docs(CLAUDE.md): add code style section aligned with glyphdiff conventions

playwright.config.ts

@@ -0,0 +1,32 @@
+import { defineConfig, devices } from "@playwright/test";
+
+export default defineConfig({
+	testDir: "./src/tests/e2e",
+	fullyParallel: true,
+	forbidOnly: !!process.env.CI,
+	retries: process.env.CI ? 2 : 0,
+	workers: process.env.CI ? 1 : undefined,
+	reporter: "html",
+	use: {
+		baseURL: "http://localhost:4173",
+		trace: "on-first-retry",
+	},
+	projects: [
+		{
+			name: "chromium",
+			use: { ...devices["Desktop Chrome"] },
+		},
+		{
+			name: "firefox",
+			use: { ...devices["Desktop Firefox"] },
+		},
+		{
+			name: "webkit",
+			use: { ...devices["Desktop Safari"] },
+		},
+	],
+	webServer: {
+		command: "npm run build && npm run preview",
+		port: 4173,
+	},
+});