[_]: feat/migrate-to-vitest-2

[larryrider]

• Updated all model files to replace direct property declarations with 'declare' keyword for better TypeScript compatibility.
• Ensured all model attributes are explicitly declared with their respective data types.
• Fixed some import errors from yarn build

This change enhances type safety and aligns with TypeScript best practices across the codebase.

[github-actions]

This PR is stale because it has been open for more than 15 days with no activity.