refactor(ai): enhance item structure generation with schema validation
feat(ai): add token usage tracking and cost calculation
fix(ui): improve item card number formatting with locale support
docs(items): add documentation for item value separation
test(items): add tests for value field validation
Added vocation state and included it in query string builder, updated onFilter to accept a vocation parameter, improved grid layout with grid flow classes, normalized category names for consistent item icons, and refined stats mapping to handle type safety.