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/Composition/SessionPlayerCompositionTests.cs

@@ -116,7 +116,19 @@ public sealed class SessionPlayerCompositionTests
             "new PlayerModeController(",
             "d.PortalTunnelFallback.Transfer(",
             "d.TeleportSink.BindOwned(localTeleport)",
+            "sessionRuntimeFactory.Create(liveSession)",
+            "d.CombatModeCommands.BindOwned(combatCommand)",
+            "d.RuntimeDiagnosticCommands.BindOwned(runtimeDiagnostics)",
+            "GameplayInputActionRouter.Create(",
+            "gameplayActions.Attach();",
             "_publication.PublishSessionPlayer(result);");
+
+        Assert.DoesNotContain("GameWindow", File.ReadAllText(Path.Combine(
+            FindRepoRoot(),
+            "src",
+            "AcDream.App",
+            "Net",
+            "LiveSessionRuntimeFactory.cs")), StringComparison.Ordinal);
     }
 
     private sealed class RetryBinding(