diff --git a/src/stores/notification.js b/src/stores/notification.js
index 90743997..b50c1bb2 100644
--- a/src/stores/notification.js
+++ b/src/stores/notification.js
@@ -124,6 +124,16 @@ export const useNotificationStore = defineStore('Notification', () => {
             (n) => getNotificationCategory(n.type) === 'other'
         )
     );
+    const unseenSet = computed(() => new Set(unseenNotifications.value));
+    const unseenFriendNotifications = computed(() =>
+        friendNotifications.value.filter((n) => unseenSet.value.has(n.id))
+    );
+    const unseenGroupNotifications = computed(() =>
+        groupNotifications.value.filter((n) => unseenSet.value.has(n.id))
+    );
+    const unseenOtherNotifications = computed(() =>
+        otherNotifications.value.filter((n) => unseenSet.value.has(n.id))
+    );
     const hasUnseenNotifications = computed(
         () => unseenNotifications.value.length > 0
     );
@@ -2703,6 +2713,9 @@ export const useNotificationStore = defineStore('Notification', () => {
         friendNotifications,
         groupNotifications,
         otherNotifications,
+        unseenFriendNotifications,
+        unseenGroupNotifications,
+        unseenOtherNotifications,
         hasUnseenNotifications,
         getNotificationCategory,
         isNotificationExpired,
diff --git a/src/views/Sidebar/components/NotificationCenterSheet.vue b/src/views/Sidebar/components/NotificationCenterSheet.vue
index 1000bdb4..f529daa1 100644
--- a/src/views/Sidebar/components/NotificationCenterSheet.vue
+++ b/src/views/Sidebar/components/NotificationCenterSheet.vue
@@ -10,43 +10,40 @@
                 <TabsList class="mr-4 ml-2 mt-2 grid w-auto grid-cols-3">
                     <TabsTrigger value="friend">
                         {{ t('side_panel.notification_center.tab_friend') }}
-                        <span v-if="activeCount.friend" class="ml-1 text-xs text-muted-foreground">
-                            ({{ activeCount.friend }})
+                        <span v-if="unseenFriendNotifications.length" class="ml-1 text-xs text-muted-foreground">
+                            ({{ unseenFriendNotifications.length }})
                         </span>
                     </TabsTrigger>
                     <TabsTrigger value="group">
                         {{ t('side_panel.notification_center.tab_group') }}
-                        <span v-if="activeCount.group" class="ml-1 text-xs text-muted-foreground">
-                            ({{ activeCount.group }})
+                        <span v-if="unseenGroupNotifications.length" class="ml-1 text-xs text-muted-foreground">
+                            ({{ unseenGroupNotifications.length }})
                         </span>
                     </TabsTrigger>
                     <TabsTrigger value="other">
                         {{ t('side_panel.notification_center.tab_other') }}
-                        <span v-if="activeCount.other" class="ml-1 text-xs text-muted-foreground">
-                            ({{ activeCount.other }})
+                        <span v-if="unseenOtherNotifications.length" class="ml-1 text-xs text-muted-foreground">
+                            ({{ unseenOtherNotifications.length }})
                         </span>
                     </TabsTrigger>
                 </TabsList>
                 <TabsContent value="friend" class="mt-0 min-h-0 flex-1 overflow-hidden">
                     <NotificationList
-                        :notifications="friendNotifications"
-                        :unseen-ids="unseenNotifications"
+                        :notifications="unseenFriendNotifications"
                         @show-invite-response="showSendInviteResponseDialog"
                         @show-invite-request-response="showSendInviteRequestResponseDialog"
                         @navigate-to-table="navigateToTable" />
                 </TabsContent>
                 <TabsContent value="group" class="mt-0 min-h-0 flex-1 overflow-hidden">
                     <NotificationList
-                        :notifications="groupNotifications"
-                        :unseen-ids="unseenNotifications"
+                        :notifications="unseenGroupNotifications"
                         @show-invite-response="showSendInviteResponseDialog"
                         @show-invite-request-response="showSendInviteRequestResponseDialog"
                         @navigate-to-table="navigateToTable" />
                 </TabsContent>
                 <TabsContent value="other" class="mt-0 min-h-0 flex-1 overflow-hidden">
                     <NotificationList
-                        :notifications="otherNotifications"
-                        :unseen-ids="unseenNotifications"
+                        :notifications="unseenOtherNotifications"
                         @show-invite-response="showSendInviteResponseDialog"
                         @show-invite-request-response="showSendInviteRequestResponseDialog"
                         @navigate-to-table="navigateToTable" />
@@ -65,7 +62,7 @@
 <script setup>
     import { Sheet, SheetContent, SheetHeader, SheetTitle } from '@/components/ui/sheet';
     import { Tabs, TabsContent, TabsList, TabsTrigger } from '@/components/ui/tabs';
-    import { computed, ref } from 'vue';
+    import { ref } from 'vue';
     import { storeToRefs } from 'pinia';
     import { useI18n } from 'vue-i18n';
     import { useRouter } from 'vue-router';
@@ -81,22 +78,11 @@
     const { refreshInviteMessageTableData } = useInviteStore();
     const { clearInviteImageUpload } = useGalleryStore();
 
