SnowCat 雪猫底层全源码：NapCat 4.18.28 底座 + SnowLuma 能力移植 + V8 通道适配 9.9.37

26 包 monorepo（TS 全源码）：
- snowcat-core: NT 内核 API 封装 + listener（含 9.9.37 六回调适配）+ Packet 发包
- snowcat-onebot: OneBot v11 全动作 + MCP Streamable HTTP 适配器 + 稳定线
- snowcat-webui-frontend/backend: 雪猫控制台（React+HeroUI）
- snowcat-shell: 单文件 bundle 出口（vite inlineDynamicImports）
- snowcat-native: napi2native / MoeHoo / ffmpeg / pty 运行时
- 56 项 SnowLuma 独门动作移植（qzone 全家桶/群相册/装扮/闪照/收藏）
- 工具件: 解包器/启动器/便携制作器/doctor

GitHub 关联已全量指向 DandanLLab/SnowCatQQ

packages/snowcat-dpapi/index.ts

@@ -0,0 +1,65 @@
+/**
+ * snowcat-dpapi - Windows DPAPI wrapper
+ *
+ * Loads the native @primno+dpapi.node addon from the runtime
+ * native/dpapi/ directory using process.dlopen, consistent
+ * with how other native modules (ffmpeg, packet, pty) are loaded.
+ */
+
+import { fileURLToPath } from 'node:url';
+import path, { dirname } from 'node:path';
+
+export type DataProtectionScope = 'CurrentUser' | 'LocalMachine';
+
+export interface DpapiBindings {
+  protectData (dataToEncrypt: Uint8Array, optionalEntropy: Uint8Array | null, scope: DataProtectionScope): Uint8Array;
+  unprotectData (encryptData: Uint8Array, optionalEntropy: Uint8Array | null, scope: DataProtectionScope): Uint8Array;
+}
+
+let dpapiBindings: DpapiBindings | null = null;
+let loadError: Error | null = null;
+
+function getAddonPath (): string {
+  // At runtime, import.meta.url resolves to dist/ directory.
+  // Native files are at dist/native/dpapi/{platform}-{arch}/@primno+dpapi.node
+  const importDir = dirname(fileURLToPath(import.meta.url));
+  const platform = process.platform; // 'win32'
+  const arch = process.arch; // 'x64' or 'arm64'
+  return path.join(importDir, 'native', 'dpapi', `${platform}-${arch}`, '@primno+dpapi.node');
+}
+
+function loadDpapi (): DpapiBindings {
+  if (dpapiBindings) {
+    return dpapiBindings;
+  }
+  if (loadError) {
+    throw loadError;
+  }
+  try {
+    const addonPath = getAddonPath();
+    const nativeModule: { exports: DpapiBindings } = { exports: {} as DpapiBindings };
+    process.dlopen(nativeModule, addonPath);
+    dpapiBindings = nativeModule.exports;
+    return dpapiBindings;
+  } catch (e) {
+    loadError = e as Error;
+    throw new Error(`Failed to load DPAPI native addon: ${(e as Error).message}`);
+  }
+}
+
+export const isPlatformSupported = process.platform === 'win32';
+
+export function protectData (data: Uint8Array, optionalEntropy: Uint8Array | null, scope: DataProtectionScope): Uint8Array {
+  return loadDpapi().protectData(data, optionalEntropy, scope);
+}
+
+export function unprotectData (data: Uint8Array, optionalEntropy: Uint8Array | null, scope: DataProtectionScope): Uint8Array {
+  return loadDpapi().unprotectData(data, optionalEntropy, scope);
+}
+
+export const Dpapi = {
+  protectData,
+  unprotectData,
+};
+
+export default Dpapi;