refactor(runtime): expose canonical gameplay state

Move character options and movement skills into the Runtime-owned character graph, expose borrowed inventory, character, and social views, and route retained UI state commands through generation-gated typed Runtime contracts. Preserve the existing synchronous wire path while deleting the App-owned option and skill mirrors and extending normalized parity checkpoints.

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

src/AcDream.Runtime/GameRuntimeViews.cs

@@ -110,6 +110,9 @@ public readonly record struct RuntimeStateCheckpoint(
     int MaterializedEntityCount,
     int InventoryObjectCount,
     int InventoryContainerCount,
+    RuntimeInventoryStateSnapshot InventoryState,
+    RuntimeCharacterSnapshot Character,
+    RuntimeSocialSnapshot Social,
     long ChatRevision,
     int ChatCount,
     RuntimeMovementSnapshot Movement,
@@ -127,6 +130,12 @@ public interface IGameRuntimeView
 
     IRuntimeInventoryView Inventory { get; }
 
+    IRuntimeInventoryStateView InventoryState { get; }
+
+    IRuntimeCharacterView Character { get; }
+
+    IRuntimeSocialView Social { get; }
+
     IRuntimeChatView Chat { get; }
 
     IRuntimeMovementView Movement { get; }