feat: add Rybbit admin SSO entry

server/app.mjs

@@ -232,6 +232,21 @@ export function createAdminApp(services) {
     res.json({ url: `${baseUrl}/auth/memind?ticket=${encoded}.${signature}` });
   });
 
+  adminApi.get('/analytics/rybbit-sso', requireAdmin, async (_req, res) => {
+    const sharedSecret = process.env.MEMIND_RYBBIT_SSO_SECRET?.trim();
+    if (!sharedSecret) return res.status(503).json({ message: '未配置 Rybbit 单点登录密钥' });
+    const email = process.env.RYBBIT_SSO_EMAIL?.trim().toLowerCase();
+    if (!email) return res.status(503).json({ message: '未配置 Rybbit 单点登录账号' });
+    const baseUrl = String(process.env.RYBBIT_URL || 'https://rybbit.tkmind.cn').replace(/\/$/, '');
+    const encoded = Buffer.from(JSON.stringify({
+      email,
+      exp: Math.floor(Date.now() / 1000) + 60,
+      nonce: crypto.randomUUID(),
+    })).toString('base64url');
+    const signature = crypto.createHmac('sha256', sharedSecret).update(encoded).digest('base64url');
+    res.json({ url: `${baseUrl}/api/auth/memind?ticket=${encoded}.${signature}` });
+  });
+
   adminApi.get('/users', requireAdmin, async (req, res) => {
     const result = await userAuth.listUsers({
       page: Number(req.query.page) || 1,