diff --git a/src/components/GroupedHistoryView/ProjectDialog.tsx b/src/components/GroupedHistoryView/ProjectDialog.tsx
index c9c8db6f1..afd7b3059 100644
--- a/src/components/GroupedHistoryView/ProjectDialog.tsx
+++ b/src/components/GroupedHistoryView/ProjectDialog.tsx
@@ -22,7 +22,7 @@ import {
 } from '@/components/ui/dialog';
 import { Input } from '@/components/ui/input';
 import { useProjectStore } from '@/store/projectStore';
-import { ProjectGroup } from '@/types/history';
+import { HistoryTask, ProjectGroup } from '@/types/history';
 import {
   CheckCircle,
   Clock,
@@ -46,7 +46,7 @@ interface ProjectDialogProps {
     historyId: string,
     project?: ProjectGroup
   ) => void;
-  onTaskDelete: (taskId: string) => void;
+  onTaskDelete: (historyId: string, task?: HistoryTask) => void;
   onTaskShare: (taskId: string) => void;
   activeTaskId?: string;
 }
@@ -256,8 +256,12 @@ export default function ProjectDialog({
                         project
                       )
                     }
-                    onDelete={() => onTaskDelete(task.id.toString())}
-                    onShare={() => onTaskShare(task.id.toString())}
+                    onDelete={() =>
+                      onTaskDelete(task.id.toString(), task)
+                    }
+                    onShare={() =>
+                      onTaskShare(task.task_id || task.id.toString())
+                    }
                     isLast={index === project.tasks.length - 1}
                     showActions={false}
                   />
diff --git a/src/components/GroupedHistoryView/ProjectGroup.tsx b/src/components/GroupedHistoryView/ProjectGroup.tsx
index 3980a6671..8383d8784 100644
--- a/src/components/GroupedHistoryView/ProjectGroup.tsx
+++ b/src/components/GroupedHistoryView/ProjectGroup.tsx
@@ -25,7 +25,7 @@ import useChatStoreAdapter from '@/hooks/useChatStoreAdapter';
 import { loadProjectFromHistory } from '@/lib/replay';
 import { useProjectStore } from '@/store/projectStore';
 import { ChatTaskStatus } from '@/types/constants';
-import { ProjectGroup as ProjectGroupType } from '@/types/history';
+import { HistoryTask, ProjectGroup as ProjectGroupType } from '@/types/history';
 import { motion } from 'framer-motion';
 import {
   Edit,
@@ -51,7 +51,7 @@ interface ProjectGroupProps {
     historyId: string,
     project?: ProjectGroupType
   ) => void;
-  onTaskDelete: (taskId: string) => void;
+  onTaskDelete: (historyId: string, task?: HistoryTask) => void;
   onTaskShare: (taskId: string) => void;
   activeTaskId?: string;
   searchValue?: string;
diff --git a/src/components/GroupedHistoryView/index.tsx b/src/components/GroupedHistoryView/index.tsx
index 25528d829..08a37645d 100644
--- a/src/components/GroupedHistoryView/index.tsx
+++ b/src/components/GroupedHistoryView/index.tsx
@@ -19,7 +19,7 @@ import { fetchGroupedHistoryTasks } from '@/service/historyApi';
 import { getAuthStore } from '@/store/authStore';
 import { useGlobalStore } from '@/store/globalStore';
 import { useProjectStore } from '@/store/projectStore';
-import { ProjectGroup as ProjectGroupType } from '@/types/history';
+import { HistoryTask, ProjectGroup as ProjectGroupType } from '@/types/history';
 import { AnimatePresence, motion } from 'framer-motion';
 import { FolderOpen, LayoutGrid, List, Pin, Sparkle } from 'lucide-react';
 import { useEffect, useState } from 'react';
@@ -34,7 +34,11 @@ interface GroupedHistoryViewProps {
     historyId: string,
     project?: ProjectGroupType
   ) => void;
-  onTaskDelete: (historyId: string, callback: () => void) => void;
+  onTaskDelete: (
+    historyId: string,
+    task: HistoryTask | undefined,
+    callback: () => void
+  ) => void;
   onTaskShare: (taskId: string) => void;
   activeTaskId?: string;
   refreshTrigger?: number; // For triggering refresh from parent
@@ -82,9 +86,12 @@ export default function GroupedHistoryView({
     }
   };
 
-  const onDelete = (historyId: string) => {
+  const onDelete = (historyId: string, task?: HistoryTask) => {
     try {
-      onTaskDelete(historyId, () => {
+      const targetTask = task ?? projects.flatMap((p) => p.tasks).find(
+        (t) => String(t.id) === historyId
+      );
+      onTaskDelete(historyId, targetTask, () => {
         setProjects((prevProjects) => {
           // Create new project objects instead of mutating existing ones
           return prevProjects
diff --git a/src/components/SearchHistoryDialog.tsx b/src/components/SearchHistoryDialog.tsx
index 1e33a03fc..bdd85f6ac 100644
--- a/src/components/SearchHistoryDialog.tsx
+++ b/src/components/SearchHistoryDialog.tsx
@@ -14,9 +14,7 @@
 
 'use client';
 
-import { ScanFace, Search } from 'lucide-react';
