fix(dashboard): 修复仪表板统计数据计算逻辑及样式优化

- 修改用户统计逻辑，确保正确计算活跃用户数量
- 更新时间序列统计的起始时间计算，包含当前时间段
- 优化仪表板样式，调整统计卡片间距和响应式布局
- 增强调用统计组件的显示效果，避免横向滚动条

server/routers/dashboard_router.py

@@ -605,7 +605,7 @@ async def get_dashboard_stats(
             db.query(func.count(Conversation.id)).filter(Conversation.status == "active").scalar() or 0
         )
         total_messages = db.query(func.count(Message.id)).scalar() or 0
-        total_users = db.query(func.count(distinct(Conversation.user_id))).scalar() or 0
+        total_users = db.query(func.count(User.id)).scalar() or 0
 
         # Feedback statistics
         total_feedbacks = db.query(func.count(MessageFeedback.id)).scalar() or 0
@@ -729,19 +729,22 @@ async def get_call_timeseries_stats(
 
         if time_range == "7hours":
             intervals = 7
-            start_time = now - timedelta(hours=intervals)
+            # 包含当前小时：从6小时前开始
+            start_time = now - timedelta(hours=intervals-1)
             time_format = "%Y-%m-%d %H:00"
             # SQLite compatible approach: 使用datetime函数转换UTC时间为北京时间
             group_format = func.strftime("%Y-%m-%d %H:00", func.datetime(Message.created_at, '+8 hours'))
         elif time_range == "7weeks":
             intervals = 7
-            start_time = now - timedelta(weeks=intervals)
+            # 包含当前周：从6周前开始
+            start_time = now - timedelta(weeks=intervals-1)
             time_format = "%Y-W%U"
             # SQLite compatible approach: 使用datetime函数转换UTC时间为北京时间
             group_format = func.strftime("%Y-%W", func.datetime(Message.created_at, '+8 hours'))
         else:  # 7days (default)
             intervals = 7
-            start_time = now - timedelta(days=intervals)
+            # 包含当前天：从6天前开始
+            start_time = now - timedelta(days=intervals-1)
             time_format = "%Y-%m-%d"
             # SQLite compatible approach: 使用datetime函数转换UTC时间为北京时间
             group_format = func.strftime("%Y-%m-%d", func.datetime(Message.created_at, '+8 hours'))
@@ -889,7 +892,8 @@ async def get_call_timeseries_stats(
 
         # 填充缺失的时间点（使用北京时间）
         data = []
-        current_time = start_time + timedelta(hours=8)  # 转换为北京时间
+        # 从start_time开始，转换为北京时间
+        current_time = start_time + timedelta(hours=8)
 
         if time_range == "7hours":
             delta = timedelta(hours=1)

web/src/assets/css/dashboard.css

@@ -493,8 +493,8 @@
 .compact-stats-grid {
   display: grid;
   grid-template-columns: repeat(3, 1fr);
-  gap: 16px;
-  margin-bottom: 24px;
+  gap: 8px;
+  margin-bottom: 16px;
 
   .mini-stat-card {
     background-color: var(--gray-0);
@@ -629,7 +629,7 @@
 @media (max-width: 768px) {
   .compact-stats-grid {
     grid-template-columns: repeat(2, 1fr);
-    gap: 8px;
+    gap: 6px;
 
     .mini-stat-card {
       padding: 8px;

web/src/components/dashboard/CallStatsComponent.vue

@@ -185,8 +185,9 @@ const renderCallStatsChart = () => {
         let result = `${params[0].name}<br/>`
         params.forEach(param => {
           total += param.value
+          const truncatedName = truncateLegend(param.seriesName)
           result += `<span style=\"display:inline-block;margin-right:5px;border-radius:10px;width:10px;height:10px;background-color:${param.color}\"></span>`
-          result += `${param.seriesName}: ${param.value}<br/>`
+          result += `${truncatedName}: ${param.value}<br/>`
         })
         const labelMap = { models: '模型调用', agents: '智能体调用', tokens: 'Token消耗', tools: '工具调用' }
         return `<div style=\"font-weight:bold;margin-bottom:5px\">${labelMap[callDataType.value]}</div>${result}<strong>总计: ${total}</strong>`
@@ -269,6 +270,7 @@ onUnmounted(() => {
   flex: 1;
   display: flex;
   padding: 16px; /* 减少padding从20px到16px */
+  overflow-x: hidden; /* 防止横向滚动条 */
 }
 
 .call-stats-container {