refactor(app): complete session startup composition

Move the live-session reset and routing graph, combat and diagnostic command targets, and the sole gameplay input subscriber into Phase 7 before frame publication. Add exact retryable ownership for late bindings so partial startup cannot strand session or component teardown edges.

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

tests/AcDream.App.Tests/Rendering/GameWindowSlice8BoundaryTests.cs

@@ -47,7 +47,7 @@ public sealed class GameWindowSlice8BoundaryTests
     {
         string body = MethodBody(
             "private void OnLoad()",
-            "private AcDream.App.Net.LiveSessionHost");
+            "private void OnUpdate(double dt)");
 
         AssertAppearsInOrder(
             body,
@@ -64,16 +64,29 @@ public sealed class GameWindowSlice8BoundaryTests
             "LivePresentationResult livePresentation =",
             "new LivePresentationCompositionPhase(",
             "this).Compose(",
+            "new SessionPlayerCompositionPhase(",
             "var renderFrameOrchestrator =",
             "var updateFrameOrchestrator = new AcDream.App.Update.UpdateFrameOrchestrator(",
             "_frameGraphs.Publish(updateFrameOrchestrator, renderFrameOrchestrator);",
-            "_liveSessionHost = CreateLiveSessionHost();",
-            "_liveCombatModeCommands.Bind(combatCommand);",
-            "_runtimeDiagnosticCommands.Bind(runtimeDiagnostics);",
-            "_gameplayInputActions = AcDream.App.Input.GameplayInputActionRouter.Create(",
-            "_gameplayInputActions.Attach();",
-            "_liveSessionHost.Start(_options)");
-        Assert.Equal(1, CountOccurrences(body, "_liveSessionHost.Start(_options)"));
+            "sessionPlayer.SessionHost.Start(_options)");
+
+        string sessionPhase = File.ReadAllText(Path.Combine(
+            FindRepoRoot(),
+            "src",
+            "AcDream.App",
+            "Composition",
+            "SessionPlayerComposition.cs"));
+        AssertAppearsInOrder(
+            sessionPhase,
+            "sessionRuntimeFactory.Create(liveSession)",
+            "d.CombatModeCommands.BindOwned(combatCommand)",
+            "d.RuntimeDiagnosticCommands.BindOwned(runtimeDiagnostics)",
+            "GameplayInputActionRouter.Create(",
+            "gameplayActions.Attach();",
+            "_publication.PublishSessionPlayer(result);");
+        Assert.Equal(1, CountOccurrences(
+            body,
+            "sessionPlayer.SessionHost.Start(_options)"));
         string phaseOne = Slice(
             File.ReadAllText(Path.Combine(
                 FindRepoRoot(),
@@ -93,7 +106,9 @@ public sealed class GameWindowSlice8BoundaryTests
             "if (firstKeyboard is not null && firstMouse is not null)",
             phaseOne,
             StringComparison.Ordinal);
-        int start = body.IndexOf("_liveSessionHost.Start(_options)", StringComparison.Ordinal);
+        int start = body.IndexOf(
+            "sessionPlayer.SessionHost.Start(_options)",
+            StringComparison.Ordinal);
         string postStart = body[start..];
         Assert.Contains("switch (liveStart.Status)", postStart, StringComparison.Ordinal);
         Assert.Empty(System.Text.RegularExpressions.Regex.Matches(
@@ -113,10 +128,17 @@ public sealed class GameWindowSlice8BoundaryTests
         string source = GameWindowSource();
         string load = MethodBody(
             "private void OnLoad()",
-            "private AcDream.App.Net.LiveSessionHost");
-        string sessionFactory = MethodBody(
-            "private AcDream.App.Net.LiveSessionEventRouter CreateLiveSessionEventRouter(",
-            "private AcDream.App.Net.LiveInventorySessionBindings");
+            "private void OnUpdate(double dt)");
+        string sessionFactorySource = File.ReadAllText(Path.Combine(
+            FindRepoRoot(),
+            "src",
+            "AcDream.App",
+            "Net",
+            "LiveSessionRuntimeFactory.cs"));
+        string sessionFactory = Slice(
+            sessionFactorySource,
+            "private LiveSessionEventRouter CreateEventRouter(",
+            "private LiveInventorySessionBindings CreateInventoryBindings()");
         string worldPhase = File.ReadAllText(Path.Combine(
             FindRepoRoot(),
             "src",
@@ -143,9 +165,9 @@ public sealed class GameWindowSlice8BoundaryTests
         Assert.Contains("environment.Initialize(region);", worldPhase, StringComparison.Ordinal);
         AssertAppearsInOrder(
             sessionFactory,
-            "new AcDream.App.Net.LiveEnvironmentSessionSink(",
-            "_worldEnvironment.ApplyAdminEnvirons,",
-            "_worldEnvironment.SynchronizeFromServer)");
+            "new LiveEnvironmentSessionSink(",
+            "_world.Environment.ApplyAdminEnvirons,",
+            "_world.Environment.SynchronizeFromServer)");
         Assert.DoesNotContain("_loadedSkyDesc", source, StringComparison.Ordinal);
         Assert.DoesNotContain("_loadedSkyDayIndex", source, StringComparison.Ordinal);
         Assert.DoesNotContain("private void RefreshSkyForCurrentDay()", source, StringComparison.Ordinal);
@@ -164,10 +186,16 @@ public sealed class GameWindowSlice8BoundaryTests
             "debugVm.CycleTimeOfDay = _dependencies.DiagnosticCommands.CycleTimeOfDay;",
             "debugVm.CycleWeather = _dependencies.DiagnosticCommands.CycleWeather;",
             "debugVm.ToggleCollisionWires =");
+        string sessionPhase = File.ReadAllText(Path.Combine(
+            FindRepoRoot(),
+            "src",
+            "AcDream.App",
+            "Composition",
+            "SessionPlayerComposition.cs"));
         AssertAppearsInOrder(
-            load,
-            "new AcDream.App.Diagnostics.RuntimeDiagnosticCommandController(",
-            "_runtimeDiagnosticCommands.Bind(runtimeDiagnostics);");
+            sessionPhase,
+            "new RuntimeDiagnosticCommandController(",
+            "d.RuntimeDiagnosticCommands.BindOwned(runtimeDiagnostics)");
     }
 
