Change username filter to use icontains for partial/case-insensitive matching. In CustomUser.save, introduce _NULLABLE_CHAR_FIELDS and convert empty string char fields to None to ensure nullable fields are stored consistently. Update CreateChatModal to always show a subtitle combining the user's full name and account creation date (joined with " · "), improving UI information.
Introduces a weekly summary email for newly added products, including a new email template and Celery periodic task. Adds 'include_in_week_summary_email' to Product and 'newsletter' to CustomUser. Provides an admin endpoint to manually trigger the weekly email, updates Celery Beat schedule, and adds email templates for verification and password reset.
Introduces a new /api/choices/ endpoint for fetching model choices with multilingual labels. Updates Django models to use 'cz#' prefix for Czech labels. Adds OpenAPI client generation via orval, refactors frontend API structure, and provides documentation and helper scripts for dynamic choices and OpenAPI usage.
