refactor(testing): add ApplicationContract and Router type hints

Add proper type hints following existing codebase conventions:
- Use `ApplicationContract` alias for contract type hints
- Use `Router` type hints for route definition methods
- Update all contracts, attributes, traits, and test files

This improves type safety while maintaining consistency with the
existing codebase pattern where 20+ files use the ApplicationContract
alias convention.

refactor(testing): add ApplicationContract and Router type hints

Add proper type hints following existing codebase conventions:
- Use `ApplicationContract` alias for contract type hints
- Use `Router` type hints for route definition methods
- Update all contracts, attributes, traits, and test files

This improves type safety while maintaining consistency with the
existing codebase pattern where 20+ files use the ApplicationContract
alias convention.

refactor(testing): add ApplicationContract and Router type hints

Add proper type hints following existing codebase conventions:
- Use `ApplicationContract` alias for contract type hints
- Use `Router` type hints for route definition methods
- Update all contracts, attributes, traits, and test files

This improves type safety while maintaining consistency with the
existing codebase pattern where 20+ files use the ApplicationContract
alias convention.

refactor(testing): add ApplicationContract and Router type hints

Add proper type hints following existing codebase conventions:
- Use `ApplicationContract` alias for contract type hints
- Use `Router` type hints for route definition methods
- Update all contracts, attributes, traits, and test files

This improves type safety while maintaining consistency with the
existing codebase pattern where 20+ files use the ApplicationContract
alias convention.

refactor(testing): add ApplicationContract and Router type hints

Add proper type hints following existing codebase conventions:
- Use `ApplicationContract` alias for contract type hints
- Use `Router` type hints for route definition methods
- Update all contracts, attributes, traits, and test files

This improves type safety while maintaining consistency with the
existing codebase pattern where 20+ files use the ApplicationContract
alias convention.

refactor(testing): add ApplicationContract and Router type hints

Add proper type hints following existing codebase conventions:
- Use `ApplicationContract` alias for contract type hints
- Use `Router` type hints for route definition methods
- Update all contracts, attributes, traits, and test files

This improves type safety while maintaining consistency with the
existing codebase pattern where 20+ files use the ApplicationContract
alias convention.

refactor(testing): add ApplicationContract and Router type hints

Add proper type hints following existing codebase conventions:
- Use `ApplicationContract` alias for contract type hints
- Use `Router` type hints for route definition methods
- Update all contracts, attributes, traits, and test files

This improves type safety while maintaining consistency with the
existing codebase pattern where 20+ files use the ApplicationContract
alias convention.

refactor(testing): add ApplicationContract and Router type hints

Add proper type hints following existing codebase conventions:
- Use `ApplicationContract` alias for contract type hints
- Use `Router` type hints for route definition methods
- Update all contracts, attributes, traits, and test files

This improves type safety while maintaining consistency with the
existing codebase pattern where 20+ files use the ApplicationContract
alias convention.

refactor(testing): add ApplicationContract and Router type hints

Add proper type hints following existing codebase conventions:
- Use `ApplicationContract` alias for contract type hints
- Use `Router` type hints for route definition methods
- Update all contracts, attributes, traits, and test files

This improves type safety while maintaining consistency with the
existing codebase pattern where 20+ files use the ApplicationContract
alias convention.

Merge branch 'main' into feature/horizon