- handleFetch injects X-XSRF-TOKEN + XSRF-TOKEN cookie on all mutating
backend API requests (double-submit cookie pattern); generates a fresh
UUID when no XSRF-TOKEN cookie exists yet
- ErrorCode union gains CSRF_TOKEN_MISSING and TOO_MANY_LOGIN_ATTEMPTS;
getErrorMessage maps both to i18n keys
- de/en/es messages add error_csrf_token_missing and
error_too_many_login_attempts translations
- Login action maps HTTP 429 to fail(429, { ..., rateLimited: true });
page shows a muted clock icon with aria-invalid on rate-limit errors
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Mirrors the backend ErrorCode additions from commit 393a3c25.
Adds error_session_expired_explainer for the login-page banner that
will surface when ?reason=expired.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Adds the error code to the ErrorCode union and getErrorMessage() switch.
Adds admin_new_invite_groups, admin_invite_groups_load_error, and
error_group_has_active_invites to all three locale files (de/en/es).
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