-import { useEffect, useState } from 'react';
-
+import { proxyFetchDelete } from '@/api/http';
 import GroupedHistoryView from '@/components/GroupedHistoryView';
 import {
   CommandDialog,
@@ -29,18 +27,57 @@ import {
 } from '@/components/ui/command';
 import useChatStoreAdapter from '@/hooks/useChatStoreAdapter';
 import { loadProjectFromHistory } from '@/lib';
+import { share } from '@/lib/share';
 import { fetchHistoryTasks } from '@/service/historyApi';
+import { getAuthStore } from '@/store/authStore';
 import { useGlobalStore } from '@/store/globalStore';
+import { HistoryTask } from '@/types/history';
 import { VisuallyHidden } from '@radix-ui/react-visually-hidden';
+import { Ellipsis, ScanFace, Search, Share2, Trash2 } from 'lucide-react';
+import { useEffect, useState } from 'react';
 import { useTranslation } from 'react-i18next';
 import { useNavigate } from 'react-router-dom';
+import { toast } from 'sonner';
+import AlertDialog from '@/components/ui/alertDialog';
 import { Button } from './ui/button';
 import { DialogTitle } from './ui/dialog';
+import {
+  DropdownMenu,
+  DropdownMenuContent,
+  DropdownMenuItem,
+  DropdownMenuTrigger,
+} from './ui/dropdown-menu';
+
+type IpcRendererLike = {
+  invoke: (
+    channel: string,
+    email: string,
+    taskId: string,
+    projectId?: string
+  ) => Promise<void>;
+};
+
+function getIpcRenderer(): IpcRendererLike | undefined {
+  const w = window as unknown as { ipcRenderer?: IpcRendererLike };
+  return w.ipcRenderer;
+}
+
+type HistoryListItem = HistoryTask & {
+  tasks?: { task_id: string }[];
+  project_name?: string;
+  project_id?: string;
+};
 
 export function SearchHistoryDialog() {
   const { t } = useTranslation();
   const [open, setOpen] = useState(false);
-  const [historyTasks, setHistoryTasks] = useState<any[]>([]);
+  const [historyTasks, setHistoryTasks] = useState<HistoryListItem[]>([]);
+  const [deleteDialogOpen, setDeleteDialogOpen] = useState(false);
+  const [pendingDelete, setPendingDelete] = useState<{
+    historyId: string;
+    task: HistoryTask | undefined;
+    callback: () => void;
+  } | null>(null);
   const { history_type } = useGlobalStore();
   //Get Chatstore for the active project's task
   const { chatStore, projectStore } = useChatStoreAdapter();
@@ -75,14 +112,60 @@ export function SearchHistoryDialog() {
     }
   };
 
-  const handleDelete = (taskId: string) => {
-    // TODO: Implement delete functionality similar to HistorySidebar
-    console.log('Delete task:', taskId);
+  const handleDelete = async (
+    historyId: string,
+    task: HistoryTask | undefined,
+    callback: () => void
+  ) => {
+    try {
+      await proxyFetchDelete(`/api/chat/history/${historyId}`);
+
+      const ipcRenderer = getIpcRenderer();
+      if (task?.task_id && ipcRenderer) {
+        const { email } = getAuthStore();
+        const safeEmail = email ?? '';
+        try {
+          await ipcRenderer.invoke(
+            'delete-task-files',
+            safeEmail,
+            task.task_id,
+            task.project_id
+          );
+        } catch (error) {
+          console.warn('Local file cleanup failed:', error);
+        }
+      }
+
+      callback();
+      toast.success(t('layout.delete-success') || 'Task deleted successfully');
+    } catch (error) {
+      console.error('Failed to delete history task:', error);
+      toast.error(t('layout.delete-failed') || 'Failed to delete task');
+    }
+  };
+
+  const handleShare = async (taskId: string) => {
+    setOpen(false);
+    await share(taskId);
+  };
+
+  const openDeleteConfirm = (
+    historyId: string,
+    task: HistoryTask | undefined,
+    callback: () => void
+  ) => {
+    setPendingDelete({ historyId, task, callback });
+    setDeleteDialogOpen(true);
   };
 
-  const handleShare = (taskId: string) => {
-    // TODO: Implement share functionality similar to HistorySidebar
-    console.log('Share task:', taskId);
+  const confirmDelete = () => {
+    if (!pendingDelete) return;
+    void handleDelete(
+      pendingDelete.historyId,
+      pendingDelete.task,
+      pendingDelete.callback
+    );
+    setPendingDelete(null);
   };
 
   useEffect(() => {
@@ -122,26 +205,67 @@ export function SearchHistoryDialog() {
             </div>
           ) : (
             <CommandGroup heading="Today">
-              {historyTasks.map((task) => (
+              {historyTasks.map((task: HistoryListItem) => (
                 <CommandItem
                   key={task.id}
-                  className="cursor-pointer"
-                  /**
-                   * TODO(history): Update to use project_id field
-                   * after update instead.
