CompareBar: bump fraction badge to large (32px)

Badge: medium (26px) → large (32px) — matches the visual weight of
the now-body1 status text and medium Compare button. Badge atom's
large variant uses the --fa-badge-*-lg tokens (height 32px, font-size
and icon-size stepped up together).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/components/molecules/CompareBar/CompareBar.tsx

@@ -75,7 +75,7 @@ export const CompareBar = React.forwardRef<HTMLDivElement, CompareBarProps>(
           ]}
         >
           {/* Fraction badge — 1/3, 2/3, 3/3 */}
-          <Badge color="brand" variant="soft" size="medium" sx={{ flexShrink: 0 }}>
+          <Badge color="brand" variant="soft" size="large" sx={{ flexShrink: 0 }}>
             {count}/3
           </Badge>