fix: 修复设置表单值时合并子对象的错误 (#6780)

Co-authored-by: shier <shier@shierd.com>

packages/@core/ui-kit/form-ui/src/form-api.ts

@@ -342,7 +342,7 @@ export class FormApi {
           isObject(obj[key]) &&
           !isDayjsObject(obj[key]) &&
           !isDate(obj[key])
-            ? fieldMergeFn(obj[key], value)
+            ? fieldMergeFn(value, obj[key])
             : value;
       }
       return true;