chore: tidy up codebase and enforce linting and formatting standards

[nick-popovic]

Summary

The codebase requires an audit to ensure it fully adheres to the engineering standards and testing conventions defined in GEMINI.md. This includes verifying test isolation practices, consistent code styling, and project-wide type safety.

Areas of Focus

• Test Environment Isolation: Identify test files that may be directly manipulating process.env instead of using the recommended Vitest vi.stubEnv methods.
• Styling and Linting: Audit the repository for any linting or formatting violations that deviate from the project's ESLint and Prettier configurations.
• Type Integrity: Ensure all packages within the monorepo pass comprehensive type checking.

Rationale

Regularly aligning the codebase with established standards prevents technical debt, reduces test flakiness, and ensures a consistent development experience across the repository.