diff --git a/src/views/im/home/components/ContextMenu.vue b/src/views/im/home/components/ContextMenu.vue
index ae7fb8844..1705c54ac 100644
--- a/src/views/im/home/components/ContextMenu.vue
+++ b/src/views/im/home/components/ContextMenu.vue
@@ -76,7 +76,8 @@ const adjustedPosition = computed(() => {
       x = window.innerWidth - menuWidth
     }
   }
-  return { x, y }
+  // 视口很小 / 菜单项很多时上面减法会算出负值，把菜单顶 / 左边推到 0 兜底
+  return { x: Math.max(0, x), y: Math.max(0, y) }
 })
 
 type MenuItem = (typeof contextMenu.value.items)[number]
diff --git a/src/views/im/home/components/user/UserInfo.vue b/src/views/im/home/components/user/UserInfo.vue
index 8213bbfd1..b0ae6e3c5 100644
--- a/src/views/im/home/components/user/UserInfo.vue
+++ b/src/views/im/home/components/user/UserInfo.vue
@@ -386,7 +386,11 @@ async function handleBlock() {
     return
   }
   const target = props.user
-  await message.confirm(`确定将「${target.nickname || ''}」加入黑名单吗？`, '加入黑名单')
+  try {
+    await message.confirm(`确定将「${target.nickname || ''}」加入黑名单吗？`, '加入黑名单')
+  } catch {
+    return
+  }
   await friendStore.blockFriend(target.id)
   message.success('已加入黑名单')
 }
diff --git a/src/views/im/home/pages/conversation/components/input/MentionPicker.vue b/src/views/im/home/pages/conversation/components/input/MentionPicker.vue
index 3db535771..72e21a4d3 100644
--- a/src/views/im/home/pages/conversation/components/input/MentionPicker.vue
+++ b/src/views/im/home/pages/conversation/components/input/MentionPicker.vue
@@ -52,8 +52,11 @@
       />
     </el-scrollbar>
 
-    <!-- 底部三角指针：旋转 45° 的方块半露出底边，指向输入区里的 @ 字符 -->
-    <div class="absolute left-4 -bottom-1.5 w-3 h-3 rotate-45 bg-[var(--el-bg-color)]"></div>
+    <!-- 三角指针：picker 在 @ 下方（position.top 锚定）→ 箭头朝上贴顶；picker 在 @ 上方（position.bottom 锚定）→ 箭头朝下贴底 -->
+    <div
+      class="absolute left-4 w-3 h-3 rotate-45 bg-[var(--el-bg-color)]"
+      :class="position.top != null ? '-top-1.5' : '-bottom-1.5'"
+    ></div>
   </div>
 </template>
 
diff --git a/src/views/im/home/pages/conversation/components/message/GroupPinnedMessage.vue b/src/views/im/home/pages/conversation/components/message/GroupPinnedMessage.vue
index 9cc2641b0..48e9b1b98 100644
--- a/src/views/im/home/pages/conversation/components/message/GroupPinnedMessage.vue
+++ b/src/views/im/home/pages/conversation/components/message/GroupPinnedMessage.vue
@@ -60,7 +60,7 @@
 </template>
 
 <script lang="ts" setup>
-import { computed, ref } from 'vue'
+import { computed, ref, watch } from 'vue'
 import Icon from '@/components/Icon/src/Icon.vue'
 import { useMessage } from '@/hooks/web/useMessage'
 import { ImConversationType, ImGroupMemberRole } from '@/views/im/utils/constants'
@@ -93,6 +93,15 @@ const group = computed(() => groupStore.getGroup(props.groupId))
 const expanded = ref(false)
 const removingId = ref<number | null>(null)
 
+// 切群时重置展开 / 移除中状态：本地 ref 不跟随 groupId，否则上一群"展开"或"移除中"会带到新群
+watch(
+  () => props.groupId,
+  () => {
+    expanded.value = false
+    removingId.value = null
+  }
+)
+
 /** 当前群置顶消息列表（直接走 group.value，跟随响应式） */
 const pinnedMessages = computed<Message[]>(() => group.value?.pinnedMessages ?? [])
 
diff --git a/src/views/im/home/pages/conversation/components/message/MessageBubble.vue b/src/views/im/home/pages/conversation/components/message/MessageBubble.vue
index 69ccfe317..baf77c786 100644
--- a/src/views/im/home/pages/conversation/components/message/MessageBubble.vue
+++ b/src/views/im/home/pages/conversation/components/message/MessageBubble.vue
@@ -322,7 +322,8 @@ function handleFileClick() {
   if (isUploading.value || !filePayload.value?.url) {
     return
   }
-  window.open(filePayload.value.url, '_blank')
+  // noopener,noreferrer 切断新窗口对原页面的 window.opener 引用，防 Tabnabbing
+  window.open(filePayload.value.url, '_blank', 'noopener,noreferrer')
 }
 
 /** 语音点击：托管给 useVoicePlayer 全局互斥播放，新点的语音会停掉旧的 */
diff --git a/src/views/im/manager/group/components/GroupSelectDialog.vue b/src/views/im/manager/group/components/GroupSelectDialog.vue
index 47be03e3e..5c1111f37 100644
--- a/src/views/im/manager/group/components/GroupSelectDialog.vue
+++ b/src/views/im/manager/group/components/GroupSelectDialog.vue
@@ -198,14 +198,14 @@ const getList = async () => {
     list.value = data.list
     total.value = data.total
     await nextTick()
-    applyPreSelection()
+    await applyPreSelection()
   } finally {
     loading.value = false
   }
 }
 
-/** 恢复预选状态（当前页可见范围内） */
-const applyPreSelection = () => {
+/** 恢复预选状态：当前页命中直接复用 row，否则单选时调单条详情接口补齐（防已选群不在第一页时确认报"请选择"） */
+const applyPreSelection = async () => {
   if (preSelectedIds.value.length === 0) {
     return
   }
@@ -219,12 +219,24 @@ const applyPreSelection = () => {
         table.toggleRowSelection(row, true)
       }
     })
-  } else {
-    const match = list.value.find((row) => preSelectedIds.value.includes(row.id))
-    if (match) {
-      selectedRadioId.value = match.id
-      currentRadioRow.value = match
+    return
+  }
+  const targetId = preSelectedIds.value[0]
+  const match = list.value.find((row) => row.id === targetId)
+  if (match) {
+    selectedRadioId.value = match.id
+    currentRadioRow.value = match
+    return
+  }
+  // 已选群不在当前页可见范围 → 走详情接口补齐，让 currentRadioRow 至少有 id + 名字给 confirmSelect 用
+  try {
+    const detail = await ManagerGroupApi.getManagerGroup(targetId)
+    if (detail) {
+      selectedRadioId.value = detail.id
+      currentRadioRow.value = detail
     }
+  } catch (e) {
+    console.warn('[GroupSelectDialog] 预选群详情拉取失败', { targetId }, e)
   }
 }
 
diff --git a/src/views/im/manager/message/MessageContentPreview.vue b/src/views/im/manager/message/MessageContentPreview.vue
index ea2d0ec88..59458addd 100644
--- a/src/views/im/manager/message/MessageContentPreview.vue
+++ b/src/views/im/manager/message/MessageContentPreview.vue
@@ -227,7 +227,8 @@ const mergePreviewLines = computed(() => {
 function openVideo() {
   const url = videoPayload.value?.url
   if (url) {
-    window.open(url, '_blank')
+    // noopener,noreferrer 切断新窗口对原页面的 window.opener 引用，防 Tabnabbing
+    window.open(url, '_blank', 'noopener,noreferrer')
   }
 }