feat(i18n): 管理端与玩家端三语支持（中/英/马来语）

- 管理后台 adminT 文案库、结算与代理端页面、表单校验
- 玩家端 vue-i18n 补全首页/公告/串关与 ms 文案
- Element Plus ms 语言包与共享 locale 工具

apps/player/src/stores/auth.ts

@@ -4,7 +4,9 @@ import api from '../api';
 
 export const useAuthStore = defineStore('auth', () => {
   const token = ref(localStorage.getItem('token') || '');
-  const user = ref(JSON.parse(localStorage.getItem('user') || 'null'));
+  const user = ref<{ id?: string; username?: string; locale?: string } | null>(
+    JSON.parse(localStorage.getItem('user') || 'null'),
+  );
 
   async function login(username: string, password: string) {
     const { data } = await api.post('/player/auth/login', { username, password });

apps/player/src/stores/betSlip.ts

@@ -1,5 +1,11 @@
 import { defineStore } from 'pinia';
 import { ref, computed } from 'vue';
+import {
+  PARLAY_MIN_LEGS,
+  PARLAY_MAX_LEGS,
+  canSelectForParlay,
+  type ParlayRejectReason,
+} from '@thebet365/shared';
 
 export interface SlipItem {
   selectionId: string;
@@ -9,20 +15,30 @@ export interface SlipItem {
   selectionName: string;
   odds: number;
   marketType: string;
+  lineValue?: number | null;
+  allowParlay?: boolean;
 }
 
 export const useBetSlipStore = defineStore('betSlip', () => {
   const items = ref<SlipItem[]>([]);
   const stake = ref<number>(10);
   const mode = ref<'single' | 'parlay'>('single');
+  const lastParlayError = ref<ParlayRejectReason | 'MAX_LEGS' | null>(null);
 
   const count = computed(() => items.value.length);
-  const isParlay = computed(() => mode.value === 'parlay' && items.value.length >= 2);
+  const isParlay = computed(() => mode.value === 'parlay' && items.value.length >= PARLAY_MIN_LEGS);
+
+  function parseLineValue(v: number | string | null | undefined): number | null {
+    if (v == null || v === '') return null;
+    const n = typeof v === 'number' ? v : parseFloat(String(v));
+    return Number.isFinite(n) ? n : null;
+  }
 
   /** 球赛/详情页：仅单关，且投注单同时只能有 1 项 */
   function addItem(item: SlipItem) {
     if (mode.value === 'parlay') items.value = [];
     mode.value = 'single';
+    lastParlayError.value = null;
 
     const existing = items.value.findIndex(
       (i) => i.selectionId === item.selectionId,
@@ -35,27 +51,48 @@ export const useBetSlipStore = defineStore('betSlip', () => {
   }
 
   /** 串关页专用：跨场组合，同场只保留一个选项 */
-  function addParlayLeg(item: SlipItem) {
+  function addParlayLeg(item: SlipItem): ParlayRejectReason | 'MAX_LEGS' | null {
     if (mode.value === 'single') items.value = [];
     mode.value = 'parlay';
 
     const samePick = items.value.findIndex((i) => i.selectionId === item.selectionId);
     if (samePick >= 0) {
       items.value.splice(samePick, 1);
-      return;
+      lastParlayError.value = null;
+      return null;
     }
+
+    const check = canSelectForParlay({
+      marketType: item.marketType,
+      lineValue: parseLineValue(item.lineValue),
+      allowParlay: item.allowParlay,
+    });
+    if (!check.ok) {
+      lastParlayError.value = check.reason;
+      return check.reason;
+    }
+
+    if (items.value.length >= PARLAY_MAX_LEGS) {
+      lastParlayError.value = 'MAX_LEGS';
+      return 'MAX_LEGS';
+    }
+
     items.value = items.value.filter((i) => i.matchId !== item.matchId);
     items.value.push(item);
+    lastParlayError.value = null;
+    return null;
   }
 
   function removeItem(selectionId: string) {
     items.value = items.value.filter((i) => i.selectionId !== selectionId);
     if (!items.value.length) mode.value = 'single';
+    lastParlayError.value = null;
   }
 
   function clear() {
     items.value = [];
     mode.value = 'single';
+    lastParlayError.value = null;
   }
 
   const totalOdds = computed(() =>
@@ -64,7 +101,7 @@ export const useBetSlipStore = defineStore('betSlip', () => {
 
   const potentialReturn = computed(() => {
     if (!items.value.length) return 0;
-    if (mode.value === 'parlay' && items.value.length >= 2) {
+    if (mode.value === 'parlay' && items.value.length >= PARLAY_MIN_LEGS) {
       return stake.value * totalOdds.value;
     }
     return stake.value * items.value[0].odds;
@@ -75,6 +112,14 @@ export const useBetSlipStore = defineStore('betSlip', () => {
     return new Set(matchIds).size !== matchIds.length;
   });
 
+  const canPlaceParlay = computed(
+    () =>
+      mode.value === 'parlay' &&
+      items.value.length >= PARLAY_MIN_LEGS &&
+      items.value.length <= PARLAY_MAX_LEGS &&
+      !hasSameMatch.value,
+  );
+
   const drawerOpen = ref(false);
 
   function openDrawer() {
@@ -94,6 +139,8 @@ export const useBetSlipStore = defineStore('betSlip', () => {
     totalOdds,
     potentialReturn,
     hasSameMatch,
+    canPlaceParlay,
+    lastParlayError,
     drawerOpen,
     addItem,
     addParlayLeg,