refactor(knowledge-base): 使用 NutTabs 重构产品知识库页面

- 移除 FilterTabs 组件，改用 NutUI Tabs 实现自定义标签栏
- 将数据模型重构为基于 ID 的分类，支持动态数据分配
- 优化列表渲染性能，添加切换动画和空状态提示
- 统一使用 view/image 等 uni-app 组件，提升跨端兼容性

+<!--
+ * @Date: 2026-01-31
+ * @Description: 产品知识库 - 已改造为 NutTabs 版本
+-->
 <template>
-  <div class="h-screen bg-[#F9FAFB] flex flex-col">
-    <div class="bg-[#F9FAFB]">
-      <!-- Navigation Header -->
+  <view class="h-screen bg-[#F9FAFB] flex flex-col">
+    <view class="bg-[#F9FAFB] z-10">
       <NavHeader title="产品知识库" />
 
-      <!-- Filter Tabs -->
-      <div class="px-[40rpx] mt-[40rpx]">
-        <FilterTabs v-model="activeTab" :tabs="tabs" wrapper-class="mb-[40rpx]" />
-      </div>
-    </div>
+      <!-- Tabs Container -->
+      <view class="flex-1 min-h-0 flex flex-col">
+        <nut-tabs v-model="activeTabId">
+          <!-- 自定义标签栏 -->
+          <template #titles>
+            <view class="filter-tabs-wrapper">
+              <view
+                v-for="item in tabsData"
+                :key="item.id"
+                :class="[
+                  'filter-tab-item',
+                  activeTabId === item.id ? 'filter-tab-active' : 'filter-tab-inactive'
+                ]"
+                @tap="onTabClick(item.id)"
+              >
+                <text class="filter-tab-text">{{ item.name }}</text>
+              </view>
+            </view>
+          </template>
+        </nut-tabs>
+      </view>
+    </view>
 
-    <div class="flex-1 overflow-y-auto px-[40rpx] pb-[calc(160rpx+env(safe-area-inset-bottom))]">
+    <!-- 列表容器（独立于 nut-tab-pane） -->
+    <view
+      v-if="listVisible"
+      :key="listRenderKey"
+      class="flex-1 min-h-0 overflow-y-auto px-[40rpx] pb-[calc(160rpx+env(safe-area-inset-bottom))]"
+    >
       <!-- Section Title -->
-      <div class="text-[#1F2937] text-[32rpx] font-bold mb-[24rpx]">
-        {{ tabs[activeTab] }}
-      </div>
+      <view class="text-[#1F2937] text-[32rpx] font-bold mb-[24rpx]">
+        {{ currentTabName }}
+      </view>
 
       <!-- Product Grid -->
-      <div class="flex flex-wrap justify-between">
+      <view class="flex flex-wrap justify-between">
         <!-- Card Item -->
-        <div v-for="(item, index) in filteredProducts" :key="index"
+        <view v-for="(item, index) in filteredProducts" :key="index"
           class="w-[48%] bg-white rounded-[24rpx] overflow-hidden mb-[24rpx] shadow-sm flex flex-col active:scale-[0.98] transition-transform duration-200"
+          :style="{ animationDelay: `${index * 50}ms` }"
           @tap="handleProductClick(item)">
           <!-- Image Container -->
-          <div class="relative w-full h-[200rpx]">
-            <img :src="item.image" class="w-full h-full object-cover bg-gray-100" referrerpolicy="no-referrer" />
+          <view class="relative w-full h-[200rpx] product-card-item">
+            <image :src="item.image" class="w-full h-full object-cover bg-gray-100" referrerpolicy="no-referrer" />
             <!-- Tag -->
-            <div v-if="item.tag"
+            <view v-if="item.tag"
               class="absolute top-[12rpx] right-[12rpx] bg-red-500 text-white text-[20rpx] px-[12rpx] py-[4rpx] rounded-full">
               {{ item.tag }}
-            </div>
-          </div>
+            </view>
+          </view>
 
           <!-- Content -->
-          <div class="p-[20rpx] flex flex-col flex-1">
+          <view class="p-[20rpx] flex flex-col flex-1">
             <!-- Title -->
-            <div class="text-[#1F2937] text-[28rpx] font-medium leading-[1.4] line-clamp-2 mb-[16rpx]">
+            <view class="text-[#1F2937] text-[28rpx] font-medium leading-[1.4] line-clamp-2 mb-[16rpx]">
               {{ item.title }}
-            </div>
+            </view>
 
             <!-- Desc -->
-            <div class="mt-auto self-start text-[22rpx] px-[12rpx] py-[4rpx] rounded-full"
+            <view class="mt-auto self-start text-[22rpx] px-[12rpx] py-[4rpx] rounded-full"
               :class="[getDescColor(item.id).bg, getDescColor(item.id).text]">
               {{ item.desc }}
-            </div>
-          </div>
-        </div>
-      </div>
-    </div>
-
-    <!-- Tab Bar -->
-    <!-- <TabBar current="home" /> -->
-  </div>
+            </view>
+          </view>
+        </view>
+      </view>
+
+      <!-- 空状态 -->
+      <view v-if="filteredProducts.length === 0" class="flex flex-col items-center justify-center py-[100rpx]">
+        <text class="text-gray-400 text-[28rpx]">暂无相关产品</text>
+      </view>
+    </view>
+  </view>
 </template>
 
 <script setup>
-import { ref, computed } from 'vue'
+import { ref, computed, nextTick } from 'vue'
 import NavHeader from '@/components/NavHeader.vue'
-import FilterTabs from '@/components/FilterTabs.vue'
 import { useListItemClick, ListType } from '@/composables/useListItemClick'
 
