diff --git a/backend/app/database/migrations.py b/backend/app/database/migrations.py
index 2009ab4..c41f8e0 100644
--- a/backend/app/database/migrations.py
+++ b/backend/app/database/migrations.py
@@ -120,6 +120,13 @@ MIGRATIONS: list[str] = [
         PRIMARY KEY(job_id, revision, options_hash)
     );
     """,
+    # v5: application-owned search history, shared by web and desktop clients.
+    """
+    CREATE TABLE IF NOT EXISTS search_history (
+        id INTEGER PRIMARY KEY AUTOINCREMENT,
+        query TEXT NOT NULL UNIQUE
+    );
+    """,
 ]
 
 
diff --git a/backend/app/routes.py b/backend/app/routes.py
index 3b8da63..642e97a 100644
--- a/backend/app/routes.py
+++ b/backend/app/routes.py
@@ -303,9 +303,24 @@ async def rename_note(note_id: str, request: NoteRenameRequest) -> Note:
 # Retrieval and chat
 @router.post("/search", response_model=SearchResponse, tags=["Search"])
 async def search_notes(request: SearchRequest) -> SearchResponse:
+    from app.services import search_history
+    search_history.record(request.query)
     return await engine.search(request)
 
 
+@router.get("/search/history", tags=["Search"])
+async def get_search_history() -> dict[str, list[str]]:
+    from app.services import search_history
+    return {"queries": search_history.list_queries()}
+
+
+@router.delete("/search/history", tags=["Search"])
+async def clear_search_history() -> dict[str, list[str]]:
+    from app.services import search_history
+    search_history.clear()
+    return {"queries": []}
+
+
 @router.post(
     "/chat",
     response_class=StreamingResponse,
diff --git a/backend/app/services/search_history.py b/backend/app/services/search_history.py
new file mode 100644
index 0000000..34fbb99
--- /dev/null
+++ b/backend/app/services/search_history.py
@@ -0,0 +1,23 @@
+from contextlib import closing
+
+from app.database.db import connect, transaction
+
+
+def list_queries():
+    with closing(connect()) as conn:
+        return [row['query'] for row in conn.execute('SELECT query FROM search_history ORDER BY id DESC LIMIT 10')]
+
+
+def record(query: str):
+    query = query.strip()
+    if not query:
+        return
+    with closing(connect()) as conn, transaction(conn):
+        conn.execute('DELETE FROM search_history WHERE query=?', (query,))
+        conn.execute('INSERT INTO search_history(query) VALUES (?)', (query,))
+        conn.execute('DELETE FROM search_history WHERE id NOT IN (SELECT id FROM search_history ORDER BY id DESC LIMIT 10)')
+
+
+def clear():
+    with closing(connect()) as conn, transaction(conn):
+        conn.execute('DELETE FROM search_history')
diff --git a/backend/tests/test_search_history.py b/backend/tests/test_search_history.py
new file mode 100644
index 0000000..ea68f68
--- /dev/null
+++ b/backend/tests/test_search_history.py
@@ -0,0 +1,22 @@
+from fastapi.testclient import TestClient
+
+from app.main import app
+from app.services import search_history
+
+
+def test_history_survives_new_clients_and_clear():
+    with TestClient(app) as client:
+        for query in ['first', 'second', ' first ']:
+            assert client.post('/api/search', json={'query': query, 'mode': 'fts'}).status_code == 200
+        assert client.get('/api/search/history').json() == {'queries': ['first', 'second']}
+    with TestClient(app) as client:
+        assert client.get('/api/search/history').json() == {'queries': ['first', 'second']}
+        assert client.delete('/api/search/history').json() == {'queries': []}
+    assert search_history.list_queries() == []
+
+
+def test_history_is_bounded_and_blank_queries_are_ignored():
+    for number in range(12):
+        search_history.record(str(number))
+    search_history.record(' ')
+    assert search_history.list_queries() == [str(number) for number in range(11, 1, -1)]
diff --git a/docs/contracts/后端接口契约-开发版.md b/docs/contracts/后端接口契约-开发版.md
index b2a3ed8..fc18365 100644
--- a/docs/contracts/后端接口契约-开发版.md
+++ b/docs/contracts/后端接口契约-开发版.md
@@ -32,6 +32,8 @@
 | POST | `/api/notes/{note_id}/move` | 移动笔记 |
 | POST | `/api/notes/{note_id}/rename` | 重命名笔记文件并保留 Note/Block 身份 |
 | POST | `/api/search` | FTS、Vector 或 Hybrid 检索 |
+| GET | `/api/search/history` | 读取当前应用数据库最近 10 条去重搜索记录 |
+| DELETE | `/api/search/history` | 清空当前应用数据库的搜索记录 |
 
