fix: fixing searchable key

Author: binaryk

src/Filters/SearchablesCollection.php

@@ -28,17 +28,18 @@ public function __construct($items = [])
             } elseif ($searchable instanceof Filter) {
                 // Other Filter instance - keep it
                 $unified[] = $searchable;
-            } elseif (is_string($searchable)) {
-                // String column name (including string callables like "MyClass::method")
-                $filter = new SearchableFilter;
-                $filter->setColumn($searchable);
-                $unified[] = $filter;
             } elseif (is_string($key) && ! is_numeric($key)) {
                 // Array key is the field name
                 $filter = new SearchableFilter;
                 $filter->setColumn($key);
                 $unified[] = $filter;
-            } elseif (is_callable($searchable)) {
+            } elseif (is_string($searchable)) {
+                // String column name (including string callables like "MyClass::method")
+                $filter = new SearchableFilter;
+                $filter->setColumn($searchable);
+                $unified[] = $filter;
+            }
+            elseif (is_callable($searchable)) {
                 // Non-string callables (closures, arrays, invokables)
                 $filter = new SearchableFilter;
                 $filter->usingClosure($searchable);