feat: 为搜索页栏目添加图片缩略图功能

- 图片预览：产品与解决方案栏目添加缩略图功能
- 组件提取：在搜索结果页，将单个搜索结果单独提取为组件SearchResultCard

app/components/pages/search/SearchResultCard.vue

@@ -0,0 +1,72 @@
+<template>
+  <el-card class="result-card">
+    <el-row>
+      <el-col :span="12">
+        <h3 class="result-title">{{ item.title }}</h3>
+        <p v-if="item.summary" class="result-summary">
+          {{ item.summary }}
+        </p>
+        <p v-if="item.type" class="result-type">
+          <span>{{ $t('search.section') }}: </span>
+          <span class="result-type-name">{{ typeLabel }}</span>
+        </p>
+      </el-col>
+      <el-col :span="12" class="image-col">
+        <el-image
+          v-if="item.thumbnail"
+          :src="item.thumbnail"
+          :alt="item.title"
+          style="width: 150px"
+        />
+      </el-col>
+    </el-row>
+  </el-card>
+</template>
+
+<script setup lang="ts">
+  defineProps<{
+    item: SearchItemView;
+    typeLabel: string;
+  }>();
+</script>
+
+<style scoped>
+  .result-card {
+    border-radius: 12px;
+    transition: box-shadow 0.2s ease;
+  }
+
+  .result-card:hover {
+    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.06);
+  }
+
+  .result-title {
+    font-size: 1.2rem;
+    font-weight: 600;
+    color: var(--el-color-primary);
+    display: inline-block;
+  }
+
+  .result-summary {
+    font-size: 0.95rem;
+    color: var(--el-text-color-regular);
+    margin-bottom: 0.5rem;
+    line-height: 1.6;
+  }
+
+  .result-type {
+    font-size: 0.8rem;
+    color: var(--el-text-color-secondary);
+  }
+
+  .result-type-name {
+    margin-left: 4px;
+    color: var(--el-color-primary);
+  }
+
+  .image-col {
+    display: flex;
+    justify-content: end;
+    align-items: center;
+  }
+</style>