fix(render): restore retail per-cell alpha order

Reconstruct one combined static/dynamic object-part stream for each ordinary outdoor or interior cell, compute authored SortCenter CYpt keys, and stable-sort far to near before projecting opaque and delayed subsets. Prepare real cell-particle records at the leaf, preserve every S4-c2 router outcome, and merge object and particle delayed records by retained key before either source appends to the unchanged CLIP/ALPHA FIFO lists. Cell turns remain cell-major; equal cross-source ties are deterministically object-first.

File AP-241 and AP-242 for the remaining separate opaque/row-5 channels and unrepresented equal-key common ordinal. File AP-243 for the paired-binary correction: retail shares the cell CYpt/heading beyond 50 m while this bounded port always uses the more exact authored per-part center. Pin 162 active AP rows and correct world-alpha and AlphaFlushCounts prose.

Lead-approved scope clarification: RetailPViewPassExecutor.WalkLeaf.cs and RetailPViewPassExecutor.cs are the minimum existing production leaf adapter and thin particle-prepare forwarder omitted by the literal Walk/Wb file list. They contain no router, queue, mask, state, depth, or flush behavior; relocating them would create an artificial seam.

Gates: Release solution build 0W/0E; shader/manifest 32/32; focused production 210/210; real allocation 3/3 at 0 B; one-shot hermetic 16743/0/0 across 14 assemblies; InstalledDat 385 pass/10 documented fail/1 skip with all six AlphaFlushSites passing; git diff --check PASS. Initial no-restore solution build failed NETSDK1004 for 42 missing scratch assets; one solution restore preceded the official build.

Mutation proof, each restored before final gates:

1. Reverse comparator: authored-center order expected [202,101], actual [101,202].

2. Move ties left: multipart/subset order expected [11,12,21,22], actual [22,21,12,11].

3. Restore static/dynamic blocks: expected [2,3,1], actual [3,1,2].

4. Use entity origin: authored-center order expected [202,101], actual [101,202].

5. Restore particle tail: expected [Wb,Particle,Wb,Particle], actual [Wb,Wb,Particle,Particle].

6. Scope-global sort: first cell model X expected 5, actual 50.

7. Restore dead camera parameter: SubmitWalkAlphaInstance parameter count expected 2, actual 3.

8. Restore stale global-queue prose: exact Assert.DoesNotContain failure on distance-sorts one shared queue.

9. Remove AP-241 identity: Assert.Single found no matching row.

10. Allocate in real merge: expected 0 B, actual 3072 B.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

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

@@ -47,9 +47,12 @@ namespace AcDream.App.Rendering.Wb;
 /// <c>DrawElementsIndirectCommand</c>. Per-frame ring allocations carry instance
 /// matrices (binding 0), per-group batch metadata/texture-table slots (binding
 /// 1), and the indirect draw commands. Opaque world groups remain MDI-batched.
-/// Transparent world instances enter <see cref="RetailAlphaQueue"/> so ordinary
-/// GfxObj parts and particles share retail's stable far-to-near stream; sealed
-/// off-screen consumers retain the immediate transparent MDI path.
+/// Transparent world instances enter <see cref="RetailAlphaQueue"/> after
+/// <c>WalkFrameDriver</c> reconstructs retail's stable far-to-near order
+/// independently for each object-cell turn from authored part SortCenter.
+/// Object and particle records are merged before they append to retail's two
+/// FIFO lists; sealed off-screen consumers retain the immediate transparent
+/// MDI path.
 /// </para>
 ///
 /// <para>
@@ -2419,14 +2422,11 @@ public sealed partial class WbDrawDispatcher : IDisposable
             throw new InvalidOperationException(
                 "One retail alpha scope cannot combine different view-projection matrices.");
 
-        // Retail CShadowPart::insertion_sort (0x006B5130) is stable:
-        // equal-CYpt parts keep the order in which the cell submitted them.
         // Material grouping is an acdream batching detail and must not become
-        // that tiebreak. Reconstruct the original draw-local instance order
-        // before handing entries to the queue — S4-c2: retail's own queue is
-        // FIFO (D3DPolyRender::AddMeshToAlphaList never sorts), so preserving
-        // this walk-order sequence IS the ordering, not a sort key for a
-        // later comparator.
+        // a tiebreak. Reconstruct original draw-local submission order before
+        // handing entries to retail's FIFO queue. The normal-world walk path
+        // does not use this grouped route: WalkStaticStreamPopulator performs
+        // the per-cell stable CYpt sort before its per-instance submissions.
         _alphaFingerprintScratch.Clear();
         foreach (InstanceGroup group in _translucentDraws)
         {