docs: cerrar issue 0022b — auth fixtures y helpers E2E

Mover issue a completed/ y actualizar README.

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

dev/issues/README.md

@@ -28,5 +28,5 @@ afectados y notas de implementacion.
 | 21 | Threads default config       | (completado via branch)                                              | completado |
 | 22  | Tests E2E con Playwright     | [0022-e2e-tests-playwright.md](0022-e2e-tests-playwright.md)         | pendiente  |
 | 22a | E2E: Infraestructura base    | [0022a-e2e-infra.md](completed/0022a-e2e-infra.md)                   | completado |
-| 22b | E2E: Auth fixtures y helpers | [0022b-e2e-auth-helpers.md](0022b-e2e-auth-helpers.md)               | pendiente  |
+| 22b | E2E: Auth fixtures y helpers | [0022b-e2e-auth-helpers.md](completed/0022b-e2e-auth-helpers.md)     | completado |
 | 22c | E2E: Tests de agentes + docs | [0022c-e2e-agent-tests.md](0022c-e2e-agent-tests.md)                 | pendiente  |