improvent for invites

includes/admin/admin-backend/routes/diagnostics.js

@@ -8,6 +8,7 @@ const { trackRequest, trackRequestWithTiming } = require('../../../maintenance/m
 const { createErrorResponse } = require('../../../infrastructure/error_handler');
 
 const execAsync = promisify(exec);
+const { state } = require('../../../infrastructure/state');
 
 async function handleDiagnosticsRoutes(req, res) {
   const urlPath = req.urlPath || new URL(req.url, `https://${req.headers.host}`).pathname;
@@ -502,6 +503,30 @@ async function handleDiagnosticsRoutes(req, res) {
     return true;
   }
 
+  // GET /api/diagnostics/invites
+  if (method === 'GET' && urlPath === '/api/diagnostics/invites') {
+    try {
+      if (!state.diagnoseInviteIssues) {
+        res.writeHead(503, { 'Content-Type': 'application/json' });
+        res.end(JSON.stringify({ error: 'Invite diagnostics not available - system not fully initialized' }));
+        trackRequest(urlPath, false);
+        return true;
+      }
+
+      const diagnostics = state.diagnoseInviteIssues();
+      res.writeHead(200, { 'Content-Type': 'application/json' });
+      res.end(JSON.stringify(diagnostics));
+      trackRequest(urlPath, true);
+      return true;
+    } catch (err) {
+      logError('DiagnosticsRoute', `Invite diagnostics error: ${err.message}`);
+      res.writeHead(500, { 'Content-Type': 'application/json' });
+      res.end(JSON.stringify({ error: err.message }));
+      trackRequest(urlPath, false);
+      return true;
+    }
+  }
+
   return false;
 }