diff --git a/src/localization/en.json b/src/localization/en.json
index e1c58304..c73319d1 100644
--- a/src/localization/en.json
+++ b/src/localization/en.json
@@ -102,8 +102,8 @@
             "tab_friend": "Friend",
             "tab_group": "Group",
             "tab_other": "Other",
-            "past_notifications": "Past",
-            "no_new_notifications": "No new notifications"
+            "past_notifications": "Last 24 hours",
+            "no_new_notifications": "No new notifications in the last 24 hours"
         }
     },
     "view": {
diff --git a/src/stores/notification.js b/src/stores/notification.js
index b50c1bb2..903db2e4 100644
--- a/src/stores/notification.js
+++ b/src/stores/notification.js
@@ -134,6 +134,34 @@ export const useNotificationStore = defineStore('Notification', () => {
     const unseenOtherNotifications = computed(() =>
         otherNotifications.value.filter((n) => unseenSet.value.has(n.id))
     );
+    const recentCutoff = computed(() => dayjs().subtract(24, 'hour').valueOf());
+    function getNotificationTs(n) {
+        const raw = n.created_at ?? n.createdAt;
+        if (typeof raw === 'number') return raw > 1e12 ? raw : raw * 1000;
+        const ts = dayjs(raw).valueOf();
+        return Number.isFinite(ts) ? ts : 0;
+    }
+    const recentFriendNotifications = computed(() =>
+        friendNotifications.value.filter(
+            (n) =>
+                !unseenSet.value.has(n.id) &&
+                getNotificationTs(n) > recentCutoff.value
+        )
+    );
+    const recentGroupNotifications = computed(() =>
+        groupNotifications.value.filter(
+            (n) =>
+                !unseenSet.value.has(n.id) &&
+                getNotificationTs(n) > recentCutoff.value
+        )
+    );
+    const recentOtherNotifications = computed(() =>
+        otherNotifications.value.filter(
+            (n) =>
+                !unseenSet.value.has(n.id) &&
+                getNotificationTs(n) > recentCutoff.value
+        )
+    );
     const hasUnseenNotifications = computed(
         () => unseenNotifications.value.length > 0
     );
@@ -2716,6 +2744,9 @@ export const useNotificationStore = defineStore('Notification', () => {
         unseenFriendNotifications,
         unseenGroupNotifications,
         unseenOtherNotifications,
+        recentFriendNotifications,
+        recentGroupNotifications,
+        recentOtherNotifications,
         hasUnseenNotifications,
         getNotificationCategory,
         isNotificationExpired,
diff --git a/src/views/Sidebar/components/NotificationCenterSheet.vue b/src/views/Sidebar/components/NotificationCenterSheet.vue
index f529daa1..e65fa617 100644
--- a/src/views/Sidebar/components/NotificationCenterSheet.vue
+++ b/src/views/Sidebar/components/NotificationCenterSheet.vue
@@ -30,6 +30,7 @@
                 <TabsContent value="friend" class="mt-0 min-h-0 flex-1 overflow-hidden">
                     <NotificationList
                         :notifications="unseenFriendNotifications"
+                        :recent-notifications="recentFriendNotifications"
                         @show-invite-response="showSendInviteResponseDialog"
                         @show-invite-request-response="showSendInviteRequestResponseDialog"
                         @navigate-to-table="navigateToTable" />
@@ -37,6 +38,7 @@
                 <TabsContent value="group" class="mt-0 min-h-0 flex-1 overflow-hidden">
                     <NotificationList
                         :notifications="unseenGroupNotifications"
+                        :recent-notifications="recentGroupNotifications"
                         @show-invite-response="showSendInviteResponseDialog"
                         @show-invite-request-response="showSendInviteRequestResponseDialog"
                         @navigate-to-table="navigateToTable" />
@@ -44,6 +46,7 @@
                 <TabsContent value="other" class="mt-0 min-h-0 flex-1 overflow-hidden">
                     <NotificationList
                         :notifications="unseenOtherNotifications"
+                        :recent-notifications="recentOtherNotifications"
                         @show-invite-response="showSendInviteResponseDialog"
                         @show-invite-request-response="showSendInviteRequestResponseDialog"
                         @navigate-to-table="navigateToTable" />
@@ -78,8 +81,15 @@
     const { refreshInviteMessageTableData } = useInviteStore();
     const { clearInviteImageUpload } = useGalleryStore();
 
