test(e2e) : add Playwright setup with product and category CRUD specs

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

playwright.config.ts

@@ -0,0 +1,37 @@
+import { defineConfig, devices } from '@playwright/test'
+
+const AUTH_FILE = 'e2e/.auth/session.json'
+
+export default defineConfig({
+  testDir: './e2e',
+  fullyParallel: false,
+  forbidOnly: !!process.env.CI,
+  retries: process.env.CI ? 2 : 0,
+  workers: 1,
+  reporter: 'html',
+  timeout: 30_000,
+
+  use: {
+    baseURL: process.env.E2E_BASE_URL || 'http://localhost:3001',
+    trace: 'on-first-retry',
+    screenshot: 'only-on-failure',
+  },
+
+  projects: [
+    // Auth setup: selects a profile to get a session cookie
+    {
+      name: 'auth-setup',
+      testMatch: /auth\.setup\.ts/,
+    },
+
+    // All tests run after auth setup, with the saved session
+    {
+      name: 'chromium',
+      use: {
+        ...devices['Desktop Chrome'],
+        storageState: AUTH_FILE,
+      },
+      dependencies: ['auth-setup'],
+    },
+  ],
+})