fix(examples): replace textureOptions wholesale instead of mutating frozen default

examples/common/Character.ts

@@ -72,12 +72,14 @@ export class Character {
     const nextFrame = () => {
       // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
       this.node.texture = this.rightFrames[curI]!;
-      this.node.textureOptions.flipX = flipX;
       curI++;
       if (curI > iEnd) {
         curI = iStart;
       }
     };
+    // textureOptions must be replaced wholesale, never mutated in place —
+    // nodes created without options share a frozen default object.
+    this.node.textureOptions = { flipX };
     nextFrame();
     this.curIntervalAnimation = setInterval(nextFrame, intervalMs);
   }

examples/tests/texture-cleanup-critical.ts

@@ -51,13 +51,16 @@ See docs/ManualRegressionTests.md for more information.
     fontSize: 40,
   });
 
+  // textureOptions must be replaced wholesale, never mutated in place —
+  // nodes created without options share a frozen default object.
+  screen.textureOptions = { preload: true };
+
   // Create a new random texture every 10ms
   setInterval(() => {
     screen.texture = renderer.createTexture('NoiseTexture', {
       w: 500,
       h: 500,
       cacheId: Math.floor(Math.random() * 100000),
     });
-    screen.textureOptions.preload = true;
   }, 100);
 }