-                   */
+                  className="flex cursor-pointer items-center justify-between gap-2"
                   onSelect={() =>
                     handleSetActive(
-                      task.task_id,
+                      task.project_id || task.task_id,
                       task.question,
-                      String(task.id)
+                      String(task.id),
+                      {
+                        tasks: task.tasks || [{ task_id: task.task_id }],
+                        project_name: task.project_name,
+                      }
                     )
                   }
                 >
-                  <ScanFace />
-                  <div className="overflow-hidden text-ellipsis whitespace-nowrap">
-                    {task.question}
+                  <div className="flex min-w-0 flex-1 items-center gap-2">
+                    <ScanFace className="h-4 w-4 flex-shrink-0" />
+                    <span className="overflow-hidden text-ellipsis whitespace-nowrap">
+                      {task.question}
+                    </span>
                   </div>
+                  <DropdownMenu>
+                    <DropdownMenuTrigger asChild>
+                      <Button
+                        variant="ghost"
+                        size="icon"
+                        className="h-7 w-7 flex-shrink-0"
+                        onClick={(e: any) => e.stopPropagation()}
+                      >
+                        <Ellipsis className="h-4 w-4" />
+                      </Button>
+                    </DropdownMenuTrigger>
+                    <DropdownMenuContent align="end">
+                      <DropdownMenuItem
+                        onClick={(e: any) => {
+                          e.stopPropagation();
+                          handleShare(task.task_id || String(task.id));
+                        }}
+                      >
+                        <Share2 className="mr-2 h-4 w-4" />
+                        {t('layout.share')}
+                      </DropdownMenuItem>
+                      <DropdownMenuItem
+                        className="text-text-cuation"
+                        onClick={async (e: any) => {
+                          e.stopPropagation();
+                          openDeleteConfirm(String(task.id), task, () => {
+                            setHistoryTasks((prev: HistoryListItem[]) =>
+                              prev.filter(
+                                (t: HistoryListItem) => t.id !== task.id
+                              )
+                            );
+                          });
+                        }}
+                      >
+                        <Trash2 className="mr-2 h-4 w-4" />
+                        {t('layout.delete')}
+                      </DropdownMenuItem>
+                    </DropdownMenuContent>
+                  </DropdownMenu>
                 </CommandItem>
               ))}
             </CommandGroup>
@@ -149,6 +273,19 @@ export function SearchHistoryDialog() {
           <CommandSeparator />
         </CommandList>
       </CommandDialog>
+      <AlertDialog
+        isOpen={deleteDialogOpen}
+        onClose={() => {
+          setDeleteDialogOpen(false);
+          setPendingDelete(null);
+        }}
+        onConfirm={confirmDelete}
+        title={t('layout.delete-task')}
+        message={t('layout.delete-task-confirmation')}
+        confirmText={t('layout.delete')}
+        cancelText={t('layout.cancel')}
+        confirmVariant="cuation"
+      />
     </>
   );
 }
diff --git a/src/i18n/locales/ar/layout.json b/src/i18n/locales/ar/layout.json
