Fixes: 1) Replace redundant or missing translation calls in configuration values; 2) Correct oversight in description consistency for existing fields.
Extra: Refactor `CONSTANCE_CONFIG` structure for improved readability using multi-line formatting where necessary; clean up imports to include `gettext_lazy` and `json`.
Introduce a global config flag `DISABLED_COMMERCE` to toggle buy functionality availability. Raise specific `DisabledCommerceError` when buying is disabled, ensuring end-users are informed. Additionally, reformat code for readability and consistency, improving overall maintainability.
