[grade=B] feat(auth): onboard missing credentials into encrypted vault

dashcaddy-api/routes/auth/totp.js

@@ -15,7 +15,7 @@ const { ok, successMessage } = require('../../src/utils/responses');
  * @param {Object} deps.log - Logger instance
  * @returns {express.Router}
  */
-module.exports = function({ authManager, credentialManager, totpConfig, saveTotpConfig, session, asyncHandler, errorResponse, log, renewCSRFToken }) {
+module.exports = function({ authManager, credentialManager, totpConfig, saveTotpConfig, session, asyncHandler, errorResponse, log, renewCSRFToken, siteConfig }) {
   const router = express.Router();
   
   // Ctx shim for backward compatibility
@@ -23,7 +23,8 @@ module.exports = function({ authManager, credentialManager, totpConfig, saveTotp
     credentialManager,
     totpConfig,
     saveTotpConfig,
-    session
+    session,
+    siteConfig
   };
 
   // Get current TOTP config (public route)
@@ -193,11 +194,14 @@ const SETUP_WINDOW_MS = 60 * 60 * 1000;
   // Login: verify TOTP code and set session cookie
   router.post('/totp/verify', asyncHandler(async (req, res) => {
     const { authenticator } = require('otplib');
-    const { code } = req.body;
+    const { code, serviceId } = req.body;
 
     if (!code || !/^\d{6}$/.test(code)) {
       throw new ValidationError('Invalid code format', 'code');
     }
+    if (serviceId != null && !/^[a-z0-9][a-z0-9-]*$/.test(String(serviceId))) {
+      throw new ValidationError('Invalid service ID', 'serviceId');
+    }
 
     if (!ctx.totpConfig.enabled || !ctx.totpConfig.isSetUp) {
       throw new ValidationError('TOTP is not enabled');
@@ -227,7 +231,12 @@ const SETUP_WINDOW_MS = 60 * 60 * 1000;
     // URL when bouncing the user back to a gated service. That service's
     // login page exchanges it via /auth/sso-exchange for its own host-only
     // session cookie. Single-use, 60s TTL — see ctx.session.createHandoffToken.
-    const ssoToken = ctx.session.createHandoffToken();
+    let ssoToken = null;
+    if (serviceId) {
+      const suffix = String(ctx.siteConfig?.tld || '.sami');
+      const expectedHost = `${serviceId}${suffix.startsWith('.') ? suffix : `.${suffix}`}`;
+      ssoToken = ctx.session.createHandoffToken(expectedHost);
+    }
 
     log.debug('auth', 'Session created', { sessions: ctx.session.ipSessions.size });
     ok(res, { message: 'Authenticated successfully', sessionDuration: ctx.totpConfig.sessionDuration, csrfToken: newCsrfToken, ssoToken });