新增根据帧数控制可见性

client/core/library/OnlineResourceLibraryProvider.h

@@ -0,0 +1,16 @@
+#pragma once
+
+#include "library/ResourceLibraryProvider.h"
+
+namespace core::library {
+
+/// 在线资源库（预留）：当前不做真实网络请求，仅提供接口占位。
+class OnlineResourceLibraryProvider final : public ResourceLibraryProvider {
+    Q_OBJECT
+public:
+    explicit OnlineResourceLibraryProvider(QObject* parent = nullptr);
+    void fetchResourcesAsync() override;
+};
+
+}  // namespace core::library
+