Provision reserved balances and the useAccountBalances hook

[glad-adyen]

Summary

This PR introduces the following changes to the functionality for getting and rendering account balances.

• Add new useAccountBalances hook to encapsulate the entire logic for fetching account balances.
• Update the <Balances /> component to use the new useAccountBalances hook.
• Update mock data to include the reservedValue field indicating the reserved balance amount.

In addition, this PR also reverts the useBalanceAccountSelection hook to its previous state before the addition of analytics tracking. This was done to remove a tracking event that was wrongly being sent from the hook. In the near future, this event will be reintroduced, but in more appropriate location(s).

Fixed issue: IEX-1220: Update mock data for account balances endpoint

[gemini-code-assist]

Summary of Changes

Hello @glad-adyen, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request significantly refactors the handling of account balances by introducing a dedicated useAccountBalances hook. This change centralizes the data fetching and processing logic, making the <Balances /> component cleaner and more maintainable. It also prepares the system for displaying reserved balance amounts by updating mock data and API type definitions, ensuring consistency and future expandability.

Highlights

• New useAccountBalances Hook: Introduced a new custom hook, useAccountBalances, to centralize and encapsulate all logic related to fetching, processing, and managing account balances, including available and reserved values, and loading states.
• Refactored <Balances /> Component: The <Balances /> component has been updated to utilize the new useAccountBalances hook, significantly simplifying its internal logic by removing direct data fetching and state management concerns.
• Mock Data and Type Definition Updates: Mock data for balances (mocks/mock-data/balances.ts) now includes a reservedValue field, and the IBalance interface in src/types/api/resources/BalanceAccountsResource.ts has been extended to support this new property.
• Simplified useBalanceAccountSelection Hook: The useBalanceAccountSelection hook has been refactored to remove analytics context and related state management, streamlining its functionality.

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[gemini-code-assist]

Code Review

This pull request introduces a new useAccountBalances hook to encapsulate the logic for fetching account balances, which is a great improvement for code organization and reusability. The Balances component is refactored to use this new hook, and mock data is updated to include reserved balances. My review includes a few points to improve the implementation. In Balances.tsx, there's an issue with using non-stable keys for list items, and the reservedValue for balances seems to be dropped, preventing it from being displayed. Additionally, the new useAccountBalances hook is missing unit tests, and some analytics tracking logic has been removed in useBalanceAccountSelection.ts, which might be unintentional. Overall, the changes are positive, and addressing these points will make the PR even better.