refactor(runtime): unify generation reset for direct hosts

Move canonical per-session teardown into one retryable Runtime transaction, reduce App reset to projection acknowledgements, and prove the same GameRuntime graph through deterministic no-window lifecycle, gameplay, portal, fault, reconnect, and isolation gates.\n\nCo-authored-by: Codex <noreply@openai.com>

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

@@ -945,31 +945,17 @@ public sealed class CurrentGameRuntimeAdapterTests
         {
             MouseCapture = noop,
             PlayerPresentation = noop,
-            TeleportTransit = noop,
+            TeleportPresentation = noop,
             SessionDialogs = noop,
-            ChatCommandTargets = noop,
             SettingsCharacterContext = noop,
             EquippedChildren = noop,
-            ExternalContainer = noop,
-            InteractionAndSelection = noop,
-            InventoryTransactions = noop,
+            InteractionPresentation = noop,
             SelectionPresentation = noop,
-            ObjectTable = noop,
-            Spellbook = noop,
-            MagicRuntime = noop,
-            CombatAttack = noop,
-            CombatState = noop,
-            ItemMana = noop,
-            LocalPlayer = noop,
-            Friends = noop,
-            Squelch = noop,
-            TurbineChat = noop,
             ParticleVisibility = noop,
             InboundEventFifo = noop,
             LiveLiveness = noop,
-            LiveRuntime = noop,
-            RenderSceneProjection = noop,
-            SessionIdentity = noop,
+            RuntimeGeneration = _ => { },
+            SessionIdentityPresentation = _ => { },
             RemoteTeleport = noop,
             NetworkEffects = noop,
             AnimationHookFrames = noop,