[Feature] Special Currency (Diamonds)

[gn01842919]

Feature Description:

Introduce a new type of currency, similar to "diamonds" in typical mobile games. This currency can only be earned through special or challenging tasks and can be used to purchase items unavailable for regular money. It can also be exchanged for coins by purchasing coin boxes.

This system motivates users to tackle tasks they particularly dislike. Completing such tasks earns them rewards they wouldn’t normally allow themselves, such as expensive luxury items or a lavish meal. Moreover, users could agree with their partner/friends to offer specific benefits/services as purchasable items with diamonds.