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/admin/src/views/matches/MatchEventEditor.vue

@@ -16,11 +16,23 @@ import {
 } from '../match-form';
 import AdminSubNav from '../../components/AdminSubNav.vue';
 
+const props = withDefaults(
+  defineProps<{
+    matchIdProp?: string;
+    embedded?: boolean;
+  }>(),
+  { embedded: false },
+);
+
+const emit = defineEmits<{
+  saved: [];
+}>();
+
 const route = useRoute();
 const router = useRouter();
 const { t } = useAdminLocale();
 
-const matchId = computed(() => String(route.params.matchId ?? ''));
+const matchId = computed(() => props.matchIdProp ?? String(route.params.matchId ?? ''));
 const loading = ref(false);
 const savingMeta = ref(false);
 const status = ref('DRAFT');
@@ -52,7 +64,7 @@ async function load() {
     const detail = data.data as AdminMatchDetail;
     if (detail.isOutright) {
       ElMessage.warning(t('msg.outright_no_edit'));
-      router.replace('/matches');
+      if (!props.embedded) router.replace('/matches');
       return;
     }
     status.value = detail.status;
@@ -81,7 +93,8 @@ async function saveMeta() {
   try {
     await api.put(`/admin/matches/${matchId.value}`, payload);
     ElMessage.success(t('msg.saved'));
-    await load();
+    emit('saved');
+    if (!props.embedded) await load();
   } catch (e: unknown) {
     const err = e as { response?: { data?: { error?: string } } };
     ElMessage.error(err.response?.data?.error ?? t('msg.save_failed'));
@@ -92,8 +105,13 @@ async function saveMeta() {
 </script>
 
 <template>
-  <div v-loading="loading" class="match-editor-page page-scroll">
+  <div
+    v-loading="loading"
+    class="match-editor-page"
+    :class="{ 'match-editor-page--embedded': embedded, 'page-scroll': !embedded }"
+  >
     <AdminSubNav
+      v-if="!embedded"
       :title="t('matchEditor.title')"
       :subtitle="`#${matchId}`"
     >
@@ -257,6 +275,12 @@ async function saveMeta() {
   color: var(--text);
 }
 
+.match-editor-page--embedded {
+  padding-bottom: 0;
+  max-height: min(78vh, 880px);
+  overflow-y: auto;
+}
+
 .panel {
   background: #ffffff;
   border: 1px solid var(--border);