refactor: Use shared Avatar component in ComparisonTable for UI consistency #240

src/features/comparison/components/comparison-table.tsx currently imports Next.js Image directly and applies custom ring/rounding styles rather than utilizing the shared Avatar component (@/components/layout/avatar).

Motivation

Using domain-agnostic shared components ensures consistent fallback behavior, image optimization, and unified styling across all pages.

Tasks

• Replace next/image in ComparisonTable with Avatar from @/components/layout/avatar.
• Match avatar sizing with other comparison views.
• Verify image fallback behavior when user avatar fails to load.
• Run npx tsc --noEmit and pnpm lint.