index ae10e2abd..bebd4640f 100644
--- a/src/i18n/locales/ar/layout.json
+++ b/src/i18n/locales/ar/layout.json
@@ -52,6 +52,8 @@
   "welcome": "أهلاً وسهلاً",
   "delete-task": "حذف المهمة",
   "delete-task-confirmation": "هل أنت متأكد من أنك تريد حذف هذه المهمة؟ لا يمكن التراجع عن هذا الإجراء.",
+  "delete-success": "تم حذف المهمة بنجاح",
+  "delete-failed": "فشل حذف المهمة",
   "delete": "حذف",
   "cancel": "إلغاء",
   "continue": "متابعة",
diff --git a/src/i18n/locales/de/layout.json b/src/i18n/locales/de/layout.json
index d6f78e435..553cca29c 100644
--- a/src/i18n/locales/de/layout.json
+++ b/src/i18n/locales/de/layout.json
@@ -52,6 +52,8 @@
   "welcome": "Willkommen",
   "delete-task": "Aufgabe löschen",
   "delete-task-confirmation": "Sind Sie sicher, dass Sie diese Aufgabe löschen möchten? Diese Aktion kann nicht rückgängig gemacht werden.",
+  "delete-success": "Aufgabe erfolgreich gelöscht",
+  "delete-failed": "Aufgabe konnte nicht gelöscht werden",
   "delete": "Löschen",
   "cancel": "Abbrechen",
   "continue": "Fortfahren",
diff --git a/src/i18n/locales/en-us/layout.json b/src/i18n/locales/en-us/layout.json
index f56d4ebc4..067f7be6c 100644
--- a/src/i18n/locales/en-us/layout.json
+++ b/src/i18n/locales/en-us/layout.json
@@ -53,6 +53,8 @@
   "welcome": "Welcome",
   "delete-task": "Delete Task",
   "delete-task-confirmation": "Are you sure you want to delete this task? This action cannot be undone.",
+  "delete-success": "Task deleted successfully",
+  "delete-failed": "Failed to delete task",
   "delete": "Delete",
   "cancel": "Cancel",
   "continue": "Continue",
diff --git a/src/i18n/locales/es/layout.json b/src/i18n/locales/es/layout.json
index 164cdb25e..046c04f5b 100644
--- a/src/i18n/locales/es/layout.json
+++ b/src/i18n/locales/es/layout.json
@@ -52,6 +52,8 @@
   "welcome": "Bienvenido",
   "delete-task": "Eliminar Tarea",
   "delete-task-confirmation": "¿Estás seguro de que quieres eliminar esta tarea? Esta acción no se puede deshacer.",
+  "delete-success": "Tarea eliminada correctamente",
+  "delete-failed": "No se pudo eliminar la tarea",
   "delete": "Eliminar",
   "cancel": "Cancelar",
   "continue": "Continuar",
diff --git a/src/i18n/locales/fr/layout.json b/src/i18n/locales/fr/layout.json
index 562de3fc5..1785cd3a2 100644
--- a/src/i18n/locales/fr/layout.json
+++ b/src/i18n/locales/fr/layout.json
@@ -52,6 +52,8 @@
   "welcome": "Bienvenue",
   "delete-task": "Supprimer la Tâche",
   "delete-task-confirmation": "Êtes-vous sûr de vouloir supprimer cette tâche ? Cette action ne peut pas être annulée.",
+  "delete-success": "Tâche supprimée avec succès",
+  "delete-failed": "Échec de la suppression de la tâche",
   "delete": "Supprimer",
   "cancel": "Annuler",
   "continue": "Continuer",
diff --git a/src/i18n/locales/it/layout.json b/src/i18n/locales/it/layout.json
index 29289b3ba..7b7fe7e1d 100644
--- a/src/i18n/locales/it/layout.json
+++ b/src/i18n/locales/it/layout.json
@@ -52,6 +52,8 @@
   "welcome": "Benvenuto",
   "delete-task": "Elimina Attività",
   "delete-task-confirmation": "Sei sicuro di voler eliminare questa attività? Questa azione non può essere annullata.",
+  "delete-success": "Attività eliminata con successo",
+  "delete-failed": "Impossibile eliminare l'attività",
   "delete": "Elimina",
   "cancel": "Annulla",
   "continue": "Continua",
diff --git a/src/i18n/locales/ja/layout.json b/src/i18n/locales/ja/layout.json
index cdbdcddb3..1e09c1e2e 100644
--- a/src/i18n/locales/ja/layout.json
+++ b/src/i18n/locales/ja/layout.json
@@ -52,6 +52,8 @@
   "welcome": "ようこそ",
