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/components/BetSlipDrawer.vue

@@ -1,6 +1,7 @@
 <script setup lang="ts">
 import { ref, computed } from 'vue';
 import { useI18n } from 'vue-i18n';
+import { PARLAY_MIN_LEGS, PARLAY_MAX_LEGS } from '@thebet365/shared';
 import { useBetSlipStore } from '../stores/betSlip';
 import api from '../api';
 
@@ -29,11 +30,19 @@ async function placeBet() {
   success.value = '';
 
   try {
-    if (slip.mode === 'parlay' && slip.items.length >= 2) {
+    if (slip.mode === 'parlay' && slip.items.length >= PARLAY_MIN_LEGS) {
       if (slip.hasSameMatch) {
         error.value = t('bet.parlay_same_match');
         return;
       }
+      if (slip.items.length > PARLAY_MAX_LEGS) {
+        error.value = t('bet.parlay_max_legs');
+        return;
+      }
+      if (!slip.canPlaceParlay) {
+        error.value = t('bet.parlay_need_more');
+        return;
+      }
       await api.post('/player/bets/parlay', {
         legs: slip.items.map((i) => ({
           selectionId: i.selectionId,
@@ -110,7 +119,7 @@ async function placeBet() {
       <button
         type="button"
         class="btn-primary"
-        :disabled="loading || !slip.items.length"
+        :disabled="loading || !slip.items.length || (slip.mode === 'parlay' && !slip.canPlaceParlay)"
         @click="placeBet"
       >
         {{ loading ? t('bet.placing') : t('bet.place_bet') }}