fix(frontend): resolve ESLint v10 lint errors blocking dependabot PR #4866

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## Describe the bug

Dependabot PR #4866 bumps @eslint/js from 9.39.4 to 10.0.1. ESLint v10 introduces two new rules that are now failing lint:

- no-useless-assignment in src/components/SkeletonsBase.tsx
- preserve-caught-error in src/hooks/useLogout.ts

These need to be fixed for the PR to pass CI.
References: #4866

## Are you going to work on fixing this?
- [X] Yes
- [ ] No