perf(rendering): retain synchronous frame scratch

Reuse the PView frame input, publish mutation-invalidated landblock views, and avoid constructing optional shadow iterators while preserving title and lifecycle visibility facts.

tests/AcDream.App.Tests/Rendering/RetailPViewPassExecutorTests.cs

@@ -418,34 +418,32 @@ public sealed class RetailPViewPassExecutorTests
                 null));
         }
 
-        return new RetailPViewFrameInput
-        {
-            RootCell = root,
-            NearbyBuildingCells = nearbyBuildingCells,
-            ViewerEyePos = Vector3.Zero,
-            ViewProjection = TestCamera.ViewProjection,
-            Cells = new DictionaryCellSource(cells),
-            Camera = new TestCamera(),
-            CameraWorldPosition = Vector3.Zero,
-            Frustum = null,
-            PlayerLandblockId = root.CellId & 0xFFFF0000u,
-            AnimatedEntityIds = null,
-            RenderCenterLbX = 0,
-            RenderCenterLbY = 0,
-            RenderRadius = 1,
-            LandblockEntries = entries,
-            RenderSky = true,
-            RenderWeather = true,
-            DayFraction = 0f,
-            ActiveDayGroup = null,
-            SkyKeyframe = default,
-            EnvironOverrideActive = false,
-            ViewerCellId = root.CellId,
-            PlayerCellId = root.CellId,
-            PlayerViewPosition = Vector3.Zero,
-            CameraView = TestCamera.ViewMatrix,
-            CameraCellResolution = CameraCellResolution.None,
-        };
+        return new RetailPViewFrameInput().Reset(
+            root,
+            nearbyBuildingCells,
+            Vector3.Zero,
+            TestCamera.ViewProjection,
+            new DictionaryCellSource(cells),
+            new TestCamera(),
+            Vector3.Zero,
+            frustum: null,
+            playerLandblockId: root.CellId & 0xFFFF0000u,
+            animatedEntityIds: null,
+            renderCenterLbX: 0,
+            renderCenterLbY: 0,
+            renderRadius: 1,
+            landblockEntries: entries,
+            renderSky: true,
+            renderWeather: true,
+            dayFraction: 0f,
+            activeDayGroup: null,
+            skyKeyframe: default,
+            environOverrideActive: false,
+            viewerCellId: root.CellId,
+            playerCellId: root.CellId,
+            playerViewPosition: Vector3.Zero,
+            cameraView: TestCamera.ViewMatrix,
+            cameraCellResolution: CameraCellResolution.None);
     }
 
     private static LoadedCell InteriorWithExit(uint cellId)