 ### Workspace
 
diff --git a/frontend/src/features/search/SearchView.vue b/frontend/src/features/search/SearchView.vue
index 7241f61..e7ca2e5 100644
--- a/frontend/src/features/search/SearchView.vue
+++ b/frontend/src/features/search/SearchView.vue
@@ -1,5 +1,5 @@
 <script setup lang="ts">
-import { ref } from 'vue'
+import { onMounted, ref } from 'vue'
 import { useRouter } from 'vue-router'
 import type { SearchResult } from '@/contracts'
 import { useEditorStore } from '@/stores/editor'
@@ -7,6 +7,7 @@ import { useSearchStore } from '@/stores/search'
 import { useWorkspaceStore } from '@/stores/workspace'
 
 const searchStore = useSearchStore()
+onMounted(() => { void searchStore.loadHistory() })
 const workspaceStore = useWorkspaceStore()
 const editorStore = useEditorStore()
 const router = useRouter()
@@ -48,7 +49,7 @@ async function openResult(result: SearchResult) {
     <div v-if="searchStore.error" class="error-banner">{{ searchStore.error }}</div>
     <div v-if="searchStore.historyError" class="notice-banner">{{ searchStore.historyError }}</div>
     <div v-if="searchStore.recentQueries.length" class="search-history">
-      <span class="subtle">最近搜索（保存在当前浏览器）</span>
+      <span class="subtle">最近搜索（保存在应用数据中）</span>
       <button v-for="item in searchStore.recentQueries" :key="item" class="button-secondary" @click="searchStore.query = item; submitSearch()">{{ item }}</button>
       <button class="button-secondary" @click="searchStore.clearHistory">清空记录</button>
     </div>
diff --git a/frontend/src/services/searchService.ts b/frontend/src/services/searchService.ts
index 6fa70fa..89a09f9 100644
--- a/frontend/src/services/searchService.ts
+++ b/frontend/src/services/searchService.ts
@@ -1,6 +1,9 @@
 import apiClient from './apiClient'
 import type { ApiSearchResult, PageMeta, SearchRequest, SearchResult } from '@/contracts'
 
+export function getHistory() { return apiClient.get<{ queries: string[] }>('/api/search/history') }
+export function clearHistory() { return apiClient.delete<{ queries: string[] }>('/api/search/history') }
+
 export async function search(request: SearchRequest): Promise<{
   results: SearchResult[]
   total: number
diff --git a/frontend/src/stores/search.spec.ts b/frontend/src/stores/search.spec.ts
index bf0e5b9..5dce8f4 100644
--- a/frontend/src/stores/search.spec.ts
+++ b/frontend/src/stores/search.spec.ts
@@ -1,34 +1,35 @@
-// @vitest-environment happy-dom
 import { beforeEach, expect, it, vi } from 'vitest'
 import { createPinia, setActivePinia } from 'pinia'
 import { useSearchStore } from './search'
-import { search } from '@/services/searchService'
-
-vi.mock('@/services/searchService', () => ({ search: vi.fn() }))
+import * as service from '@/services/searchService'
+vi.mock('@/services/searchService', () => ({ search: vi.fn(), getHistory: vi.fn(), clearHistory: vi.fn() }))
 beforeEach(() => {
-  localStorage.clear()
   setActivePinia(createPinia())
-  vi.mocked(search).mockReset().mockResolvedValue({ results: [], total: 0, mode: 'hybrid' })
+  vi.mocked(service.getHistory).mockReset().mockResolvedValue({ queries: ['saved'] })
+  vi.mocked(service.clearHistory).mockReset().mockResolvedValue({ queries: [] })
+  vi.mocked(service.search).mockReset().mockResolvedValue({ results: [], total: 0, mode: 'hybrid' })
 })
-
-it('persists real queries across store recreation, reorders duplicates and clears history', async () => {
+it('loads application history after recreation and clears through the backend', async () => {
+  await useSearchStore().loadHistory()
+  setActivePinia(createPinia())
   const store = useSearchStore()
+  await store.loadHistory()
+  expect(store.recentQueries).toEqual(['saved'])
+  await store.clearHistory()
+  expect(service.clearHistory).toHaveBeenCalledOnce()
   expect(store.recentQueries).toEqual([])
-  await store.doSearch({ query: ' first ' })
-  await store.doSearch({ query: 'second' })
-  await store.doSearch({ query: 'first' })
-  setActivePinia(createPinia())
-  const restored = useSearchStore()
-  expect(restored.recentQueries).toEqual(['first', 'second'])
-  restored.clearHistory()
-  setActivePinia(createPinia())
-  expect(useSearchStore().recentQueries).toEqual([])
 })
-
-it('ignores corrupt storage and does not let a stale request overwrite the latest search', async () => {
-  localStorage.setItem('notes-agent.search-history.v1', '{bad')
-  let finish!: (value: Awaited<ReturnType<typeof search>>) => void
-  vi.mocked(search).mockImplementationOnce(() => new Promise(resolve => { finish = resolve }))
+it('retains history and reports a failed delete', async () => {
+  const store = useSearchStore()
+  await store.loadHistory()
+  vi.mocked(service.clearHistory).mockRejectedValue(new Error('offline'))
+  await store.clearHistory()
+  expect(store.recentQueries).toEqual(['saved'])
+  expect(store.historyError).toBeTruthy()
+})
+it('ignores stale search responses and reloads server history', async () => {
+  let finish!: (value: Awaited<ReturnType<typeof service.search>>) => void
+  vi.mocked(service.search).mockImplementationOnce(() => new Promise(resolve => { finish = resolve }))
   const store = useSearchStore()
   const first = store.doSearch({ query: 'old' })
   await store.doSearch({ query: 'new' })
@@ -36,5 +37,5 @@ it('ignores corrupt storage and does not let a stale request overwrite the lates
   await first
   expect(store.total).toBe(0)
   expect(store.query).toBe('new')
-  expect(store.recentQueries).toEqual(['new', 'old'])
+  expect(store.recentQueries).toEqual(['saved'])
 })
diff --git a/frontend/src/stores/search.ts b/frontend/src/stores/search.ts
index ee9ec85..c879a1e 100644
--- a/frontend/src/stores/search.ts
+++ b/frontend/src/stores/search.ts
@@ -10,14 +10,6 @@ const VECTOR_ERROR_CODES = new Set([
   'MODEL_NOT_FOUND', 'MODEL_CAPABILITY_MISMATCH', 'PROVIDER_UNAVAILABLE',
 ])
 
