refactor(web): use compact prop for inline mini-abacus

Replace manual customStyles with compact={true} in AbacusTarget.tsx.

Before: 7 props + customStyles override
After: compact={true} automatically handles frame visibility

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

apps/web/src/app/arcade/complement-race/components/AbacusTarget.tsx

@@ -23,13 +23,11 @@ export function AbacusTarget({ number }: AbacusTargetProps) {
       <AbacusReact
         value={number}
         columns={1}
+        compact={true}
         interactive={false}
         showNumbers={false}
         hideInactiveBeads={true}
         scaleFactor={0.72}
-        customStyles={{
-          columnPosts: { opacity: 0 },
-        }}
       />
     </div>
   )