feat(admin,player,api): 优胜冠军通用管理与界面精简

管理端新增冠军盘列表/编辑、展开懒加载与 ECharts 修复；各列表页去掉重复标题。玩家端支持多赛事冠军盘、分批加载与语言切换刷新。API 扩展 outright CRUD 与列表性能优化。

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

apps/admin/src/views/Cashback.vue

@@ -30,11 +30,6 @@ async function confirm() {
 
 <template>
   <div class="page-scroll">
-  <div class="page-header">
-    <h2 class="page-title">{{ t('page.cashback.title') }}</h2>
-    <span class="page-desc">{{ t('page.cashback.desc') }}</span>
-  </div>
-
   <el-card class="tool-card" shadow="never">
     <div class="filter-row">
       <el-form inline>
@@ -73,9 +68,6 @@ async function confirm() {
 </template>
 
 <style scoped>
-.page-header { display: flex; align-items: baseline; gap: 12px; margin-bottom: 20px; }
-.page-title  { font-size: 20px; font-weight: 700; color: #e0e0e0; }
-.page-desc   { font-size: 13px; color: #3a3a3a; }
 .tool-card   { margin-bottom: 16px; border-radius: 12px; }
 .preview-card { border-radius: 12px; }
 .preview-title { font-size: 15px; font-weight: 600; color: #e0e0e0; margin-bottom: 16px; }