feat(agent): 优化聊天历史组件样式和图片展示，调整卡片布局和图片处理

src/views/agent/index/index.vue

@@ -18,7 +18,11 @@
         <a-col :span="3" v-for="(product, k) in item.agent_products">
           <div class="card-container" @click="goDetail(product?.type, product?.id)">
             <div class="card-image-container">
-              <img class="card-image" :src="product?.icon_url" />
+              <img
+                class="card-image"
+                :src="product?.icon_url"
+                style="width: 100%; height: 100%; object-fit: cover;"
+              />
             </div>
             <div class="card-content">
               <div class="card-title">{{ product?.name }}</div>