rate limiting

frontend/src/services/api.js

@@ -13,6 +13,24 @@ const apiClient = axios.create({
   },
 });
 
+// Rate limiting - simple queue to prevent excessive requests
+let lastRequestTime = 0;
+const MIN_REQUEST_INTERVAL = 100; // 100ms between requests
+
+// Add rate limiting interceptor
+apiClient.interceptors.request.use(async (config) => {
+  const now = Date.now();
+  const timeSinceLastRequest = now - lastRequestTime;
+  
+  if (timeSinceLastRequest < MIN_REQUEST_INTERVAL) {
+    const delay = MIN_REQUEST_INTERVAL - timeSinceLastRequest;
+    await new Promise(resolve => setTimeout(resolve, delay));
+  }
+  
+  lastRequestTime = Date.now();
+  return config;
+});
+
 // Request interceptor to add auth token
 apiClient.interceptors.request.use(
   (config) => {