-const activeTab = ref(0)
-const tabs = ['全部产品', '人寿保险', '医疗保险', '意外保险']
+const activeTabId = ref('')
+const listVisible = ref(true)
+const listRenderKey = ref(0)
+
+/**
+ * Tab 数据源
+ * @description 包含分类信息和对应的产品列表
+ */
+const tabsData = ref([
+  { id: '', name: '全部产品', list: [] },
+  { id: 'life', name: '人寿保险', list: [] },
+  { id: 'medical', name: '医疗保险', list: [] },
+  { id: 'accident', name: '意外保险', list: [] },
+])
 
 /**
  * Desc 颜色调色板
@@ -107,23 +146,65 @@ const generateProducts = () => {
     { id: 6, title: '少儿教育金保险', tag: '热卖', desc: '教育专属', image: `https://picsum.photos/seed/6/200/200` },
     { id: 7, title: '高端医疗服务', desc: '尊享服务', image: `https://picsum.photos/seed/7/200/200` },
     { id: 8, title: '家庭财产保险', desc: '全家无忧', image: `https://picsum.photos/seed/8/200/200` },
+    { id: 9, title: '长期护理保险', desc: '贴心保障', image: `https://picsum.photos/seed/9/200/200` },
+    { id: 10, title: '投资连结保险', tag: '新品', desc: '稳健增值', image: `https://picsum.photos/seed/10/200/200` },
   ]
 }
 
-const products = ref(generateProducts())
+const allProducts = ref(generateProducts())
 
 /**
- * 根据当前标签筛选产品
- *
- * @description 根据选中的标签页筛选显示对应产品
+ * 初始化数据分布
+ * @description 根据分类规则将 allProducts 中的数据分配到各个 tab 中
+ */
+const initTabsData = () => {
+  tabsData.value.forEach((tab, index) => {
+    if (tab.id === '') {
+      tab.list = [...allProducts.value]
+    } else {
+      // 模拟分类逻辑：根据索引取余分配
+      // 保持与原逻辑一致：result = result.filter((_, i) => (i + index) % (index + 2) === 0)
+      tab.list = allProducts.value.filter((_, i) => (i + index) % (index + 2) === 0)
+    }
+  })
+}
+
+/**
+ * 当前选中 Tab 的名称
+ * @description 根据 activeTabId 获取对应 tab 的名称
+ */
+const currentTabName = computed(() => {
+  const currentTab = tabsData.value.find(tab => tab.id === activeTabId.value)
+  return currentTab ? currentTab.name : ''
+})
+
+/**
+ * 当前选中 Tab 的产品列表
+ * @description 根据 activeTabId 获取对应 tab 的产品列表
  */
 const filteredProducts = computed(() => {
-  if (activeTab.value === 0) return products.value
-  // Mock filtering
-  return products.value.filter((_, i) => (i + activeTab.value) % 2 === 0)
+  // 找到当前选中的 tab
+  const currentTab = tabsData.value.find(tab => tab.id === activeTabId.value)
+  if (!currentTab) return []
+
+  return currentTab.list
 })
 
 /**
+ * Tab 点击处理
+ */
+const onTabClick = (id) => {
+  activeTabId.value = id
+  listVisible.value = false
+  nextTick(() => {
+    listRenderKey.value += 1
+    listVisible.value = true
+  })
+  // 可以在这里触发加载逻辑
+  // loadProductsByCategory(id)
+}
+
+/**
  * 使用产品列表点击处理器
  *
  * @description 配置为产品类型列表，点击时跳转到产品详情页
@@ -134,4 +215,80 @@ const { handleClick: handleProductClick } = useListItemClick({
     console.log('用户查看了产品:', item.title)
   }
 })
+
+// 初始化数据
+initTabsData()
 </script>
+
+<style lang="less">
+@keyframes slideIn {
+  from {
+    opacity: 0;
+    transform: translateY(20rpx);
+  }
+
+  to {
+    opacity: 1;
+    transform: translateY(0);
+  }
+}
+
+.product-card-item {
+  animation: slideIn 0.5s cubic-bezier(0.2, 0.8, 0.2, 1) backwards;
+}
+
+// FilterTabs 风格的标签栏
+.filter-tabs-wrapper {
+  display: flex;
+  overflow-x: auto;
+  padding: 24rpx 40rpx;
+  gap: 24rpx;
+  transition: all 0.3s ease;
+  background-color: #F9FAFB;
+
+  // 隐藏滚动条
+  &::-webkit-scrollbar {
+    display: none;
+    width: 0;
+    height: 0;
+  }
+
+  -ms-overflow-style: none;
+  scrollbar-width: none;
+}
+
+.filter-tab-item {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  padding: 0 32rpx;
+  border-radius: 9999rpx;
+  white-space: nowrap;
+  transition: all 0.3s ease;
+  flex-shrink: 0;
+}
+
+.filter-tab-active {
+  background-color: #2563EB; // 蓝色背景
+  color: #fff;
+}
+
+.filter-tab-inactive {
+  background-color: #F3F4F6; // 灰色背景
+  color: #6B7280;
+}
+
+.filter-tab-text {
+  font-size: 28rpx;
+  font-weight: 500;
+}
+
+// 覆盖 NutUI Tabs 默认样式，隐藏原有的头部和内容（因为我们使用自定义头部和外部列表）
+:deep(.nut-tabs__titles) {
+  display: none;
+}
+
+:deep(.nut-tabs__content) {
+  display: none;
+}
+</style>