fix onboarding bugs

app/ics/api/engine/retrieve_warehouse.php

@@ -17,6 +17,11 @@
         $answer['output'] = $wh->getWarehouseList($type, $sku, $id);
     }
 
-    $answer['success'] = 1;
+    if (empty($answer['output'])) {
+        $answer['success'] = 0;
+        $answer['message'] = 'No warehouse found. Please go to <b>Inventory → Warehouse</b> to create your first warehouse before using this page.';
+    } else {
+        $answer['success'] = 1;
+    }
     exit(json_encode($answer));
 ?>

app/ics/stock_overview.php

@@ -304,8 +304,7 @@
         });
         $('#warehouse').html(option);
 
-        // Auto-select first warehouse on page load
-        if (res.output && res.output.length > 0) {
+        if (res.output.length > 0) {
           $('#warehouse').val(res.output[0].id);
           retrieve_overview();
         }