feat: 世界杯48强夺冠盘、管理端调赔与项目文档

- 固定48强基准数据、同步种子与后台世界杯夺冠页

- 补全 user_preferences 迁移文件；新增启动指南与默认数据说明

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/admin/src/router/index.ts

@@ -26,6 +26,11 @@ const router = createRouter({
           component: () => import('../views/Matches.vue'),
           meta: { adminOnly: true },
         },
+        {
+          path: 'world-cup-outright',
+          component: () => import('../views/WorldCupOutright.vue'),
+          meta: { adminOnly: true },
+        },
         {
           path: 'bets',
           component: () => import('../views/Bets.vue'),