-    const { isNotificationCenterOpen, unseenFriendNotifications, unseenGroupNotifications, unseenOtherNotifications } =
-        storeToRefs(useNotificationStore());
+    const {
+        isNotificationCenterOpen,
+        unseenFriendNotifications,
+        unseenGroupNotifications,
+        unseenOtherNotifications,
+        recentFriendNotifications,
+        recentGroupNotifications,
+        recentOtherNotifications
+    } = storeToRefs(useNotificationStore());
 
     const activeTab = ref('friend');
 
diff --git a/src/views/Sidebar/components/NotificationItem.vue b/src/views/Sidebar/components/NotificationItem.vue
index 23c53f23..e9068ee2 100644
--- a/src/views/Sidebar/components/NotificationItem.vue
+++ b/src/views/Sidebar/components/NotificationItem.vue
@@ -9,7 +9,7 @@
             </Avatar>
         </ItemMedia>
         <ItemContent class="min-w-0">
-            <ItemTitle class="min-w-0">
+            <ItemTitle class="min-w-0 w-full">
                 <span class="truncate cursor-pointer" @click.stop="openSender">{{ senderName }}</span>
                 <Badge variant="secondary" class="shrink-0 text-muted-foreground text-[10px]">
                     {{ typeLabel }}
@@ -19,16 +19,18 @@
                     class="ml-auto size-2 shrink-0 rounded-full bg-blue-500" />
             </ItemTitle>
             <TooltipWrapper v-if="displayMessage" side="top" :content="displayMessage" :delay-duration="600">
-                <ItemDescription class="text-xs select-none line-clamp-3">
+                <ItemDescription class="text-xs select-none">
                     {{ displayMessage }}
                 </ItemDescription>
             </TooltipWrapper>
         </ItemContent>
 
         <div class="flex shrink-0 flex-col items-end gap-1">
-            <span class="text-[10px] text-muted-foreground whitespace-nowrap">
-                {{ relativeTime }}
-            </span>
+            <TooltipWrapper v-if="relativeTime" side="top" :content="absoluteTime">
+                <span class="text-[10px] text-muted-foreground whitespace-nowrap">
+                    {{ relativeTime }}
+                </span>
+            </TooltipWrapper>
             <div class="flex items-center gap-1">
                 <template v-if="!isNotificationExpired(notification)">
                     <TooltipWrapper
@@ -160,15 +162,18 @@
 
     const senderName = computed(() => {
         const n = props.notification;
+        if (n.senderUsername && n.senderUsername?.Value === null) {
+            return n.title || n.data?.groupName || n.groupName || n.details?.groupName || '';
+        }
         return n.senderUsername || n.data?.groupName || n.groupName || n.details?.groupName || '';
     });
 
     const avatarUrl = computed(() => {
         const n = props.notification;
-        const userId = n.senderUserId;
+        const userId = typeof n.senderUserId === 'string' ? n.senderUserId : '';
 
         // Group notifications: use details.imageUrl or imageUrl
-        if (userId?.startsWith('grp_') || n.type?.startsWith('group.') || n.type === 'groupChange') {
+        if (userId.startsWith('grp_') || n.type?.startsWith('group.') || n.type === 'groupChange') {
             return n.details?.imageUrl || n.imageUrl || n.senderUserIcon || null;
         }
 
@@ -215,10 +220,16 @@
         return '';
     });
 
