- Change all \$derived(() => {...}) to \$derived.by(() => {...}) — values not functions
- Remove unused formatDayLabel import
- Delegate subScores to computeSubScores(), warnings to computeWarnings()
- Remove () call syntax from all template reactive references
Addresses Kai blockers: anti-pattern derived, dead import.
Addresses QA blocker: logic now exercised by unit tests in variety.ts.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>