fix: 动态分类子类别筛选修复

- 移除showDynamicCategory中的dynamicSubcategoryFilter重置
- 改为在侧边栏点击时重置筛选值
- 点击子类别按钮时保持筛选值不被重置
- 手机、电脑、汽车、摄像等动态分类现在可以正确筛选

templates/admin.html

@@ -534,11 +534,30 @@
                 container.innerHTML = '';
                 return;
             }
+            
+            // 获取当前筛选值 - 根据容器ID判断
+            let currentFilter = '';
+            if (containerId === 'model-subcategory-filters') currentFilter = modelSubcategoryFilter;
+            else if (containerId === 'gpu-subcategory-filters') currentFilter = gpuSubcategoryFilter;
+            else if (containerId === 'cpu-subcategory-filters') currentFilter = cpuSubcategoryFilter;
+            else if (containerId === 'dynamic-subcategory-filters') currentFilter = dynamicSubcategoryFilter;
+            
+            // 渲染子类别按钮
             container.innerHTML = cat.subcategories.map(sub => `
-                <button onclick="${filterFunction}('${sub.id}')" class="px-3 py-1 rounded text-sm bg-white border text-gray-600 hover:bg-gray-100">
-                    <i class="${sub.icon} mr-1"></i>${sub.name}
+                <button onclick="${filterFunction}('${sub.id}')" class="px-3 py-1 rounded text-sm ${currentFilter === sub.id ? 'bg-indigo-600 text-white' : 'bg-white border text-gray-600 hover:bg-gray-100'}">
+                    <i class="${sub.icon || 'ri-folder-line'} mr-1"></i>${sub.name}
                 </button>
             `).join('');
+            
+            // 更新"全部"按钮的样式 - 它是容器前面的那个按钮
+            const allBtn = container.previousElementSibling;
+            if (allBtn && allBtn.tagName === 'BUTTON') {
+                if (currentFilter === '') {
+                    allBtn.className = 'px-3 py-1 rounded text-sm bg-indigo-600 text-white';
+                } else {
+                    allBtn.className = 'px-3 py-1 rounded text-sm bg-white border text-gray-600 hover:bg-gray-100';
+                }
+            }
         }
 
         const colorMap = {
@@ -647,7 +666,7 @@
                 } else {
                     // 动态分类
                     html += `
-                        <a href="#cat-${cat.id}" onclick="showDynamicCategory('${cat.id}')" class="sidebar-link flex items-center gap-2 px-3 py-2 rounded-lg text-gray-300" data-section="cat-${cat.id}">
+                        <a href="#cat-${cat.id}" onclick="dynamicSubcategoryFilter='';showDynamicCategory('${cat.id}')" class="sidebar-link flex items-center gap-2 px-3 py-2 rounded-lg text-gray-300" data-section="cat-${cat.id}">
                             <i class="${cat.icon}"></i>
                             <span>${cat.name}管理</span>
                         </a>
@@ -669,7 +688,8 @@
         // 显示动态分类数据
         async function showDynamicCategory(categoryId) {
             dynamicCategoryId = categoryId;
-            dynamicSubcategoryFilter = '';
+            // 不要每次都重置筛选值，除非是新切换的分类
+            // dynamicSubcategoryFilter = '';  // 移除这行
             const cat = categories.find(c => c.id === categoryId);
             const fields = cat ? (cat.fields || []) : [];
             const fixedFields = ['id', 'created_at', 'updated_at', 'visible', 'raw_text', 'category_id', 'subcategory_id', 'is_pinned', 'images'];