fix(rendering): bound portal resource lifetime

Separate logical ownership, render publication, and GPU retirement across live entities, landblocks, particles, textures, mesh arenas, portal/UI teardown, and per-frame scratch storage. Add bounded DAT/texture caches, upload budgets, three-frame fence retirement, exact-incarnation appearance reconciliation, frame pacing, and extensive lifetime conformance coverage.\n\nThe seven-destination connected route now cuts peak working/private memory roughly in half, returns Caul to 125-153 FPS locally, and produces no WER or AMD reset.\n\nCo-authored-by: OpenAI Codex <codex@openai.com>

tests/AcDream.Core.Tests/Plugins/WorldGameStateTests.cs

@@ -0,0 +1,50 @@
+using System.Numerics;
+using AcDream.Core.Plugins;
+using AcDream.Plugin.Abstractions;
+
+namespace AcDream.Core.Tests.Plugins;
+
+public sealed class WorldGameStateTests
+{
+    private static WorldEntitySnapshot S(uint id, uint sourceId = 0x01000000u) =>
+        new(id, sourceId, Vector3.Zero, Quaternion.Identity);
+
+    [Fact]
+    public void Add_ReplacesExistingProjectionById()
+    {
+        var state = new WorldGameState();
+        state.Add(S(1));
+        state.Add(S(1, 0x01000001u));
+
+        WorldEntitySnapshot current = Assert.Single(state.Entities);
+        Assert.Equal(0x01000001u, current.SourceId);
+    }
+
+    [Fact]
+    public void RemoveById_CompactsIndexWithoutLosingOtherEntities()
+    {
+        var state = new WorldGameState();
+        state.Add(S(1));
+        state.Add(S(2));
+        state.Add(S(3));
+
+        Assert.True(state.RemoveById(2));
+        state.Add(S(3, 0x01000003u));
+
+        Assert.Equal(2, state.Entities.Count);
+        Assert.DoesNotContain(state.Entities, entity => entity.Id == 2);
+        Assert.Equal(0x01000003u, Assert.Single(state.Entities, entity => entity.Id == 3).SourceId);
+    }
+
+    [Fact]
+    public void Clear_RemovesCurrentProjectionAndIndex()
+    {
+        var state = new WorldGameState();
+        state.Add(S(1));
+        state.Clear();
+        state.Add(S(1, 0x01000001u));
+
+        WorldEntitySnapshot current = Assert.Single(state.Entities);
+        Assert.Equal(0x01000001u, current.SourceId);
+    }
+}