diff --git a/admin/src/views/tracker/visitor/components/EventTimeline.vue b/admin/src/views/tracker/visitor/components/EventTimeline.vue
new file mode 100644
index 0000000..ed5550e
--- /dev/null
+++ b/admin/src/views/tracker/visitor/components/EventTimeline.vue
@@ -0,0 +1,89 @@
+<!-- 访客统计 · 事件时间线（详情页轨迹 Tab 与会话抽屉共用） -->
+<!-- 事件行三分支：page_view（浏览+停留副行+title）/ page_stay 独立条目 / sdk_loaded 及自定义事件 -->
+<template>
+  <ElTimeline>
+    <ElTimelineItem
+      v-for="(e, i) in events"
+      :key="i"
+      :icon="eventMeta(e.event_name).icon"
+      :type="eventMeta(e.event_name).type"
+      :timestamp="formatTime(e.time)"
+    >
+      <!-- page_view：浏览 + 停留副行（active_ms>0 才显示）+ title 小字 -->
+      <template v-if="e.event_name === 'page_view'">
+        <div>
+          浏览
+          <span class="mono-path">{{ e.path || '—' }}</span>
+        </div>
+        <div v-if="(e.active_ms ?? 0) > 0" class="stay-line"
+          >停留 {{ formatStay(e.active_ms) }}</div
+        >
+        <div v-if="e.title" class="title-line">{{ e.title }}</div>
+      </template>
+      <!-- page_stay 独立条目（无匹配 page_view 时服务端保留原事件名） -->
+      <template v-else-if="e.event_name === 'page_stay'">
+        <div>
+          停留
+          <span class="mono-path">{{ e.path || '—' }}</span>
+          （{{ formatStay(e.active_ms ?? 0) }}）
+        </div>
+        <div v-if="e.title" class="title-line">{{ e.title }}</div>
+      </template>
+      <!-- sdk_loaded / 其他自定义事件 -->
+      <template v-else>
+        <div>
+          {{ eventMeta(e.event_name).label }}
+          <span v-if="e.path" class="mono-path">{{ e.path }}</span>
+        </div>
+      </template>
+    </ElTimelineItem>
+  </ElTimeline>
+</template>
+
+<script setup lang="ts">
+  import type { Component } from 'vue'
+  import { Cpu, InfoFilled, Timer, View } from '@element-plus/icons-vue'
+  import type { TimelineEvent } from '@/api/tracker/visitors'
+  import { formatStay } from '@/utils/tracker'
+
+  defineOptions({ name: 'EventTimeline' })
+
+  defineProps<{
+    /** 已按服务端合并规则处理过的序列（page_stay 已并入 page_view 的 active_ms） */
+    events: TimelineEvent[]
+  }>()
+
+  /** ISO（后端上海时间）→ HH:mm */
+  const formatTime = (iso?: string | null): string => (iso ? iso.slice(11, 16) : '—')
+
+  /** 事件行图标/节点色：page_view=浏览、page_stay=计时、sdk_loaded=加载、其余兜底 */
+  const EVENT_META: Record<
+    string,
+    { icon: Component; type: 'primary' | 'warning' | 'info'; label: string }
+  > = {
+    page_view: { icon: View, type: 'primary', label: '浏览' },
+    page_stay: { icon: Timer, type: 'warning', label: '停留' },
+    sdk_loaded: { icon: Cpu, type: 'info', label: 'SDK 加载' }
+  }
+  const eventMeta = (name: string) =>
+    EVENT_META[name] ?? { icon: InfoFilled, type: 'info', label: name }
+</script>
+
+<style lang="scss" scoped>
+  .mono-path {
+    font-family: var(--el-font-family-mono, monospace);
+    font-size: 12px;
+  }
+
+  .stay-line {
+    margin-top: 2px;
+    font-size: 12px;
+    color: var(--el-color-warning);
+  }
+
+  .title-line {
+    margin-top: 2px;
+    font-size: 12px;
+    color: var(--el-text-color-secondary);
+  }
+</style>
diff --git a/admin/src/views/tracker/visitor/detail.vue b/admin/src/views/tracker/visitor/detail.vue
index e7608bd..558baac 100644
--- a/admin/src/views/tracker/visitor/detail.vue
+++ b/admin/src/views/tracker/visitor/detail.vue
@@ -145,46 +145,17 @@
                         >· 停留 {{ formatStay(sessionStayMs(session)) }}</span
                       >
                     </div>
-                    <ElTimeline class="session-timeline">
-                      <ElTimelineItem
-                        v-for="(e, i) in session.events"
-                        :key="i"
-                        :icon="eventMeta(e.event_name).icon"
-                        :type="eventMeta(e.event_name).type"
-                        :timestamp="formatTime(e.time)"
-                      >
-                        <!-- page_view：浏览 + 停留副行 + title 小字 -->
-                        <template v-if="e.event_name === 'page_view'">
-                          <div>
-                            浏览
-                            <span class="mono-path">{{ e.path || '—' }}</span>
-                          </div>
-                          <div v-if="(e.active_ms ?? 0) > 0" class="stay-line">
-                            停留 {{ formatStay(e.active_ms) }}
-                          </div>
-                          <div v-if="e.title" class="title-line">{{ e.title }}</div>
-                        </template>
-                        <!-- page_stay 独立条目（无匹配 page_view 时） -->
-                        <template v-else-if="e.event_name === 'page_stay'">
-                          <div>
-                            停留
-                            <span class="mono-path">{{ e.path || '—' }}</span>
-                            （{{ formatStay(e.active_ms ?? 0) }}）
-                          </div>
-                          <div v-if="e.title" class="title-line">{{ e.title }}</div>
-                        </template>
-                        <!-- sdk_loaded / 其他自定义事件 -->
-                        <template v-else>
-                          <div>
-                            {{ eventMeta(e.event_name).label }}
-                            <span v-if="e.path" class="mono-path">{{ e.path }}</span>
-                          </div>
-                        </template>
-                      </ElTimelineItem>
-                    </ElTimeline>
+                    <EventTimeline :events="session.events" class="session-timeline" />
                   </div>
                 </div>
               </template>
+              <!-- 失败：请求已结束但无数据对象（首屏加载中不显示，避免闪现） -->
+              <ElEmpty
+                v-else-if="timeline === null && !timelineLoading"
+                description="时间线加载失败"
+                :image-size="80"
+              />
+              <!-- 成功但窗口内无事件 -->
               <ElEmpty
                 v-else-if="!timelineLoading"
                 description="该时间范围内暂无访问轨迹"
@@ -277,40 +248,7 @@
           </div>
 
