Initialize project and ignore local references

tests/e2e/playwright.config.ts

@@ -0,0 +1,18 @@
+import { defineConfig } from "@playwright/test";
+
+export default defineConfig({
+  testDir: ".",
+  testMatch: ["desktop.smoke.spec.ts"],
+  timeout: 120_000,
+  fullyParallel: false,
+  workers: 1,
+  reporter: "list",
+  use: {
+    trace: "on-first-retry",
+    screenshot: "only-on-failure",
+  },
+  // Build from current source before running e2e tests.
+  // Uses globalSetup (not webServer) because electron-vite build is a
+  // one-shot build command, not a long-running server process.
+  globalSetup: "./e2e-global-setup.ts",
+});