sync(theme-2): 同步 main 最新 API/Admin 与玩家端逻辑

从 main 同步站内信手动发送、媒体库选择、列表子路由重构等 API/Admin 改动；玩家端仅合并 ADMIN_CUSTOM 富文本、消息预览与充值截图压缩逻辑，保留 theme-2 样式。

apps/player/src/components/MessageListPanel.vue

@@ -6,6 +6,7 @@ import { formatLocalMatchDateTime } from '@thebet365/shared';
 import GoldSpinner from './GoldSpinner.vue';
 import ConfirmDialog from './ConfirmDialog.vue';
 import { useAuthStore } from '../stores/auth';
+import { stripHtml } from '../utils/html';
 import { usePlayerMessages, type DepositMessagePayload, type PlayerMessage } from '../composables/usePlayerMessages';
 
 const router = useRouter();
@@ -44,7 +45,8 @@ function messagePreview(item: PlayerMessage) {
     const deposit = item.payload as DepositMessagePayload | null;
     if (deposit?.orderNo) return deposit.orderNo;
   }
-  return item.body.length > 80 ? `${item.body.slice(0, 80)}…` : item.body;
+  const plain = stripHtml(item.body);
+  return plain.length > 80 ? `${plain.slice(0, 80)}…` : plain;
 }
 
 function openDetail(id: string) {