fix: also trigger auto Business Policy setup when policy list is empty (not just on 20403)

EbayListingTool/Services/EbayListingService.cs

@@ -112,9 +112,18 @@ public class EbayListingService
                 : null;
 
             if (_fulfillmentPolicyId == null)
+            {
+                if (!_triedPolicySetup)
+                {
+                    _triedPolicySetup = true;
+                    await SetupDefaultBusinessPoliciesAsync(token);
+                    await EnsurePoliciesAndLocationAsync(token, postcode);
+                    return;
+                }
                 throw new InvalidOperationException(
                     "No fulfillment policy found on your eBay account.\n\n" +
-                    "Please set one up in My eBay → Account → Business policies, then try again.");
+                    "Please set one up in My eBay \u2192 Account \u2192 Business policies, then try again.");
+            }
         }
 
         if (_paymentPolicyId == null)