feat: Improve stone layer visibility and rendering

js/main.js

@@ -47,6 +47,16 @@ window.onload = function() {
     
     // Initialize the first chunk and generate terrain around it
     getOrCreateChunk(0, 0);
+    
+    // Explicitly create and mark the stone layer as dirty
+    for (let dx = -5; dx <= 5; dx++) {
+        const chunkX = dx;
+        const chunkY = 1; // Stone layer
+        const key = getChunkKey(chunkX, chunkY);
+        getOrCreateChunk(chunkX, chunkY);
+        dirtyChunks.add(key);
+    }
+    
     generateChunksAroundPlayer();
     
     // Start the simulation loop