   "delete-task": "タスクを削除",
   "delete-task-confirmation": "このタスクを削除してもよろしいですか？この操作は元に戻せません。",
+  "delete-success": "タスクを削除しました",
+  "delete-failed": "タスクの削除に失敗しました",
   "delete": "削除",
   "cancel": "キャンセル",
   "continue": "続行",
diff --git a/src/i18n/locales/ko/layout.json b/src/i18n/locales/ko/layout.json
index 8d63e507b..8681d8823 100644
--- a/src/i18n/locales/ko/layout.json
+++ b/src/i18n/locales/ko/layout.json
@@ -52,6 +52,8 @@
   "welcome": "환영",
   "delete-task": "작업 삭제",
   "delete-task-confirmation": "이 작업을 삭제하시겠습니까? 이 작업은 되돌릴 수 없습니다.",
+  "delete-success": "작업이 삭제되었습니다",
+  "delete-failed": "작업 삭제에 실패했습니다",
   "delete": "삭제",
   "cancel": "취소",
   "continue": "계속",
diff --git a/src/i18n/locales/ru/layout.json b/src/i18n/locales/ru/layout.json
index 07079bd04..5d08b8ebc 100644
--- a/src/i18n/locales/ru/layout.json
+++ b/src/i18n/locales/ru/layout.json
@@ -52,6 +52,8 @@
   "welcome": "Добро пожаловать",
   "delete-task": "Удалить задачу",
   "delete-task-confirmation": "Вы уверены, что хотите удалить эту задачу? Это действие нельзя отменить.",
+  "delete-success": "Задача удалена",
+  "delete-failed": "Не удалось удалить задачу",
   "delete": "Удалить",
   "cancel": "Отмена",
   "continue": "Продолжить",
diff --git a/src/i18n/locales/zh-Hans/layout.json b/src/i18n/locales/zh-Hans/layout.json
index ce7bce0cb..8ba7d4da1 100644
--- a/src/i18n/locales/zh-Hans/layout.json
+++ b/src/i18n/locales/zh-Hans/layout.json
@@ -55,6 +55,8 @@
   "welcome": "欢迎",
   "delete-task": "删除任务",
   "delete-task-confirmation": "您确定要删除此任务吗？此操作无法撤销。",
+  "delete-success": "任务删除成功",
+  "delete-failed": "删除任务失败",
   "delete": "删除",
   "cancel": "取消",
   "continue": "继续",
diff --git a/src/i18n/locales/zh-Hant/layout.json b/src/i18n/locales/zh-Hant/layout.json
index 184a24ab5..3aacdd2de 100644
--- a/src/i18n/locales/zh-Hant/layout.json
+++ b/src/i18n/locales/zh-Hant/layout.json
@@ -54,6 +54,8 @@
   "welcome": "歡迎",
   "delete-task": "刪除任務",
   "delete-task-confirmation": "您確定要刪除此任務嗎？此操作無法撤銷。",
+  "delete-success": "任務已成功刪除",
+  "delete-failed": "刪除任務失敗",
   "delete": "刪除",
   "cancel": "取消",
   "continue": "繼續",
diff --git a/src/pages/Projects/Project.tsx b/src/pages/Projects/Project.tsx
index dce96a3c7..ff3e5aa58 100644
--- a/src/pages/Projects/Project.tsx
+++ b/src/pages/Projects/Project.tsx
@@ -19,6 +19,7 @@ import useChatStoreAdapter from '@/hooks/useChatStoreAdapter';
 import { loadProjectFromHistory } from '@/lib';
 import { share } from '@/lib/share';
 import { fetchHistoryTasks } from '@/service/historyApi';
+import { HistoryTask } from '@/types/history';
 import { ChatTaskStatus } from '@/types/constants';
 import { Bird, CodeXml, FileText, Globe, Image } from 'lucide-react';
 import { useEffect, useState } from 'react';
@@ -131,8 +132,12 @@ export default function Project() {
     navigate(`/`);
   };
 
-  const handleDelete = (id: string, callback?: () => void) => {
-    setCurHistoryId(id);
+  const handleDelete = (
+    historyId: string,
+    _task?: HistoryTask,
+    callback?: () => void
+  ) => {
+    setCurHistoryId(historyId);
     setDeleteModalOpen(true);
     if (callback) setDeleteCallback(callback);
   };
@@ -296,7 +301,9 @@ export default function Project() {
             onOngoingTaskResume={(taskId) =>
               handleTakeControl('resume', taskId)
             }
-            onOngoingTaskDelete={(taskId) => handleDelete(taskId)}
+            onOngoingTaskDelete={(taskId) =>
+              handleDelete(taskId, undefined, () => {})
+            }
             onProjectDelete={handleProjectDelete}
             refreshTrigger={refreshTrigger}
           />