feat: refine match3d spawn visuals

src/components/match3d-runtime/Match3DRuntimeShell.test.tsx

@@ -31,6 +31,7 @@ import {
   resolveMatch3DSpawnTimingPlan,
   resolveMatch3DStackTargetY,
   resolveMatch3DSpawnDelay,
+  resolveMatch3DSpawnVisualScale,
   resolveMatch3DSpawnY,
   resolveMatch3DTrayPreviewRotation,
   resolveMatch3DTrayPreviewReferenceDimension,
@@ -591,6 +592,18 @@ test('3D 新物体生成高度会避让同位置已有堆叠', () => {
   expect(unchangedSpawnY).toBe(plannedSpawnY);
 });
 
+test('3D 新物体生成动画只缩放可见模型并最终回到完整尺寸', () => {
+  const startScale = resolveMatch3DSpawnVisualScale(0);
+  const middleScale = resolveMatch3DSpawnVisualScale(0.5);
+  const endScale = resolveMatch3DSpawnVisualScale(1);
+
+  expect(startScale).toBeGreaterThan(0);
+  expect(startScale).toBeLessThan(0.25);
+  expect(middleScale).toBeGreaterThan(startScale);
+  expect(middleScale).toBeLessThan(endScale);
+  expect(endScale).toBe(1);
+});
+
 test('积木视觉键不会被统一兜底成红色苹字', () => {
   const run = startLocalMatch3DRun(2);
   run.items = run.items.slice(0, 2).map((item, index) => ({