Pixi v8 alignment in 2 room-widget helpers

- ChooserSelectionVisualizer: sprite.blendMode is BLEND_MODES (string
  enum in Pixi v8: 'normal' | 'add' | 'multiply' | ...). The legacy
  Pixi numeric enum compared against '=== 1' (ADD); switch to '=== "add"'.
- MannequinUtilities.MANNEQUIN_FIGURE was inferred as
  (string | number | number[])[]: the 'hd' / 99999 / [99998] triple
  needs to be a typed tuple [string, number, number[]] so the
  figureContainer.updatePart(string, number, number[]) call resolves.

src/api/room/widgets/ChooserSelectionVisualizer.ts

@@ -48,7 +48,7 @@ export class chooserSelectionVisualizer
 
         for (const sprite of visualization.sprites)
         {
-            if (sprite.blendMode === 1) continue;
+            if (sprite.blendMode === 'add') continue;
             const existing = (sprite.filters || []).filter(f => !(f instanceof ChooserSelectionFilter));
             sprite.filters = [...existing, filter];
         }

src/api/room/widgets/MannequinUtilities.ts

@@ -2,7 +2,7 @@ import { AvatarFigurePartType, GetAvatarRenderManager, IAvatarFigureContainer }
 
 export class MannequinUtilities
 {
-    public static MANNEQUIN_FIGURE = [ 'hd', 99999, [ 99998 ] ];
+    public static MANNEQUIN_FIGURE: [ string, number, number[] ] = [ 'hd', 99999, [ 99998 ] ];
     public static MANNEQUIN_CLOTHING_PART_TYPES = [
         AvatarFigurePartType.CHEST_ACCESSORY,
         AvatarFigurePartType.COAT_CHEST,