sonar: MAJOR — Extract nested ternary operations (4 instances)

SonarCloud Finding — S3358

4 nested ternary operations should be extracted into independent statements.

File	Line
`sites/promo/src/components/comparison.tsx`	458, 463
`sites/promo/src/components/news.tsx`	200
`server/components/StoreView.vue`	465

Extract ternaries into named variables or if/else blocks.

fix: resolve SonarCloud issues across codebase

Closed by #91. Fixed 2 of 4 instances:

✅ sites/promo/src/components/comparison.tsx:458,463 (extracted to renderValue() helper)
✅ sites/promo/src/components/news.tsx:200 (refactored to if/else)

Remaining: