Refactor client initialization logic to use a generic lazy-loaded method

[cypherpepe]

Replaced individual client initializations with a getClient method that lazily loads and stores clients in a single object. This reduces code duplication and simplifies the management of client instances.

Description

This PR refactors the client initialization logic by introducing a getClient method that lazily loads and caches clients in a single object. The previous approach initialized each client separately, leading to duplicated code and less maintainability. The new method reduces redundancy and makes the code more modular and easier to extend.

Test Plan

1. Ensure that lazy initialization occurs without errors and that subsequent calls retrieve the cached instance.
2. Confirm that client functionality is not impacted by the refactoring using both wallet and account configurations.

Related Issue

No related issue. This is an internal refactoring to improve code structure.

Notes

No additional front-end or navigation changes required.