-    const {
-        isNotificationCenterOpen,
-        friendNotifications,
-        groupNotifications,
-        otherNotifications,
-        unseenNotifications
-    } = storeToRefs(useNotificationStore());
+    const { isNotificationCenterOpen, unseenFriendNotifications, unseenGroupNotifications, unseenOtherNotifications } =
+        storeToRefs(useNotificationStore());
 
     const activeTab = ref('friend');
 
-    const activeCount = computed(() => ({
-        friend: friendNotifications.value.length,
-        group: groupNotifications.value.length,
-        other: otherNotifications.value.length
-    }));
-
     // Dialog state
     const sendInviteResponseDialog = ref({
         messageSlot: {},
diff --git a/src/views/Sidebar/components/NotificationList.vue b/src/views/Sidebar/components/NotificationList.vue
index 72be4dbc..5183d388 100644
--- a/src/views/Sidebar/components/NotificationList.vue
+++ b/src/views/Sidebar/components/NotificationList.vue
@@ -6,7 +6,7 @@
                     v-for="n in activeNotifications"
                     :key="n.id || n.type + n.created_at"
                     :notification="n"
-                    :is-unseen="unseenIds.includes(n.id)"
+                    :is-unseen="true"
                     @show-invite-response="$emit('show-invite-response', $event)"
                     @show-invite-request-response="$emit('show-invite-request-response', $event)" />
             </div>
@@ -14,22 +14,6 @@
                 {{ t('side_panel.notification_center.no_new_notifications') }}
             </div>
 
-            <template v-if="expiredNotifications.length">
-                <div class="flex items-center gap-2 px-4 py-2">
-                    <Separator class="flex-1" />
-                    <span class="shrink-0 text-[10px] text-muted-foreground uppercase tracking-wider">
-                        {{ t('side_panel.notification_center.past_notifications') }}
-                    </span>
-                    <Separator class="flex-1" />
-                </div>
-                <div class="flex flex-col gap-0.5 px-2 pb-2">
-                    <NotificationItem
-                        v-for="n in expiredNotifications"
-                        :key="n.id || n.type + n.created_at"
-                        :notification="n"
-                        :is-unseen="false" />
-                </div>
-            </template>
             <div class="flex justify-center py-3">
                 <Button
                     variant="ghost"
@@ -45,7 +29,6 @@
 
 <script setup>
     import { Button } from '@/components/ui/button';
-    import { Separator } from '@/components/ui/separator';
     import { computed } from 'vue';
     import { useI18n } from 'vue-i18n';
 
@@ -54,8 +37,7 @@
     import NotificationItem from './NotificationItem.vue';
 
     const props = defineProps({
-        notifications: { type: Array, required: true },
-        unseenIds: { type: Array, default: () => [] }
+        notifications: { type: Array, required: true }
     });
 
     defineEmits(['show-invite-response', 'show-invite-request-response', 'navigate-to-table']);
@@ -71,15 +53,5 @@
         return Number.isFinite(ts) ? ts : 0;
     }
 
-    const sortedNotifications = computed(() => [...props.notifications].sort((a, b) => getTs(b) - getTs(a)));
-
-    const activeNotifications = computed(() =>
-        sortedNotifications.value.filter((n) => getTs(n) > dayjs().subtract(1, 'week').valueOf())
-    );
-
-    const MAX_EXPIRED = 20;
-
-    const expiredNotifications = computed(() =>
-        sortedNotifications.value.filter((n) => getTs(n) <= dayjs().subtract(1, 'week').valueOf()).slice(0, MAX_EXPIRED)
-    );
+    const activeNotifications = computed(() => [...props.notifications].sort((a, b) => getTs(b) - getTs(a)));
 </script>