fix: correct API client initialization for test connection

- Fix apiClients object access (use bracket notation, not .get())
- Initialize apiClients as plain objects, not Maps, for consistency
- This fixes the "apiClients.get is not a function" error when testing connections

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

server/configApi.js

@@ -100,7 +100,7 @@ class ConfigApi {
             const { apiClients, pbsApiClients } = await initializeApiClients(testEndpoints, testPbsConfigs);
             
             // Try a simple API call to verify connection
-            const testClient = apiClients.get('test-primary');
+            const testClient = apiClients['test-primary'];
             if (testClient) {
                 await testClient.client.get('/nodes');
             }

server/index.js

@@ -978,8 +978,8 @@ async function startServer() {
     } else {
         console.log("INFO: No endpoints configured. Starting in setup mode.");
         // Initialize empty clients for consistency
-        apiClients = new Map();
-        pbsApiClients = new Map();
+        apiClients = {};
+        pbsApiClients = {};
         global.pulseApiClients = { apiClients, pbsApiClients };
     }