fix: 修复表单内按钮点击触发跳转问题

- 所有表单内的按钮添加 type="button" 属性
- 防止点击按钮触发表单提交导致页面跳转
- 修复：添加字段、添加子类别按钮在编辑弹框中的问题

templates/admin.html

@@ -1539,7 +1539,7 @@
                     <div class="border-t pt-4">
                         <div class="flex justify-between items-center mb-3">
                             <label class="text-sm font-medium text-gray-700"><i class="ri-list-settings-line mr-1"></i>参数字段管理</label>
-                            <button onclick="openFieldAddModal('category')" class="px-3 py-1.5 bg-indigo-600 text-white rounded-lg text-sm hover:bg-indigo-700">
+                            <button type="button" onclick="openFieldAddModal('category')" class="px-3 py-1.5 bg-indigo-600 text-white rounded-lg text-sm hover:bg-indigo-700">
                                 <i class="ri-add-line mr-1"></i>添加字段
                             </button>
                         </div>
@@ -1553,7 +1553,7 @@
                     <div class="border-t pt-4">
                         <div class="flex justify-between items-center mb-3">
                             <label class="text-sm font-medium text-gray-700"><i class="ri-folder-line mr-1"></i>子类别管理</label>
-                            <button onclick="openSubcategoryAddModal()" class="px-3 py-1.5 bg-green-600 text-white rounded-lg text-sm hover:bg-green-700">
+                            <button type="button" onclick="openSubcategoryAddModal()" class="px-3 py-1.5 bg-green-600 text-white rounded-lg text-sm hover:bg-green-700">
                                 <i class="ri-add-line mr-1"></i>添加子类别
                             </button>
                         </div>
@@ -1595,7 +1595,7 @@
                 <div class="border-t pt-4">
                     <div class="flex justify-between items-center mb-3">
                         <label class="text-sm font-medium text-gray-700"><i class="ri-list-settings-line mr-1"></i>参数字段管理（基础字段，所有子类别共享）</label>
-                        <button onclick="openFieldAddModal('category')" class="px-3 py-1.5 bg-indigo-600 text-white rounded-lg text-sm hover:bg-indigo-700">
+                        <button type="button" onclick="openFieldAddModal('category')" class="px-3 py-1.5 bg-indigo-600 text-white rounded-lg text-sm hover:bg-indigo-700">
                             <i class="ri-add-line mr-1"></i>添加字段
                         </button>
                     </div>
@@ -1609,7 +1609,7 @@
                 <div class="border-t pt-4">
                     <div class="flex justify-between items-center mb-3">
                         <label class="text-sm font-medium text-gray-700"><i class="ri-folder-line mr-1"></i>子类别管理</label>
-                        <button onclick="openSubcategoryAddModal()" class="px-3 py-1.5 bg-green-600 text-white rounded-lg text-sm hover:bg-green-700">
+                        <button type="button" onclick="openSubcategoryAddModal()" class="px-3 py-1.5 bg-green-600 text-white rounded-lg text-sm hover:bg-green-700">
                             <i class="ri-add-line mr-1"></i>添加子类别
                         </button>
                     </div>
@@ -1823,7 +1823,7 @@
                 <div class="border-t pt-4">
                     <div class="flex justify-between items-center mb-3">
                         <label class="text-sm font-medium text-gray-700"><i class="ri-list-settings-line mr-1"></i>额外参数字段（子类别特有，继承父类别字段）</label>
-                        <button onclick="openSubcategoryFieldAddModal()" class="px-3 py-1.5 bg-indigo-600 text-white rounded-lg text-sm hover:bg-indigo-700">
+                        <button type="button" onclick="openSubcategoryFieldAddModal()" class="px-3 py-1.5 bg-indigo-600 text-white rounded-lg text-sm hover:bg-indigo-700">
                             <i class="ri-add-line mr-1"></i>添加字段
                         </button>
                     </div>