fix: WebGPU test predicate matches supportsWebGPU(); add .github/scripts/package.json for CJS compat

Agent-Logs-Url: https://github.com/ap0ught/matrix/sessions/33b6f514-63c2-46f5-b6ef-946ab3534b4f

Co-authored-by: ap0ught <41078+ap0ught@users.noreply.github.com>

Author: Copilot

.github/scripts/package.json

@@ -0,0 +1 @@
+{ "type": "commonjs" }

tests/matrix-smoke.spec.js

@@ -34,15 +34,21 @@ test.describe("Matrix WebGL effects smoke", () => {
 	});
 });
 
+/**
+ * Mirrors the supportsWebGPU() predicate in js/main.js so tests skip precisely
+ * when the app itself would fall back to WebGL (not just when navigator.gpu is absent).
+ */
+const browserSupportsWebGPU = () => window.GPUQueue != null && navigator.gpu != null && navigator.gpu.getPreferredCanvasFormat != null;
+
 test.describe("Matrix WebGPU smoke", () => {
 	test("effect=palette when WebGPU available", async ({ page }) => {
-		const hasGpu = await page.evaluate(() => !!navigator.gpu);
+		const hasGpu = await page.evaluate(browserSupportsWebGPU);
 		test.skip(!hasGpu, "WebGPU not available in this browser");
 		await assertMatrixBootsClean(page, `${baseQuery}&renderer=webgpu&effect=palette`);
 	});
 
 	test("effect=mirror when WebGPU available", async ({ page }) => {
-		const hasGpu = await page.evaluate(() => !!navigator.gpu);
+		const hasGpu = await page.evaluate(browserSupportsWebGPU);
 		test.skip(!hasGpu, "WebGPU not available in this browser");
 		await assertMatrixBootsClean(page, `${baseQuery}&renderer=webgpu&effect=mirror`);
 	});