevelResource.cs

@@ -3,19 +3,25 @@ using Godot;
 namespace Mr.BrickAdventures.scripts.Resources;
 
 /// <summary>
-/// One authored Level: its stable id, its display name key, and the scene to load.
+/// One authored Level: its stable id, its display name key, and where its scene lives.
 /// </summary>
 /// <remarks>
 /// <para>
 /// <see cref="Id"/> is what Playthroughs and Best Times reference, so it must never change once a
-/// build has shipped — unlike position in a list, which is what the old
+/// build has shipped — unlike position in a list, which is what the old <c>GameManager.LevelScenes</c>
-/// <c>GameManager.LevelScenes</c> array used and which every save depended on.
+/// array used and which every save depended on.
 /// </para>
 /// <para>
-/// The scene is a <see cref="PackedScene"/> rather than a path string. The previous
+/// <see cref="ScenePath"/> is deliberately a path string and not an exported <c>PackedScene</c>.
-/// <c>ScenePath</c> field was never read by anything and had rotted: <c>forest_1.tres</c> pointed at
+/// Several level scenes reference their own <c>LevelResource</c> (for the death screen's label), so a
-/// <c>res://scenes/level_forest_5.tscn</c>, which does not exist. An exported reference is tracked by
+/// typed reference back to the scene forms a cycle that Godot cannot resolve — it fails with
-/// the editor and cannot drift.
+/// "Parse Error: Busy" and the level will not load at all.
+/// </para>
+/// <para>
+/// The trade-off is that a path can rot: this field previously pointed at
+/// <c>res://scenes/level_forest_5.tscn</c>, which does not exist. That is fixed by validation rather
+/// than by typing — <c>LevelCatalogue.Validate</c> checks every path resolves, so a bad one fails
+/// loudly at boot instead of silently.
 /// </para>
 /// </remarks>
 [GlobalClass]
@@ -29,6 +35,10 @@ public partial class LevelResource : Resource
     [Export]
     public string LevelName { get; set; } = string.Empty;
 
-    [Export]
+    /// <summary>
-    public PackedScene Scene { get; set; }
+    /// <c>res://</c> or <c>uid://</c> path to the scene. Loaded on demand, never held as a typed
+    /// reference — see the remarks above.
+    /// </summary>
+    [Export(PropertyHint.File, "*.tscn")]
+    public string ScenePath { get; set; } = string.Empty;
 }