Real-Time Update of Expense Calculations

[Mari618]

As a member of a group managing shared expenses, I want to see real-time updates to the calculations of who owes what as expenses are added, modified, or deleted, so that I can have up-to-date information on how much each person owes or is owed without having to manually refresh or recalculate.

Acceptance Criteria:
Real-Time Expense Addition:

• When a new expense is added, the system should instantly update the calculations of total contributions, amounts owed, and amounts to be received by each participant.

Real-Time Expense Modification:

• When an existing expense is modified (e.g., amount, participants, or contribution weights), the system should immediately recalculate and display the updated amounts owed or received by each participant.

Real-Time Expense Deletion:

• When an expense is deleted, the system should promptly adjust the calculations and reflect the new balances for each participant.

User Interface:

• The updated information should be visible to all participants in real-time without needing to manually refresh or navigate away from the page.

Consistency Across Devices:

• The real-time updates should be synchronized across all devices and platforms where participants are viewing the expense details.

Notifications:

• Participants should receive visual or system notifications when calculations are updated due to changes in expenses, ensuring they are aware of the latest information.