Add forgot/reset password UI and Resend email config

- Forgot password form in auth modal with email input
- Reset password form handles token from email link
- /reset-password route serves index.html for SPA
- EMAIL_FROM env var in docker-compose
- Success/error feedback for both flows

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

docker-compose.prod.yml

@@ -26,6 +26,7 @@ services:
       - REDIS_URL=redis://redis:6379
       - SECRET_KEY=${SECRET_KEY}
       - RESEND_API_KEY=${RESEND_API_KEY:-}
+      - EMAIL_FROM=${EMAIL_FROM:-Golf Cards <noreply@golfcards.club>}
       - SENTRY_DSN=${SENTRY_DSN:-}
       - ENVIRONMENT=production
       - LOG_LEVEL=INFO