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>

tests/AcDream.Runtime.Tests/Gameplay/RuntimeCommunicationStateTests.cs

@@ -6,6 +6,44 @@ namespace AcDream.Runtime.Tests.Gameplay;
 
 public sealed class RuntimeCommunicationStateTests
 {
+    [Fact]
+    public void SocialViewBorrowsFriendsAndSquelchOwners()
+    {
+        using var state = new RuntimeCommunicationState();
+        state.Friends.Apply(new AcDream.Core.Social.FriendsUpdate(
+            AcDream.Core.Social.FriendsUpdateType.Full,
+            [
+                new AcDream.Core.Social.FriendEntry(
+                    0x50000001u,
+                    "Friend",
+                    Online: true,
+                    AppearOffline: false,
+                    Friends: [],
+                    FriendOf: []),
+            ]));
+        state.Squelch.Replace(new AcDream.Core.Social.SquelchDatabase(
+            new Dictionary<string, uint>(StringComparer.OrdinalIgnoreCase)
+            {
+                ["account"] = 1u,
+            },
+            new Dictionary<uint, AcDream.Core.Social.SquelchInfo>(),
+            new AcDream.Core.Social.SquelchInfo(
+                string.Empty,
+                false,
+                new HashSet<uint> { 3u })));
+
+        RuntimeSocialSnapshot snapshot = state.SocialView.Snapshot;
+
+        Assert.Equal(1, snapshot.FriendCount);
+        Assert.Equal(1, snapshot.SquelchedAccountCount);
+        Assert.Equal(1, snapshot.GlobalSquelchTypeCount);
+        Assert.True(state.SocialView.TryGetFriend(
+            0x50000001u,
+            out RuntimeFriendSnapshot friend));
+        Assert.Equal("Friend", friend.Name);
+        Assert.True(friend.Online);
+    }
+
     [Fact]
     public void OwnsOneExactCommunicationGraphAndPublishesCommittedEntries()
     {