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/layouts/ManageLayout.vue

@@ -129,7 +129,7 @@ const currentLabel = computed(() => {
   return hit?.label ?? '';
 });
 
-const topbarCrumbs = computed(() => resolveAdminBreadcrumb(route.path, t));
+const topbarCrumbs = computed(() => resolveAdminBreadcrumb(route.path, t, route.query));
 
 const roleLabel = computed(() => {
   if (auth.isAdmin.value) {
@@ -303,9 +303,9 @@ watch(() => route.path, () => {
         </div>
       </header>
       <main class="page-main">
-        <RouterView v-slot="{ Component }">
+        <RouterView v-slot="{ Component, route: layoutRoute }">
           <KeepAlive :max="10" :include="keepAliveIncludes">
-            <component :is="Component" />
+            <component :is="Component" :key="layoutRoute.matched[1]?.path ?? layoutRoute.path" />
           </KeepAlive>
         </RouterView>
       </main>