- Add 46 comprehensive tests for LinkUtils covering all methods
- Test parseWikilinks() with various formats, aliases, headings, paths
- Test resolveLink() with MetadataCache integration and edge cases
- Test findSuggestions() with scoring algorithms and fuzzy matching
- Test getBacklinks() with linked/unlinked mentions and snippet extraction
- Test validateWikilinks() with resolved/unresolved link validation
- Achieve 100% statement, function, and line coverage on link-utils.ts
