Per-Expense Shared Option + Summary View

Currently, the split percentage can only be adjusted in settings. When adding an expense or recurring payment, I can only assign it to myself or my partner.

There should be a third option: “Shared/Common” for joint expenses (e.g., rent, utilities).

Each expense should allow:

• Personal (me)

• Personal (partner)

• Shared (split based on predefined percentage, and this would be automatically calculated based on the setting amount)

Additionally, there should be a monthly summary tab that clearly separates:

• Total personal expenses

• Total partner expenses

• Total shared expenses

This would make it much easier to track individual vs joint spending.