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/BannerCarousel.vue

@@ -1,6 +1,9 @@
 <script setup lang="ts">
 import { ref, onMounted, onUnmounted, watch } from 'vue';
 import { useRouter } from 'vue-router';
+import { useI18n } from 'vue-i18n';
+
+const { t } = useI18n();
 import defaultBannerImg from '../assets/images/banner.png';
 
 export interface BannerItem {
@@ -31,7 +34,7 @@ function onImgError(e: Event) {
 }
 
 function title(banner: BannerItem) {
-  return banner.translation?.title || 'Banner';
+  return banner.translation?.title || t('home.banner_fallback');
 }
 
 function goTo(index: number) {
@@ -130,8 +133,8 @@ onUnmounted(stopAutoPlay);
         </div>
       </div>
 
-      <button v-if="banners.length > 1" class="nav prev" type="button" aria-label="上一张" @click.stop="prev">‹</button>
-      <button v-if="banners.length > 1" class="nav next" type="button" aria-label="下一张" @click.stop="next">›</button>
+      <button v-if="banners.length > 1" class="nav prev" type="button" :aria-label="t('home.banner_prev')" @click.stop="prev">‹</button>
+      <button v-if="banners.length > 1" class="nav next" type="button" :aria-label="t('home.banner_next')" @click.stop="next">›</button>
 
       <div v-if="banners.length > 1" class="dots">
         <button
@@ -140,7 +143,7 @@ onUnmounted(stopAutoPlay);
           type="button"
           class="dot"
           :class="{ active: i === active }"
-          :aria-label="`第 ${i + 1} 张`"
+          :aria-label="t('home.banner_slide', { n: i + 1 })"
           @click.stop="goTo(i)"
         />
       </div>