           <!-- 页面路径视图：事件序列 -->
-          <ElTimeline class="mt-5">
-            <ElTimelineItem
-              v-for="(e, i) in sessionDetail.events"
-              :key="i"
-              :icon="eventMeta(e.event_name).icon"
-              :type="eventMeta(e.event_name).type"
-              :timestamp="formatTime(e.time)"
-            >
-              <template v-if="e.event_name === 'page_view'">
-                <div>
-                  浏览
-                  <span class="mono-path">{{ e.path || '—' }}</span>
-                </div>
-                <div v-if="(e.active_ms ?? 0) > 0" class="stay-line">
-                  停留 {{ formatStay(e.active_ms) }}
-                </div>
-                <div v-if="e.title" class="title-line">{{ e.title }}</div>
-              </template>
-              <template v-else-if="e.event_name === 'page_stay'">
-                <div>
-                  停留
-                  <span class="mono-path">{{ e.path || '—' }}</span>
-                  （{{ formatStay(e.active_ms ?? 0) }}）
-                </div>
-                <div v-if="e.title" class="title-line">{{ e.title }}</div>
-              </template>
-              <template v-else>
-                <div>
-                  {{ eventMeta(e.event_name).label }}
-                  <span v-if="e.path" class="mono-path">{{ e.path }}</span>
-                </div>
-              </template>
-            </ElTimelineItem>
-          </ElTimeline>
+          <EventTimeline :events="sessionDetail.events" class="mt-5" />
           <ElEmpty
             v-if="!sessionDetail.events.length && !sessionLoading"
             description="本会话暂无事件"
@@ -328,8 +266,7 @@
 </template>
 
