- Change add_rule parameter from Option<&String> to Option<&str> for better ergonomics
- Use iterator methods (flat_map, any) instead of manual loops and collections
- Collapse nested if conditions using let-else patterns
- Use format string interpolation instead of separate arguments
- Avoid unnecessary String allocations in label comparisons
- Update CLI code to use as_deref() for Option<String> to Option<&str> conversion
- Update all documentation examples and tests to match new API
- All functionality preserved; API is more idiomatic and efficient
- Replace Option::unwrap() with pattern matching in add_rule label check
- Handle home directory resolution failures with proper Error types
- Add directory creation in save() to ensure parent directories exist
- Replace chrono unwraps with ? operator for date calculations
- Use unwrap_or with sensible defaults for parsing edge cases
- Keep unwrap in test code where immediate failure is desired
- All existing functionality preserved; no API changes
- Add comprehensive test coverage for all Rules public methods
- Test both success and error paths with proper assertions
- Add PartialEq derive to EolAction to enable comparisons in tests
- Include edge cases like duplicate labels and nonexistent IDs
- Mark file system integration tests as ignore to avoid interference
