Move playwrite stuff to utils folder

e2e/utils/e2e-teardown.ts

@@ -0,0 +1,23 @@
+import fs from "node:fs";
+import path from "node:path";
+import { execFileSync } from "node:child_process";
+
+/**
+ * Merges the per-test istanbul coverage chunks collected in `.nyc_output` into a
+ * report (configured by `.nycrc.json`) once the whole e2e run has finished.
+ */
+export default function globalTeardown(): void {
+  const dir = path.resolve(process.cwd(), ".nyc_output");
+  const hasCoverage = fs.existsSync(dir) && fs.readdirSync(dir).some((f) => f.endsWith(".json"));
+  if (!hasCoverage) {
+    console.warn("No coverage data collected; skipping coverage report.");
+    return;
+  }
+  try {
+    execFileSync("npx", ["nyc", "report"], { stdio: "inherit" });
+  } catch (error) {
+    // Don't fail the whole run if the report can't be generated (e.g. when
+    // running against a container whose source paths differ from the host).
+    console.warn("Failed to generate coverage report:", error);
+  }
+}