feat: 前台匿名浏览、登录引导、客服入口与返水增强

前台：
- 未登录可浏览首页/赛事/赔率，下注等操作弹出登录引导（去登录/继续浏览）
- 顶部新增客服入口与 iframe 弹窗
- 登录页支持暂不登录返回浏览

API：
- 首页/赛事/冠军盘接口改为公开访问，支持 X-Locale 头
- JWT 守卫支持可选认证

返水：
- 注单新增 is_cashbacked 字段，发放时自动标记
- 预览展示玩家余额，明确平台直发不从代理扣款
- 后台注单列表与玩家历史展示回水状态

其他：
- 串关禁止同场重复选号（SAME_MATCH）
- 补充结算资金流分析文档

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

apps/player/src/views/MatchDetailView.vue

@@ -5,6 +5,7 @@ import { useI18n } from 'vue-i18n';
 import api from '../api';
 import { formatMoney } from '../utils/localeDisplay';
 import { useBetSlipStore } from '../stores/betSlip';
+import { useAuthStore } from '../stores/auth';
 import TeamEmblem from '../components/TeamEmblem.vue';
 import { DETAIL_MARKET_TYPES, MARKET_I18N_KEY } from '../utils/marketCatalog';
 import MatchBetGuide from '../components/match-detail/MatchBetGuide.vue';
@@ -26,6 +27,11 @@ const route = useRoute();
 const router = useRouter();
 const { t, locale } = useI18n();
 const slip = useBetSlipStore();
+const auth = useAuthStore();
+
+function goLogin() {
+  auth.showLoginPrompt(route.fullPath);
+}
 
 interface Market {
   id: string;
@@ -96,7 +102,7 @@ const myBets = ref<MyBet[]>([]);
 const loadingMyBets = ref(false);
 
 async function loadMyBets() {
-  if (!match.value) return;
+  if (!match.value || !auth.token) return;
   loadingMyBets.value = true;
   try {
     const { data } = await api.get('/player/bets?page=1');
@@ -241,6 +247,10 @@ async function confirmCorrectScoreBets() {
 
 async function placeCorrectScoreBets(marketType: string) {
   if (!bettingOpen.value) return;
+  if (!auth.token) {
+    goLogin();
+    return;
+  }
   const market = marketsByType.value.get(marketType);
   if (!market || !match.value) return;
   const entries = market.selections.filter((s) => (correctScoreStakes.value[s.id] ?? 0) > 0);
@@ -325,6 +335,10 @@ function onPickSelection(selId: string, marketType: string) {
 }
 
 function openBetSlipDrawer() {
+  if (!auth.token) {
+    goLogin();
+    return;
+  }
   slip.openDrawer();
 }