+    const createdAtValue = computed(() => props.notification.created_at || props.notification.createdAt);
+
     const relativeTime = computed(() => {
-        const createdAt = props.notification.created_at || props.notification.createdAt;
-        if (!createdAt) return '';
-        return dayjs(createdAt).fromNow(true);
+        if (!createdAtValue.value) return '';
+        return dayjs(createdAtValue.value).fromNow(true);
+    });
+
+    const absoluteTime = computed(() => {
+        if (!createdAtValue.value) return '';
+        return dayjs(createdAtValue.value).format('YYYY-MM-DD HH:mm:ss');
     });
 
     const showDecline = computed(() => {
@@ -291,16 +302,24 @@
     }
 
     function openSender() {
-        const userId = props.notification.senderUserId;
-        if (userId) {
-            if (userId.startsWith('grp_')) {
-                groupStore.showGroupDialog(userId);
-            } else {
-                userStore.showUserDialog(userId);
+        const n = props.notification;
+        const userId = typeof n.senderUserId === 'string' ? n.senderUserId : '';
+
+        // Group notifications: try to find a group ID
+        if (userId.startsWith('grp_') || n.type?.startsWith('group.') || n.type === 'groupChange') {
+            const groupId = userId.startsWith('grp_') ? userId : n.data?.groupId || n.details?.groupId || '';
+            if (groupId) {
+                groupStore.showGroupDialog(groupId);
+                return;
             }
+        }
+
+        if (userId) {
+            userStore.showUserDialog(userId);
             return;
         }
-        const link = props.notification.link;
+
+        const link = n.link;
         if (link) {
             openNotificationLink(link);
         }
diff --git a/src/views/Sidebar/components/NotificationList.vue b/src/views/Sidebar/components/NotificationList.vue
index 5183d388..b6286703 100644
--- a/src/views/Sidebar/components/NotificationList.vue
+++ b/src/views/Sidebar/components/NotificationList.vue
@@ -1,16 +1,36 @@
 <template>
     <div class="flex h-full flex-col overflow-hidden">
         <div class="flex-1 overflow-y-auto">
-            <div v-if="activeNotifications.length" class="flex flex-col gap-0.5 p-2">
+            <div v-if="sortedUnseenNotifications.length" class="flex flex-col gap-0.5 p-2">
                 <NotificationItem
-                    v-for="n in activeNotifications"
-                    :key="n.id || n.type + n.created_at"
+                    v-for="n in sortedUnseenNotifications"
+                    :key="n.id + n.created_at"
                     :notification="n"
                     :is-unseen="true"
                     @show-invite-response="$emit('show-invite-response', $event)"
                     @show-invite-request-response="$emit('show-invite-request-response', $event)" />
             </div>
-            <div v-else class="flex items-center justify-center p-8 text-sm text-muted-foreground">
+
+            <div v-if="sortedRecentNotifications.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 sortedRecentNotifications"
+                        :key="n.id + n.created_at"
+                        :notification="n"
+                        :is-unseen="false" />
+                </div>
+            </div>
+
+            <div
+                v-if="!sortedUnseenNotifications.length && !sortedRecentNotifications.length"
+                class="flex items-center justify-center p-8 text-sm text-muted-foreground">
                 {{ t('side_panel.notification_center.no_new_notifications') }}
             </div>
 
@@ -29,6 +49,7 @@
 
 <script setup>
     import { Button } from '@/components/ui/button';
+    import { Separator } from '@/components/ui/separator';
     import { computed } from 'vue';
     import { useI18n } from 'vue-i18n';
 
@@ -37,7 +58,8 @@
     import NotificationItem from './NotificationItem.vue';
 
     const props = defineProps({
-        notifications: { type: Array, required: true }
+        notifications: { type: Array, required: true },
+        recentNotifications: { type: Array, default: () => [] }
     });
 
     defineEmits(['show-invite-response', 'show-invite-request-response', 'navigate-to-table']);
@@ -46,12 +68,13 @@
 
     function getTs(n) {
         const raw = n?.created_at ?? n?.createdAt;
-        if (typeof raw === 'number') {
-            return raw > 1_000_000_000_000 ? raw : raw * 1000;
-        }
         const ts = dayjs(raw).valueOf();
         return Number.isFinite(ts) ? ts : 0;
     }
 
-    const activeNotifications = computed(() => [...props.notifications].sort((a, b) => getTs(b) - getTs(a)));
+    const sortedUnseenNotifications = computed(() => [...props.notifications].sort((a, b) => getTs(b) - getTs(a)));
+
+    const sortedRecentNotifications = computed(() =>
+        [...props.recentNotifications].sort((a, b) => getTs(b) - getTs(a))
+    );
 </script>