Handle blob removal in spawn system

src/spawn.js

@@ -452,6 +452,21 @@
       });
     };
 
+    const removeBlob = (blobId) => {
+      if (!blobId) return;
+      const constraints = blobConstraints.get(blobId) || [];
+      constraints.forEach((c) => World.remove(world, c));
+      blobConstraints.delete(blobId);
+      for (let i = balls.length - 1; i >= 0; i -= 1) {
+        const ball = balls[i];
+        if (ball.plugin?.blobId === blobId) {
+          cleanupBall(ball);
+          World.remove(world, ball);
+          balls.splice(i, 1);
+        }
+      }
+    };
+
     const resetSpawnState = () => {
       spawnCount = 0;
     };
@@ -465,6 +480,7 @@
       updateBallRadius,
       computeBallRadius,
       cleanupBall,
+      removeBlob,
       resetSpawnState,
     };
   };