fix(SmartCertManager): Preserve certificate manager update callback during route updates

test/test.route-callback-simple.ts

@@ -0,0 +1,81 @@
+import { tap, expect } from '@git.zone/tstest/tapbundle';
+import { SmartProxy } from '../ts/index.js';
+
+tap.test('should set update routes callback on certificate manager', async () => {
+  // Create a simple proxy with a route requiring certificates
+  const proxy = new SmartProxy({
+    routes: [{
+      name: 'test-route',
+      match: {
+        ports: [8443],
+        domains: ['test.local']
+      },
+      action: {
+        type: 'forward',
+        target: { host: 'localhost', port: 3000 },
+        tls: {
+          mode: 'terminate',
+          certificate: 'auto',
+          acme: {
+            email: 'test@local.dev',
+            useProduction: false
+          }
+        }
+      }
+    }]
+  });
+  
+  // Mock createCertificateManager to track callback setting
+  let callbackSet = false;
+  const originalCreate = (proxy as any).createCertificateManager;
+  
+  (proxy as any).createCertificateManager = async function(...args: any[]) {
+    // Create the actual certificate manager
+    const certManager = await originalCreate.apply(this, args);
+    
+    // Track if setUpdateRoutesCallback was called
+    const originalSet = certManager.setUpdateRoutesCallback;
+    certManager.setUpdateRoutesCallback = function(callback: any) {
+      callbackSet = true;
+      return originalSet.call(this, callback);
+    };
+    
+    return certManager;
+  };
+  
+  await proxy.start();
+  
+  // The callback should have been set during initialization
+  expect(callbackSet).toEqual(true);
+  
+  // Reset tracking
+  callbackSet = false;
+  
+  // Update routes - this should recreate the certificate manager
+  await proxy.updateRoutes([{
+    name: 'new-route',
+    match: {
+      ports: [8444],
+      domains: ['new.local']
+    },
+    action: {
+      type: 'forward',
+      target: { host: 'localhost', port: 3001 },
+      tls: {
+        mode: 'terminate',
+        certificate: 'auto',
+        acme: {
+          email: 'test@local.dev',
+          useProduction: false
+        }
+      }
+    }
+  }]);
+  
+  // The callback should have been set again after update
+  expect(callbackSet).toEqual(true);
+  
+  await proxy.stop();
+});
+
+tap.start();