Fix Wren API endpoint URL

Changed from non-existent api.wren.co to correct www.wren.co
Changed endpoint path from offset_orders to offset-orders (hyphen not underscore)

Correct endpoints:
- POST https://www.wren.co/api/offset-orders
- GET https://www.wren.co/api/offset-orders/:id

server/utils/wrenClient.js

@@ -1,6 +1,6 @@
 import axios from 'axios';
 
-const WREN_API_BASE_URL = 'https://api.wren.co/v1';
+const WREN_API_BASE_URL = 'https://www.wren.co/api';
 
 /**
  * Create a carbon offset order via Wren Climate API
@@ -45,7 +45,7 @@ export async function createWrenOffsetOrder({
 
   try {
     const response = await axios.post(
-      `${WREN_API_BASE_URL}/offset_orders`,
+      `${WREN_API_BASE_URL}/offset-orders`,
       {
         tons: parseFloat(tons),
         portfolio: portfolioId,
@@ -111,7 +111,7 @@ export async function getWrenOffsetOrder(orderId) {
 
   try {
     const response = await axios.get(
-      `${WREN_API_BASE_URL}/offset_orders/${orderId}`,
+      `${WREN_API_BASE_URL}/offset-orders/${orderId}`,
       {
         headers: {
           'Authorization': `Bearer ${apiToken}`,