feat(admin,api,player): 赛事分组管理、盘口独立页与多语言展示优化

- 管理端按联赛展示单场，新增赛事/单场流程与列表展开状态保持

- 盘口赔率迁至独立页面，保存按钮仅在有修改时高亮

- API 新增联赛列表与子场查询，按 locale 返回队名并修复编译

- 波胆其它选项与促销标签等 i18n 补齐，文案更易懂

apps/admin/src/utils/matchesListState.ts

@@ -0,0 +1,51 @@
+/** 赛事列表 UI 状态（返回列表时恢复展开等） */
+
+const STORAGE_KEY = 'admin_matches_list_ui';
+
+export type MatchesListUiState = {
+  expandedLeagueIds: string[];
+  page: number;
+  pageSize: number;
+  filterStatus: string;
+  keyword: string;
+};
+
+function defaultState(): MatchesListUiState {
+  return {
+    expandedLeagueIds: [],
+    page: 1,
+    pageSize: 10,
+    filterStatus: '',
+    keyword: '',
+  };
+}
+
+export function readMatchesListUiState(): MatchesListUiState | null {
+  try {
+    const raw = sessionStorage.getItem(STORAGE_KEY);
+    if (!raw) return null;
+    const parsed = JSON.parse(raw) as MatchesListUiState;
+    if (!Array.isArray(parsed.expandedLeagueIds)) return null;
+    return parsed;
+  } catch {
+    return null;
+  }
+}
+
+export function writeMatchesListUiState(state: MatchesListUiState) {
+  sessionStorage.setItem(STORAGE_KEY, JSON.stringify(state));
+}
+
+export function patchMatchesListUiState(patch: Partial<MatchesListUiState>) {
+  const base = readMatchesListUiState() ?? defaultState();
+  writeMatchesListUiState({ ...base, ...patch });
+}
+
+/** 从子页返回前确保该赛事行处于展开记录中 */
+export function ensureLeagueExpanded(leagueId: string) {
+  if (!leagueId) return;
+  const base = readMatchesListUiState() ?? defaultState();
+  const ids = new Set(base.expandedLeagueIds);
+  ids.add(leagueId);
+  writeMatchesListUiState({ ...base, expandedLeagueIds: [...ids] });
+}