refactor(frontend): 优化共享视图页面

- 改进 Dashboard 和 Usage 页面

frontend/src/views/shared/Dashboard.vue

@@ -1101,7 +1101,7 @@ async function viewAnnouncementDetail(announcement: Announcement) {
     try {
       await announcementApi.markAsRead(announcement.id)
       announcement.is_read = true
-    } catch {}
+    } catch { /* 静默忽略标记已读错误 */ }
   }
   selectedAnnouncement.value = announcement
   detailDialogOpen.value = true

frontend/src/views/shared/Usage.vue

@@ -109,6 +109,7 @@ import {
 } from '@/features/usage/composables'
 import type { PeriodValue, FilterStatusValue } from '@/features/usage/types'
 import type { UserOption } from '@/features/usage/components/UsageRecordsTable.vue'
+import { log } from '@/utils/logger'
 
 const route = useRoute()
 const authStore = useAuthStore()
@@ -250,7 +251,7 @@ async function pollActiveRequests() {
       await refreshData()
     }
   } catch (error) {
-    console.error('轮询活跃请求状态失败:', error)
+    log.error('轮询活跃请求状态失败:', error)
   }
 }
 
@@ -423,7 +424,7 @@ async function exportData(format: 'csv' | 'json') {
     a.click()
     window.URL.revokeObjectURL(url)
   } catch (error) {
-    console.error('导出失败:', error)
+    log.error('导出失败:', error)
   }
 }
 </script>