 <script setup lang="ts">
-  import type { Component } from 'vue'
-  import { Back as BackIcon, Cpu, InfoFilled, Timer, View } from '@element-plus/icons-vue'
+  import { Back as BackIcon } from '@element-plus/icons-vue'
   import {
     getSession,
     getTimeline,
@@ -341,6 +278,7 @@
     type VisitorDetail
   } from '@/api/tracker/visitors'
   import { countryFlag, formatDateTime, formatStay } from '@/utils/tracker'
+  import EventTimeline from './components/EventTimeline.vue'
 
   defineOptions({ name: 'TrackerVisitorDetail' })
 
@@ -437,29 +375,18 @@
   const sessionStayMs = (session: TimelineSession): number =>
     session.events.reduce((sum, e) => sum + (e.active_ms ?? 0), 0)
 
-  /** 时间线会话组来源：session_id 回查详情会话摘要的 referrer/utm；孤立事件组无来源信息 */
+  /** 时间线会话组来源：session_id 回查详情会话摘要的 referrer/utm；孤立事件组/查不到摘要时
+   *  无事实依据，不做"直接访问"断言，显示 —（sessionSourceText 内的"直接访问"是后端同口径语义） */
   const timelineSessionSource = (session: TimelineSession): string => {
     if (!session.session_id) return '—'
     const s = detail.value?.sessions.find((x) => x.session_id === session.session_id)
-    return s ? sessionSourceText(s) : '直接访问'
+    return s ? sessionSourceText(s) : '—'
   }
 
   /** 会话来源：referrer_domain → utm_source → 直接访问 */
   const sessionSourceText = (s: SessionSummary): string =>
     s.referrer_domain || s.utm?.utm_source || '直接访问'
 
-  /** 事件行图标/节点色：page_view=浏览、page_stay=计时、sdk_loaded=加载、其余兜底 */
-  const EVENT_META: Record<
-    string,
-    { icon: Component; type: 'primary' | 'warning' | 'info'; label: string }
-  > = {
-    page_view: { icon: View, type: 'primary', label: '浏览' },
-    page_stay: { icon: Timer, type: 'warning', label: '停留' },
-    sdk_loaded: { icon: Cpu, type: 'info', label: 'SDK 加载' }
-  }
-  const eventMeta = (name: string) =>
-    EVENT_META[name] ?? { icon: InfoFilled, type: 'info', label: name }
-
   // ---------- 会话详情抽屉 ----------
   const drawerVisible = ref(false)
   const sessionLoading = ref(false)
@@ -491,10 +418,11 @@
     const vid = routeVisitorId.value
     if (!vid || vid === loadedVid) return
     loadedVid = vid
-    // 换访客：清抽屉态，时间线 days 保持用户所选范围重新拉取
+    // 换访客：清档案/时间线/抽屉态，防旧访客 ID 在 loading 遮罩下闪现（days 保持所选范围重新拉取）
+    detail.value = null
+    timeline.value = null
     drawerVisible.value = false
     sessionDetail.value = null
-    timeline.value = null
     loadDetail(vid)
     loadTimeline()
   }
@@ -585,18 +513,6 @@
     padding-left: 4px;
   }
 
-  .stay-line {
-    margin-top: 2px;
-    font-size: 12px;
-    color: var(--el-color-warning);
-  }
-
-  .title-line {
-    margin-top: 2px;
-    font-size: 12px;
-    color: var(--el-text-color-secondary);
-  }
-
   :deep(.session-row) {
     cursor: pointer;
   }