refactor(runtime): own magic and player state

Move the coupled Spellbook and LocalPlayerState into one Runtime-owned character graph, route content, live-session, retained UI, reset, and shutdown through that exact owner, and delete the duplicate desired-component snapshot from inventory state. Preserve synchronous retail update and reset ordering while adding independent-instance and retryable-failure coverage.

Co-authored-by: Codex <codex@openai.com>

tests/AcDream.App.Tests/Runtime/RuntimeCharacterOwnershipTests.cs

@@ -0,0 +1,106 @@
+namespace AcDream.App.Tests.Runtime;
+
+public sealed class RuntimeCharacterOwnershipTests
+{
+    [Fact]
+    public void ProductionConstructsOnlyTheRuntimeCharacterOwner()
+    {
+        string source = ReadSource("Rendering", "GameWindow.cs");
+
+        Assert.Contains(
+            "_runtimeCharacter = new RuntimeCharacterState();",
+            source,
+            StringComparison.Ordinal);
+        Assert.DoesNotContain(
+            "new AcDream.Core.Spells.Spellbook",
+            source,
+            StringComparison.Ordinal);
+        Assert.DoesNotContain(
+            "new AcDream.Core.Player.LocalPlayerState",
+            source,
+            StringComparison.Ordinal);
+        Assert.Contains(
+            "SpellBook =>\n        _runtimeCharacter.Spellbook;",
+            Normalize(source),
+            StringComparison.Ordinal);
+        Assert.Contains(
+            "LocalPlayer =>\n        _runtimeCharacter.LocalPlayer;",
+            Normalize(source),
+            StringComparison.Ordinal);
+    }
+
+    [Fact]
+    public void SessionRoutingAndShutdownBorrowTheExactRuntimeOwner()
+    {
+        string session = ReadSource("Net", "LiveSessionRuntimeFactory.cs");
+        string router = ReadRuntimeSource(
+            "Session",
+            "LiveSessionEventRouter.cs");
+        string content = ReadSource(
+            "Composition",
+            "ContentEffectsAudioComposition.cs");
+        string ui = ReadSource(
+            "Composition",
+            "InteractionRetainedUiComposition.cs");
+        string inventory = ReadRuntimeSource(
+            "Gameplay",
+            "RuntimeInventoryState.cs");
+        string shutdown = ReadSource("Rendering", "GameWindowLifetime.cs");
+
+        Assert.Contains(
+            "RuntimeCharacterState Character",
+            session,
+            StringComparison.Ordinal);
+        Assert.Contains(
+            "character.Character.Spellbook",
+            router,
+            StringComparison.Ordinal);
+        Assert.Contains(
+            "character.Character.LocalPlayer",
+            router,
+            StringComparison.Ordinal);
+        Assert.Contains(
+            "_factory.InstallSpellMetadata(_dependencies.Character, magic)",
+            content,
+            StringComparison.Ordinal);
+        Assert.Contains(
+            "d.Character.Spellbook",
+            ui,
+            StringComparison.Ordinal);
+        Assert.Contains(
+            "d.Character.LocalPlayer",
+            ui,
+            StringComparison.Ordinal);
+        Assert.DoesNotContain(
+            "DesiredComponentState",
+            inventory,
+            StringComparison.Ordinal);
+        Assert.Contains(
+            "\"runtime character state\"",
+            shutdown,
+            StringComparison.Ordinal);
+    }
+
+    private static string ReadSource(params string[] relative) =>
+        File.ReadAllText(Path.Combine(
+            [FindRepositoryRoot(), "src", "AcDream.App", .. relative]));
+
+    private static string ReadRuntimeSource(params string[] relative) =>
+        File.ReadAllText(Path.Combine(
+            [FindRepositoryRoot(), "src", "AcDream.Runtime", .. relative]));
+
+    private static string Normalize(string source) =>
+        source.Replace("\r\n", "\n", StringComparison.Ordinal);
+
+    private static string FindRepositoryRoot()
+    {
+        var current = new DirectoryInfo(AppContext.BaseDirectory);
+        while (current is not null)
+        {
+            if (File.Exists(Path.Combine(current.FullName, "AcDream.slnx")))
+                return current.FullName;
+            current = current.Parent;
+        }
+        throw new DirectoryNotFoundException("AcDream.slnx was not found.");
+    }
+}

tests/AcDream.App.Tests/Runtime/RuntimeInventoryOwnershipTests.cs

@@ -27,6 +27,10 @@ public sealed class RuntimeInventoryOwnershipTests
             "new AcDream.Core.Items.ExternalContainerState",
             source,
             StringComparison.Ordinal);
+        Assert.DoesNotContain(
+            "DesiredComponentState",
+            source,
+            StringComparison.Ordinal);
     }
 
     [Fact]
@@ -50,8 +54,8 @@ public sealed class RuntimeInventoryOwnershipTests
             "_domain.Inventory.Transactions.CompleteUse(error)",
             session,
             StringComparison.Ordinal);
-        Assert.Contains(
-            "OnDesiredComponents: _domain.Inventory.DesiredComponents.Replace",
+        Assert.DoesNotContain(
+            "_domain.Inventory.DesiredComponents",
             session,
             StringComparison.Ordinal);
         AssertAppearsInOrder(