feat: 互动记录/数据看板自动刷新 + 日志时间格式修复

1. Interactions.vue: 每30秒自动刷新互动记录列表
2. Dashboard.vue: 每30秒自动刷新数据看板
3. Logs.vue: 时间格式修复（T→空格，去掉时区标识）
4. logs.py: created_at 改用 strftime 输出 +08:00 格式（而非 isoformat 的 +00:00）

页面保持浏览时自动获取最新数据，离开页面时自动清除定时器

backend/app/api/endpoints/logs.py

@@ -37,7 +37,7 @@ async def get_login_logs(
     items = [{
         "id": l.id, "user_id": l.user_id, "user_account": l.user_account,
         "action": l.action, "session_id": l.session_id,
-        "error_msg": l.error_msg, "created_at": l.created_at.isoformat()
+        "error_msg": l.error_msg, "created_at": l.created_at.strftime("%Y-%m-%dT%H:%M:%S+08:00") if l.created_at else None
     } for l in logs]
     return ApiResponse(data={"total": total, "page": page, "page_size": page_size, "items": items})
 

frontend/src/views/Dashboard.vue

@@ -216,10 +216,13 @@ onMounted(async () => {
   await loadMonthlyTrend()
   window.addEventListener('resize', handleResize)
   window.addEventListener('page-refresh', loadDashboard)
+  // 每30秒自动刷新数据看板
+  _dashTimer = setInterval(loadDashboard, 30000)
 })
 onUnmounted(() => {
   window.removeEventListener('resize', handleResize)
   window.removeEventListener('page-refresh', loadDashboard)
+  if (_dashTimer) clearInterval(_dashTimer)
   dailyChartInst?.dispose()
   monthlyChartInst?.dispose()
 })

frontend/src/views/Interactions.vue

@@ -194,12 +194,19 @@ async function handleExport() {
   const a = document.createElement('a'); a.href = url; a.download = 'interactions.xlsx'; a.click()
 }
 
+let _autoRefreshTimer = null
+
 onMounted(async () => {
   await loadArticleDomain()  // 先等域名加载完
   load()
   window.addEventListener('page-refresh', load)
+  // 每30秒自动刷新互动记录
+  _autoRefreshTimer = setInterval(load, 30000)
+})
+onUnmounted(() => {
+  window.removeEventListener('page-refresh', load)
+  if (_autoRefreshTimer) clearInterval(_autoRefreshTimer)
 })
-onUnmounted(() => window.removeEventListener('page-refresh', load))
 </script>
 <style scoped>
 .filter-bar { display: flex; gap: 10px; margin-bottom: 12px; flex-wrap: wrap; }

frontend/src/views/Logs.vue

@@ -31,7 +31,7 @@
           </el-table-column>
           <el-table-column label="时间" width="160">
             <template #default="{ row }">
-              <span style="font-size:12px;color:var(--color-text-muted)">{{ row.created_at?.slice(0,16) }}</span>
+              <span style="font-size:12px;color:var(--color-text-muted)">{{ row.created_at ? row.created_at.replace('T',' ').replace('+08:00','').replace('+00:00','').slice(0,16) : '--' }}</span>
             </template>
           </el-table-column>
         </el-table>