feat: enhance lottery system with participant import and prize config

- Fix ES module import issue in admin.service.ts (require -> import)
- Fix lottery reveal ghosting by hiding name particles on complete
- Add participant import from Excel with tag calculation
- Add prize configuration service with JSON persistence
- Constrain winners overlay to scroll area dimensions
- Fix macOS lsof syntax in stop script
- Add HorseRace view and renderer (WIP)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

packages/client-screen/src/router/index.ts

@@ -51,6 +51,12 @@ const router = createRouter({
       component: () => import('../views/VoteResultsView.vue'),
       meta: { title: '年会大屏 - 投票结果' },
     },
+    {
+      path: '/screen/horse-race',
+      name: 'screen-horse-race',
+      component: () => import('../views/HorseRaceView.vue'),
+      meta: { title: '年会大屏 - 赛马热度' },
+    },
 
     // Legacy routes (redirect to new paths)
     { path: '/voting', redirect: '/screen/voting' },