ticket implemented

frontend/src/lib/api.ts

@@ -50,9 +50,15 @@ export interface FindArticlesParams {
 export async function fetchArticles(params: FindArticlesParams = {}): Promise<ArticlesResponse> {
   console.log('fetchArticles called with params:', params, 'API_BASE_URL:', API_BASE_URL);
   const searchParams = new URLSearchParams();
+
+  // Convert parameters to proper types for URLSearchParams
   Object.entries(params).forEach(([key, value]) => {
-    if (value !== undefined) {
-      searchParams.append(key, String(value));
+    if (value !== undefined && value !== null) {
+      if (typeof value === 'number') {
+        searchParams.append(key, value.toString());
+      } else {
+        searchParams.append(key, String(value));
+      }
     }
   });