     [Fact]
@@ -176,7 +204,13 @@ public sealed class GameWindowSlice8BoundaryTests
         string source = GameWindowSource();
         string load = MethodBody(
             "private void OnLoad()",
-            "private AcDream.App.Net.LiveSessionHost");
+            "private void OnUpdate(double dt)");
+        string sessionPhase = File.ReadAllText(Path.Combine(
+            FindRepoRoot(),
+            "src",
+            "AcDream.App",
+            "Composition",
+            "SessionPlayerComposition.cs"));
         string shutdown = MethodBody(
             "private ResourceShutdownTransaction CreateShutdownTransaction()",
             "private void OnFocusChanged(bool focused)");
@@ -187,9 +221,11 @@ public sealed class GameWindowSlice8BoundaryTests
         Assert.DoesNotContain("private void OnUiDragReleasedOutside(", source, StringComparison.Ordinal);
         Assert.DoesNotContain("DragReleasedOutsideUi +=", source, StringComparison.Ordinal);
         Assert.Equal(1, CountOccurrences(
-            load,
-            "AcDream.App.Input.GameplayInputActionRouter.Create("));
-        Assert.Equal(1, CountOccurrences(load, "_gameplayInputActions.Attach();"));
+            sessionPhase,
+            "GameplayInputActionRouter.Create("));
+        Assert.Equal(1, CountOccurrences(
+            sessionPhase,
+            "gameplayActions.Attach();"));
         Assert.Equal(1, CountOccurrences(
             LivePresentationSource(),
             "RetainedUiGameplayBinding.Create("));
@@ -214,7 +250,7 @@ public sealed class GameWindowSlice8BoundaryTests
     {
         string load = MethodBody(
             "private void OnLoad()",
-            "private AcDream.App.Net.LiveSessionHost");
+            "private void OnUpdate(double dt)");
         string body = MethodBody(
             "private void OnFramebufferResize(",
             "private void OnClosing()");
@@ -251,7 +287,7 @@ public sealed class GameWindowSlice8BoundaryTests
         string run = MethodBody("public void Run()", "private void OnLoad()");
         string load = MethodBody(
             "private void OnLoad()",
-            "private AcDream.App.Net.LiveSessionHost");
+            "private void OnUpdate(double dt)");
         string shutdown = MethodBody(
             "private ResourceShutdownTransaction CreateShutdownTransaction()",
             "private void OnFocusChanged(bool focused)");
@@ -295,7 +331,7 @@ public sealed class GameWindowSlice8BoundaryTests
             "this).Compose(platform, hostInputCamera, contentEffectsAudio);",
             "new WorldRenderCompositionPhase(",
             "new SessionPlayerCompositionPhase(",
-            "_liveSessionHost.Start(_options)");
+            "sessionPlayer.SessionHost.Start(_options)");
         string sessionPhase = File.ReadAllText(Path.Combine(
             FindRepoRoot(),
             "src",
@@ -464,7 +500,7 @@ public sealed class GameWindowSlice8BoundaryTests
         string source = GameWindowSource();
         string load = MethodBody(
             "private void OnLoad()",
-            "private AcDream.App.Net.LiveSessionHost");
+            "private void OnUpdate(double dt)");
         string shutdown = Slice(
             source,
             "private ResourceShutdownTransaction CreateShutdownTransaction()",