Update gpu.js

gpu.js

@@ -1,21 +1,19 @@
-export async function initGPU(width, height) {
+// gpu.js — v9.2 hardened
+export async function initGPU() {
   if (!navigator.gpu) {
-    console.warn("WebGPU not supported, falling back to CPU");
-    return null;
+    console.warn("[GPU] WebGPU unavailable — CPU fallback engaged");
+    return { mode: "cpu", device: null };
   }
 
-  const adapter = await navigator.gpu.requestAdapter();
-  const device = await adapter.requestDevice();
+  try {
+    const adapter = await navigator.gpu.requestAdapter();
+    if (!adapter) throw new Error("No GPU adapter");
 
-  const size = width * height * 4;
-
-  const buffer = device.createBuffer({
-    size,
-    usage:
-      GPUBufferUsage.STORAGE |
-      GPUBufferUsage.COPY_SRC |
-      GPUBufferUsage.COPY_DST
-  });
-
-  return { device, buffer };
+    const device = await adapter.requestDevice();
+    console.log("[GPU] WebGPU initialized");
+    return { mode: "gpu", device };
+  } catch (e) {
+    console.error("[GPU] Initialization failed:", e);
+    return { mode: "cpu", device: null };
+  }
 }