- [x] Enhance safeResolvePath with stricter validation using filepath.Rel
- [x] Reject paths containing ".." after cleaning to prevent traversal
- [x] Validate absolute paths are within cwd when cwd is specified
- [x] Apply safeResolvePath validation to GetFileContent for consistency
- [x] Add comprehensive test coverage for path traversal protection
- [x] Fix allocation safety in getRecentSearchQueries by using constant capacity