refactor(reporting-service): 移除仪表板最近活动的模拟数据

无真实数据时返回空数组，不再生成假数据

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

backend/services/reporting-service/src/application/services/dashboard-application.service.ts

@@ -202,7 +202,7 @@ export class DashboardApplicationService {
 
   /**
    * 获取最近活动数据
-   * 优先从数据库获取，若无则返回模拟数据
+   * 从数据库获取真实数据，无数据时返回空数组
    */
   async getActivities(limit: number): Promise<DashboardActivitiesResponseDto> {
     this.logger.debug(`Fetching dashboard activities, limit: ${limit}`);
@@ -210,26 +210,17 @@ export class DashboardApplicationService {
     // 从数据库获取活动记录
     const dbActivities = await this.activityRepo.findRecent(limit);
 
-    let activities: DashboardActivityItemDto[];
-
-    if (dbActivities.length > 0) {
-      // 使用真实数据
-      activities = dbActivities.map((activity) => ({
-        id: String(activity.id),
-        type: activity.activityType as ActivityType,
-        icon: activity.icon || '📌',
-        title: activity.title,
-        description: activity.description,
-        timestamp: this.formatRelativeTime(
-          Math.floor((Date.now() - (activity.createdAt?.getTime() || Date.now())) / 60000),
-        ),
-        createdAt: activity.createdAt?.toISOString() || new Date().toISOString(),
-      }));
-    } else {
-      // 如果没有数据，返回模拟数据
-      this.logger.debug('No activities found, generating mock data');
-      activities = this.generateMockActivities(limit);
-    }
+    const activities: DashboardActivityItemDto[] = dbActivities.map((activity) => ({
+      id: String(activity.id),
+      type: activity.activityType as ActivityType,
+      icon: activity.icon || '📌',
+      title: activity.title,
+      description: activity.description,
+      timestamp: this.formatRelativeTime(
+        Math.floor((Date.now() - (activity.createdAt?.getTime() || Date.now())) / 60000),
+      ),
+      createdAt: activity.createdAt?.toISOString() || new Date().toISOString(),
+    }));
 
     return { activities };
   }
@@ -300,82 +291,6 @@ export class DashboardApplicationService {
     return data;
   }
 
-  /**
-   * 生成模拟活动数据
-   */
-  private generateMockActivities(limit: number): DashboardActivityItemDto[] {
-    const activityTemplates: Array<{
-      type: ActivityType;
-      icon: string;
-      title: string;
-      descriptionTemplate: string;
-    }> = [
-      {
-        type: 'user_register',
-        icon: '👤',
-        title: '新用户注册',
-        descriptionTemplate: '用户 {name} 完成注册',
-      },
-      {
-        type: 'company_authorization',
-        icon: '🏢',
-        title: '公司授权',
-        descriptionTemplate: '{province}省公司完成授权',
-      },
-      {
-        type: 'planting_order',
-        icon: '🌳',
-        title: '认种订单',
-        descriptionTemplate: '用户 {name} 认种了 {count} 棵榴莲树',
-      },
-      {
-        type: 'system_update',
-        icon: '⚙️',
-        title: '系统更新',
-        descriptionTemplate: '{feature} 已更新',
-      },
-      {
-        type: 'report_generated',
-        icon: '📊',
-        title: '报表生成',
-        descriptionTemplate: '{month}月份运营报表已生成',
-      },
-    ];
-
-    const names = ['张三', '李四', '王五', '赵六', '钱七'];
-    const provinces = ['广东', '浙江', '江苏', '山东', '四川'];
-    const features = ['龙虎榜规则', '结算规则', '授权流程'];
-    const months = ['1', '2', '3', '11', '12'];
-
-    const activities: DashboardActivityItemDto[] = [];
-    const now = new Date();
-
-    for (let i = 0; i < limit; i++) {
-      const template = activityTemplates[i % activityTemplates.length];
-      const minutesAgo = (i + 1) * 15 + Math.floor(Math.random() * 30);
-      const createdAt = new Date(now.getTime() - minutesAgo * 60 * 1000);
-
-      let description = template.descriptionTemplate;
-      description = description.replace('{name}', names[Math.floor(Math.random() * names.length)]);
-      description = description.replace('{province}', provinces[Math.floor(Math.random() * provinces.length)]);
-      description = description.replace('{count}', String(Math.floor(Math.random() * 10) + 1));
-      description = description.replace('{feature}', features[Math.floor(Math.random() * features.length)]);
-      description = description.replace('{month}', months[Math.floor(Math.random() * months.length)]);
-
-      activities.push({
-        id: String(i + 1),
-        type: template.type,
-        icon: template.icon,
-        title: template.title,
-        description,
-        timestamp: this.formatRelativeTime(minutesAgo),
-        createdAt: createdAt.toISOString(),
-      });
-    }
-
-    return activities;
-  }
-
   /**
    * 格式化日期为 MM-DD 格式
    */