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-onebot/action/extends/GetGroupShareLink.ts

@@ -0,0 +1,51 @@
+import { OneBotAction } from '@/snowcat-onebot/action/OneBotAction';
+import { ActionName } from '@/snowcat-onebot/action/router';
+import { Type, Static } from '@sinclair/typebox';
+
+const PayloadSchema = Type.Object({
+  group_id: Type.Union([Type.Number(), Type.String()], { description: '群号' }),
+  need_short_url: Type.Optional(Type.Union([Type.Boolean(), Type.String()], { default: true, description: '是否返回短链 (qm.qq.com/q/xxx)，false 返回完整 universal-share 链接' })),
+  src_id: Type.Optional(Type.Union([Type.Number(), Type.String()], { default: 73, description: '分享来源 ID' })),
+  additional_param: Type.Optional(Type.String({ default: '', description: '附加参数' })),
+});
+
+type PayloadType = Static<typeof PayloadSchema>;
+
+const ReturnSchema = Type.Object({
+  url: Type.String({ description: '群分享链接' }),
+}, { description: '群分享链接' });
+
+type ReturnType = Static<typeof ReturnSchema>;
+
+export class GetGroupShareLink extends OneBotAction<PayloadType, ReturnType> {
+  override actionName = ActionName.GetGroupShareLink;
+  override actionSummary = '获取群分享链接';
+  override actionDescription = '通过 NTQQ 原生 getJoinGroupLink 获取群的 H5 分享/加群链接 (qm.qq.com/q/xxx 或 qun.qq.com/universal-share/share?...)';
+  override actionTags = ['群组扩展'];
+  override payloadExample = {
+    group_id: '123456',
+    need_short_url: true,
+  };
+
+  override returnExample = {
+    url: 'https://qm.qq.com/q/xxxxxxxxxx',
+  };
+
+  override payloadSchema = PayloadSchema;
+  override returnSchema = ReturnSchema;
+
+  async _handle (payload: PayloadType) {
+    const needShortUrl = payload.need_short_url === undefined ? true : payload.need_short_url.toString() === 'true';
+    const srcId = payload.src_id === undefined ? 73 : Number(payload.src_id);
+    const ret = await this.core.apis.GroupApi.getJoinGroupLink(
+      payload.group_id.toString(),
+      needShortUrl,
+      srcId,
+      payload.additional_param ?? ''
+    );
+    if (!ret?.url) {
+      throw new Error(`获取群分享链接失败: ${ret?.errMsg || JSON.stringify(ret)}`);
+    }
+    return { url: ret.url };
+  }
+}