Fix new Frontend 17

frontend/src/api/services/forecasting.service.ts

@@ -22,16 +22,44 @@ export class ForecastingService {
    * Create Single Product Forecast
    */
   async createSingleForecast(
-    tenantId: string,
-    request: SingleForecastRequest
-  ): Promise<ForecastResponse[]> {
-    return apiClient.post(
-      `/tenants/${tenantId}/forecasts/single`,
-      request,
-      {
-        timeout: RequestTimeouts.MEDIUM,
+      tenantId: string,
+      request: SingleForecastRequest
+    ): Promise<ForecastResponse[]> {
+      console.log('🔮 Creating single forecast:', { tenantId, request });
+      
+      try {
+        // Backend returns single ForecastResponse object
+        const response = await apiClient.post(
+          `/tenants/${tenantId}/forecasts/single`,
+          request,
+          {
+            timeout: RequestTimeouts.MEDIUM,
+          }
+        );
+        
+        console.log('🔮 Forecast API Response:', response);
+        console.log('- Type:', typeof response);
+        console.log('- Is Array:', Array.isArray(response));
+        
+        // ✅ FIX: Convert single response to array
+        if (response && typeof response === 'object' && !Array.isArray(response)) {
+          // Single forecast response - wrap in array
+          const forecastArray = [response as ForecastResponse];
+          console.log('✅ Converted single forecast to array:', forecastArray);
+          return forecastArray;
+        } else if (Array.isArray(response)) {
+          // Already an array (unexpected but handle gracefully)
+          console.log('✅ Response is already an array:', response);
+          return response;
+        } else {
+          console.error('❌ Unexpected response format:', response);
+          throw new Error('Invalid forecast response format');
+        }
+        
+      } catch (error) {
+        console.error('❌ Forecast API Error:', error);
+        throw error;
       }
-    );
   }
 
   /**