feat(runtime): share chat commands and run login sequence

src/AcDream.Runtime/Session/LiveSessionHost.cs

@@ -1,5 +1,6 @@
 using System.Runtime.ExceptionServices;
 using AcDream.Core.Net;
+using AcDream.Runtime.Chat;
 
 namespace AcDream.Runtime.Session;
 
@@ -39,7 +40,8 @@ public sealed record LiveSessionHostBindings(
     /// <see cref="EnteredWorld"/>'s narrow <c>SetActiveCharacter(string)</c>
     /// fan-out, this exists so a status writer can emit the
     /// <c>enteredWorld</c> event's <c>characterId</c> field.</summary>
-    Action<LiveSessionCharacterSelection> CharacterEntered);
+    Action<LiveSessionCharacterSelection> CharacterEntered,
+    LoginCommandSequence? LoginCommands = null);
 
 /// <summary>
 /// Runtime host for the one canonical <see cref="LiveSessionController"/>.
@@ -47,7 +49,9 @@ public sealed record LiveSessionHostBindings(
 /// composition, but never mirrors session, generation, identity, routing, or
 /// command state.
 /// </summary>
-public sealed class LiveSessionHost : IRuntimeSessionCommands
+public sealed class LiveSessionHost
+    : IRuntimeSessionCommands,
+      IRuntimeLiveSessionFramePhase
 {
     private sealed class PendingRouteRollback(
         ILiveSessionCommandRouting? commands,
@@ -98,6 +102,7 @@ public sealed class LiveSessionHost : IRuntimeSessionCommands
     private readonly Action<LiveSessionCharacterSelection> _characterEntered;
     private readonly Action<RuntimeGenerationToken> _reset;
     private readonly LiveSessionLifecycleHost _lifecycle;
+    private readonly LoginCommandSequence? _loginCommands;
     private PendingRouteRollback? _pendingRouteRollback;
 
     public LiveSessionHost(
@@ -114,6 +119,7 @@ public sealed class LiveSessionHost : IRuntimeSessionCommands
             ?? throw new ArgumentNullException(nameof(bindings.EnteredWorld));
         _characterEntered = bindings.CharacterEntered
             ?? throw new ArgumentNullException(nameof(bindings.CharacterEntered));
+        _loginCommands = bindings.LoginCommands;
         ArgumentNullException.ThrowIfNull(_routing.CreateEvents);
         ArgumentNullException.ThrowIfNull(_routing.CreateCommands);
         ArgumentNullException.ThrowIfNull(bindings.Reset);
@@ -176,6 +182,17 @@ public sealed class LiveSessionHost : IRuntimeSessionCommands
         RuntimeGenerationToken expectedGeneration) =>
         _controller.Stop(expectedGeneration);
 
+    /// <summary>
+    /// Pumps the canonical network session first, then any due login command.
+    /// Both graphical and headless frame loops use this host boundary so the
+    /// sequencing contract cannot drift between them.
+    /// </summary>
+    public void Tick()
+    {
+        _controller.Tick();
+        _loginCommands?.Tick(_controller.Generation, _controller.IsInWorld);
+    }
+
     private LiveSessionBinding BindSession(WorldSession session)
     {
         DrainPendingRouteRollback();
@@ -211,6 +228,7 @@ public sealed class LiveSessionHost : IRuntimeSessionCommands
         // state below. Treat physical route convergence as the same hard
         // barrier used by normal LiveSessionBinding teardown.
         DrainPendingRouteRollback();
+        _loginCommands?.Cancel(retiringGeneration);
         _reset(retiringGeneration);
     }
 
@@ -234,6 +252,7 @@ public sealed class LiveSessionHost : IRuntimeSessionCommands
         _enteredWorld.LoadCharacterSettings(name);
         _enteredWorld.ArmPlayerModeAutoEntry();
         _characterEntered(selection);
+        _loginCommands?.EnteredWorld(_controller.Generation);
     }
 
     private void RethrowWithRetryableRollback(

src/AcDream.Runtime/Session/SessionStatusWriter.cs

@@ -228,6 +228,22 @@ public sealed class SessionStatusWriter
             error,
         });
 
+    public void LoginCommandFailed(
+        string sessionId,
+        int commandIndex,
+        string command,
+        string error) =>
+        Write(new
+        {
+            v = VocabularyVersion,
+            e = "loginCommandFailed",
+            t = Now(),
+            sessionId,
+            commandIndex,
+            command,
+            error,
+        });
+
     public void Disconnected(string sessionId, string reason)
     {
         if (!IsEnabled)