fix: 优化素材绑定页面UI布局和代码格式

- 清理多余的空行，优化代码格式
- 调整模特选择下拉框位置，移到批量操作区域
- 改善筛选区域的布局结构
- 保持UI组件的逻辑分组和视觉一致性

apps/desktop/src/pages/MaterialModelBinding.tsx

@@ -172,7 +172,7 @@ export const MaterialModelBinding: React.FC = () => {
   // 过滤素材
   const filteredMaterials = materials.filter(material => {
     const matchesSearch = material.name.toLowerCase().includes(searchQuery.toLowerCase());
-    
+
     switch (filterType) {
       case 'bound':
         return matchesSearch && material.model_id;
@@ -233,7 +233,7 @@ export const MaterialModelBinding: React.FC = () => {
                 <h1 className="text-xl font-semibold text-gray-900">素材-模特绑定管理</h1>
               </div>
             </div>
-            
+
             <div className="flex items-center space-x-3">
               <button
                 onClick={() => setShowStats(!showStats)}
@@ -261,7 +261,7 @@ export const MaterialModelBinding: React.FC = () => {
                   </div>
                 </div>
               </div>
-              
+
               <div className="bg-green-50 rounded-lg p-4">
                 <div className="flex items-center">
                   <Link className="w-8 h-8 text-green-600" />
@@ -271,7 +271,7 @@ export const MaterialModelBinding: React.FC = () => {
                   </div>
                 </div>
               </div>
-              
+
               <div className="bg-yellow-50 rounded-lg p-4">
                 <div className="flex items-center">
                   <Unlink className="w-8 h-8 text-yellow-600" />
@@ -281,7 +281,7 @@ export const MaterialModelBinding: React.FC = () => {
                   </div>
                 </div>
               </div>
-              
+
               <div className="bg-purple-50 rounded-lg p-4">
                 <div className="flex items-center">
                   <BarChart3 className="w-8 h-8 text-purple-600" />
@@ -313,7 +313,7 @@ export const MaterialModelBinding: React.FC = () => {
                   className="w-full pl-10 pr-4 py-2 border border-gray-300 rounded-md focus:outline-none focus:ring-2 focus:ring-blue-500 focus:border-transparent"
                 />
               </div>
-              
+
               <div className="flex gap-2 items-center">
                 <Filter className="w-4 h-4 text-gray-500" />
                 <CustomSelect
@@ -328,18 +328,17 @@ export const MaterialModelBinding: React.FC = () => {
                   options={getFilterOptions()}
                   className="min-w-[120px]"
                 />
+                <CustomSelect
+                  value={selectedModel}
+                  onChange={setSelectedModel}
+                  options={getModelOptions()}
+                  className="min-w-[150px]"
+                />
               </div>
             </div>
 
             {/* 批量操作 */}
             <div className="flex gap-2 items-center">
-              <CustomSelect
-                value={selectedModel}
-                onChange={setSelectedModel}
-                options={getModelOptions()}
-                className="min-w-[150px]"
-              />
-              
               {selectedMaterials.length > 0 && (
                 <>
                   <button
@@ -350,7 +349,7 @@ export const MaterialModelBinding: React.FC = () => {
                     <Link className="w-4 h-4" />
                     <span>批量绑定 ({selectedMaterials.length})</span>
                   </button>
-                  
+
                   <button
                     onClick={handleBatchUnbind}
                     className="px-3 py-2 text-sm font-medium text-red-700 bg-red-50 border border-red-200 rounded-md hover:bg-red-100 transition-colors flex items-center space-x-1"