feat: 在AI推荐面板中显示推荐生成时间

frontend/src/components/Dashboard-AI.vue

@@ -1,7 +1,10 @@
 <template>
   <div class="dashboard-ai-container">
     <div class="dashboard-header">
-      <h2 class="dashboard-title">Dashboard AI</h2>
+      <div class="dashboard-title-wrapper">
+        <h2 class="dashboard-title">Dashboard AI</h2>
+       
+      </div>
       <el-button type="primary" :loading="loading" @click="fetchAIRecommendations">
         <el-icon style="margin-right: 5px"><MagicStick /></el-icon>
         获取 AI 推荐
@@ -13,6 +16,12 @@
         <el-card class="box-card" shadow="hover">
           <div class="card-header">
             <span>AI 推荐项目</span>
+             <span v-if="lastRecommendationTime" class="last-recommendation-time">
+          生成时间: {{ lastRecommendationTime }}
+        </span>
+        <span v-else class="last-recommendation-time text-muted">
+          暂无推荐时间
+        </span>
             <el-tag type="success">{{ aiRecommendations.length }} 个推荐</el-tag>
           </div>
           <div v-if="loading" style="text-align: center; padding: 40px;">
@@ -129,7 +138,7 @@
                   <span v-else>{{ scope.row.title }}</span>
                 </template>
               </el-table-column>
-              <el-table-column prop="source" label="来源" width="80" />
+              <el-table-column prop="source" label="来源" width="220" />
               <el-table-column prop="publishDate" label="发布日期" width="95">
                 <template #default="scope">
                   {{ formatDate(scope.row.publishDate) }}
@@ -172,6 +181,7 @@ const dateRange = ref<[string, string] | null>(null)
 const showAllBids = ref(false)
 const bidsLoading = ref(false)
 const bidsByDateRange = ref<any[]>([])
+const lastRecommendationTime = ref<string | null>(null)
 
 // 从 localStorage 加载保存的日期范围
 const loadSavedDateRange = () => {
@@ -194,12 +204,15 @@ watch(dateRange, (newDateRange) => {
 const loadLatestRecommendations = async () => {
   try {
     const response = await api.get('/api/ai/latest-recommendations')
-    const recommendations = response.data
-    
+    const { recommendations, generatedAt } = response.data
+
+    // 更新生成时间
+    lastRecommendationTime.value = generatedAt
+
     // 获取所有置顶的项目
     const pinnedResponse = await api.get('/api/bids/pinned')
     const pinnedTitles = new Set(pinnedResponse.data.map((b: any) => b.title))
-    
+
     // 更新每个推荐项目的 pin 状态
     aiRecommendations.value = recommendations.map((rec: any) => ({
       ...rec,
@@ -289,6 +302,9 @@ const fetchAIRecommendations = async () => {
       recommendations
     })
 
+    // 更新时间戳
+    lastRecommendationTime.value = new Date().toLocaleString('zh-CN', { hour12: false })
+
     ElMessage.success('AI 推荐获取成功')
   } catch (error: any) {
     ElMessage.error('获取 AI 推荐失败')
@@ -389,11 +405,26 @@ const togglePin = async (item: AIRecommendation) => {
   gap: 10px;
 }
 
+.dashboard-title-wrapper {
+  display: flex;
+  flex-direction: column;
+  gap: 4px;
+}
+
 .dashboard-title {
   margin: 0;
   font-size: 1.25rem;
 }
 
+.last-recommendation-time {
+  font-size: 0.75rem;
+  color: var(--el-text-color-secondary);
+}
+
+.last-recommendation-time.text-muted {
+  color: var(--el-text-color-placeholder);
+}
+
 .ai-section {
   margin-top: 16px;
 }
@@ -469,6 +500,11 @@ a:hover {
     align-items: flex-start;
   }
 
+  .dashboard-title-wrapper {
+    flex-direction: column;
+    gap: 4px;
+  }
+
   .dashboard-title {
     font-size: 1.1rem;
   }

src/ai/ai.service.ts

@@ -17,6 +17,7 @@ export interface AIRecommendation {
   source: string;
   confidence: number;
   publishDate?: Date;
+  generatedAt?: string;
 }
 
 @Injectable()
@@ -127,10 +128,22 @@ ${JSON.stringify(
     }
   }
 
-  async getLatestRecommendations(): Promise<AIRecommendation[]> {
+  async getLatestRecommendations(): Promise<{ recommendations: AIRecommendation[]; generatedAt: string | null }> {
     this.logger.log('获取最新的 AI 推荐结果');
 
     try {
+      // 查询最大的 createdAt 作为生成时间
+      const maxCreatedAtResult = await this.aiRecommendationRepository
+        .createQueryBuilder('rec')
+        .select('MAX(rec.createdAt)', 'maxCreatedAt')
+        .getRawOne();
+
+      const generatedAt = maxCreatedAtResult?.maxCreatedAt
+        ? new Date(maxCreatedAtResult.maxCreatedAt).toLocaleString('zh-CN', { hour12: false })
+        : null;
+
+      this.logger.log(`AI 推荐生成时间: ${generatedAt}`);
+
       const entities = await this.aiRecommendationRepository.find({
         order: { confidence: 'DESC' },
       });
@@ -160,7 +173,7 @@ ${JSON.stringify(
         );
       });
 
-      return result;
+      return { recommendations: result, generatedAt };
     } catch (error) {
       this.logger.error('获取最新 AI 推荐失败:', error);
       throw error;