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-core/packet/utils/crypto/hash.ts

@@ -0,0 +1,47 @@
+// love from https://github.com/LagrangeDev/lagrangejs & https://github.com/takayama-lily/oicq
+import * as crypto from 'crypto';
+import * as stream from 'stream';
+import * as fs from 'fs';
+import { CalculateStreamBytesTransform } from '@/snowcat-core/packet/utils/crypto/sha1StreamBytesTransform';
+
+function sha1Stream (readable: stream.Readable) {
+  return new Promise<Buffer>((resolve, reject) => {
+    readable.on('error', reject);
+    readable.pipe(crypto.createHash('sha1').on('error', reject).on('data', resolve));
+  });
+}
+
+function md5Stream (readable: stream.Readable) {
+  return new Promise<Buffer>((resolve, reject) => {
+    readable.on('error', reject);
+    readable.pipe(crypto.createHash('md5').on('error', reject).on('data', resolve));
+  });
+}
+
+export function calculateSha1 (filePath: string): Promise<Buffer> {
+  const readable = fs.createReadStream(filePath);
+  return sha1Stream(readable);
+}
+
+export function computeMd5AndLengthWithLimit (filePath: string, limit?: number): Promise<Buffer> {
+  const readStream = fs.createReadStream(filePath, limit ? { start: 0, end: limit - 1 } : {});
+  return md5Stream(readStream);
+}
+
+export function calculateSha1StreamBytes (filePath: string): Promise<Buffer[]> {
+  return new Promise((resolve, reject) => {
+    const readable = fs.createReadStream(filePath);
+    const calculateStreamBytes = new CalculateStreamBytesTransform();
+    const byteArrayList: Buffer[] = [];
+    calculateStreamBytes.on('data', (chunk: Buffer) => {
+      byteArrayList.push(chunk);
+    });
+    calculateStreamBytes.on('end', () => {
+      resolve(byteArrayList);
+    });
+    calculateStreamBytes.on('error', (err: Error) => {
+      reject(err);
+    });
+    readable.pipe(calculateStreamBytes);
+  });
+}