Add Playwright e2e test suite

README.md

@@ -37,6 +37,29 @@ bun run build
 bun run start
 ```
 
+## Browser E2E tests
+
+Install Playwright's Chromium browser once:
+
+```bash
+bun run test:e2e:install
+```
+
+Run the suite:
+
+```bash
+bun run test:e2e
+```
+
+Useful variants:
+
+```bash
+bun run test:e2e:headed
+bun run test:e2e:ui
+```
+
+The Playwright web server boot path uses an isolated SQLite database at `data/e2e.sqlite`, forces local Better Auth origins for the test port, and stores artifacts under `output/playwright/`.
+
 ## Docker deployment
 
 ```bash