test: Cypress en Playwright e2e-suites voor login, agenda, cortex en verpleegrapportage

Configs voor beide runners, login via session caching, AI-chat
mocks (SSE) voor deterministische Cortex-tests. Supabase local
config toegevoegd. Auth-state en reports zijn gitignored.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

playwright.config.ts

@@ -0,0 +1,41 @@
+import { defineConfig, devices } from '@playwright/test';
+import { config } from 'dotenv';
+
+config({ path: '.env.local' });
+
+export default defineConfig({
+  testDir: './tests/playwright',
+  outputDir: './tests/test-results',
+  fullyParallel: false,
+  forbidOnly: !!process.env.CI,
+  retries: process.env.CI ? 2 : 0,
+  workers: 1,
+  reporter: [['html', { open: 'never', outputFolder: 'tests/playwright-report' }], ['line']],
+
+  use: {
+    baseURL: 'http://localhost:3000',
+    trace: 'on-first-retry',
+    screenshot: 'only-on-failure',
+    video: 'retain-on-failure',
+    locale: 'nl-NL',
+    timezoneId: 'Europe/Amsterdam',
+  },
+
+  projects: [
+    // Auth setup - runs first, creates storageState
+    {
+      name: 'setup',
+      testMatch: /auth\.setup\.ts/,
+    },
+
+    // All E2E tests - depend on setup, start authenticated
+    {
+      name: 'chromium',
+      use: {
+        ...devices['Desktop Chrome'],
+        storageState: 'tests/playwright/.auth/user.json',
+      },
+      dependencies: ['setup'],
+    },
+  ],
+});