fix(rendering): port retail shared alpha list

Queue translucent world GfxObj batches and scene particles in one stable far-to-near stream using transformed DAT sort centers, then drain it at retail's landscape and final-world boundaries. Preserve authored blend, cull, lighting, opacity, and adjacent-only batching so particles behind lifestones are composited through the crystal instead of overpainting it.

Release build succeeds and all 5,914 tests pass with five intentional skips.

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

src/AcDream.App/Rendering/Wb/CachedBatch.cs

@@ -8,6 +8,8 @@ namespace AcDream.App.Rendering.Wb;
 /// subPart contributes its own <see cref="CachedBatch"/> entries, with
 /// <see cref="RestPose"/> already containing the
 /// <c>subPart.PartTransform * meshRef.PartTransform</c> product.
+/// <see cref="LocalSortCenter"/> preserves the authored GfxObj key used by
+/// retail's delayed-alpha viewer-distance ordering on cache hits.
 ///
 /// Accessibility: <c>internal</c> because <see cref="GroupKey"/> is
 /// <c>internal</c> and shows up in this struct's constructor / <c>Deconstruct</c>
@@ -18,7 +20,8 @@ namespace AcDream.App.Rendering.Wb;
 internal readonly record struct CachedBatch(
     GroupKey Key,
     ulong BindlessTextureHandle,
-    Matrix4x4 RestPose);
+    Matrix4x4 RestPose,
+    Vector3 LocalSortCenter = default);
 
 /// <summary>
 /// One entity's cached classification. <see cref="Batches"/> is flat across