fix(client,testing,build): improve TypeScript compatibility for DNS client parsing and test suite

test/test.fixes.simple.ts

@@ -1,12 +1,14 @@
 import * as plugins from '../ts_server/plugins.js';
 import { expect, tap } from '@git.zone/tstest/tapbundle';
-import { tapNodeTools } from '@git.zone/tstest/tapbundle_serverside';
+import { TapNodeTools } from '@git.zone/tstest/tapbundle_serverside';
 import * as dnsPacket from 'dns-packet';
 import * as dgram from 'dgram';
 
 import * as smartdns from '../ts_server/index.js';
 
-let dnsServer: smartdns.DnsServer;
+const tapNodeTools = new TapNodeTools(tap);
+
+let dnsServer: smartdns.DnsServer | null;
 
 // Port management for tests
 let nextHttpsPort = 8600;
@@ -29,7 +31,7 @@ async function stopServer(server: smartdns.DnsServer | null | undefined) {
   try {
     await server.stop();
   } catch (e) {
-    console.log('Handled error when stopping server:', e.message || e);
+    console.log('Handled error when stopping server:', e instanceof Error ? e.message : e);
   }
 }
 
@@ -85,7 +87,7 @@ tap.test('SOA records should be returned for non-existent domains', async () =>
   const dnsResponse = await responsePromise;
   
   console.log('✅ SOA response received');
-  const soaAnswers = dnsResponse.answers.filter(a => a.type === 'SOA');
+  const soaAnswers = dnsResponse.answers!.filter(a => a.type === 'SOA');
   expect(soaAnswers.length).toEqual(1);
   
   const soaData = (soaAnswers[0] as any).data;
@@ -151,7 +153,7 @@ tap.test('Primary nameserver should be configurable', async () => {
   
   const dnsResponse = await responsePromise;
   
-  const soaAnswers = dnsResponse.answers.filter(a => a.type === 'SOA');
+  const soaAnswers = dnsResponse.answers!.filter(a => a.type === 'SOA');
   expect(soaAnswers.length).toEqual(1);
   
   const soaData = (soaAnswers[0] as any).data;
@@ -215,7 +217,7 @@ tap.test('Default primary nameserver with FQDN', async () => {
   
   const dnsResponse = await responsePromise;
   
-  const soaAnswers = dnsResponse.answers.filter(a => a.type === 'SOA');
+  const soaAnswers = dnsResponse.answers!.filter(a => a.type === 'SOA');
   const soaData = (soaAnswers[0] as any).data;
   console.log('✅ FQDN primary nameserver:', soaData.mname);
   
@@ -225,4 +227,4 @@ tap.test('Default primary nameserver with FQDN', async () => {
   dnsServer = null;
 });
 
-export default tap.start();
+export default tap.start();