Refactor/energy system (serialize-instruction-data-frontend.md)

[EmekaManuel]

Problem

• The code for fetching and managing player data had inconsistent use of .then() for handling promises.
• Error handling was not robust, leading to potential issues if data fetching or decoding fails.
• Account change subscription lacked proper cleanup, which could cause memory leaks.

Summary of Changes

• Refactored code to use async/await for consistency and readability.
• Added try/catch blocks for improved error handling when fetching and decoding player data.
• Created a separate async function for fetching player data to enhance code organization.
• Implemented error handling in the account change callback to handle decoding errors.
• Added cleanup logic for the account change subscription to prevent memory leaks.

[mikemaccana]

Thanks for these improvements @EmekaManuel ! I note you already have a PR for this content, see #348 - can you move these changes into that?

[EmekaManuel]

Thanks for these improvements @EmekaManuel ! I note you already have a PR for this content, see #348 - can you move these changes into that?

Done ✅