-const HISTORY_KEY = 'notes-agent.search-history.v1'
-function readHistory(): string[] {
-  try {
-    const value: unknown = JSON.parse(localStorage.getItem(HISTORY_KEY) ?? '[]')
-    return Array.isArray(value) ? [...new Set(value.filter((item): item is string => typeof item === 'string').map(item => item.trim()).filter(Boolean))].slice(0, 10) : []
-  } catch { return [] }
-}
-
 export const useSearchStore = defineStore('search', () => {
   const query = ref('')
   const mode = ref<'fts' | 'vector' | 'hybrid'>('hybrid')
@@ -25,14 +17,27 @@ export const useSearchStore = defineStore('search', () => {
   const total = ref(0)
   const isSearching = ref(false)
   const selectedIndex = ref(0)
-  const recentQueries = ref<string[]>(readHistory())
+  const recentQueries = ref<string[]>([])
   const historyError = ref('')
   let searchVersion = 0
-  function persistHistory() {
-    try { localStorage.setItem(HISTORY_KEY, JSON.stringify(recentQueries.value)); historyError.value = '' }
-    catch { historyError.value = '浏览器无法保存搜索记录，本次记录仅保留到页面关闭。' }
+  let historyVersion = 0
+  async function loadHistory() {
+    const version = ++historyVersion
+    try {
+      const response = await searchService.getHistory()
+      if (version !== historyVersion) return
+      recentQueries.value = response.queries
+      historyError.value = ''
+    } catch { if (version === historyVersion) historyError.value = '无法读取应用搜索记录，请检查后端连接。' }
+  }
+  async function clearHistory() {
+    const version = ++historyVersion
+    try {
+      await searchService.clearHistory()
+      if (version !== historyVersion) return
+      recentQueries.value = []; historyError.value = ''
+    } catch { if (version === historyVersion) historyError.value = '清空搜索记录失败，请重试。' }
   }
-  function clearHistory() { recentQueries.value = []; persistHistory() }
   const error = ref<string | null>(null)
   const vectorUnavailable = ref(false)
 
@@ -40,8 +45,6 @@ export const useSearchStore = defineStore('search', () => {
     request = { ...request, query: request.query.trim() }
     if (!request.query) return
     const version = ++searchVersion
-    recentQueries.value = [request.query, ...recentQueries.value.filter(item => item !== request.query)].slice(0, 10)
-    persistHistory()
     query.value = request.query
     mode.value = request.mode || 'hybrid'
     isSearching.value = true
@@ -78,7 +81,7 @@ export const useSearchStore = defineStore('search', () => {
         total.value = 0
       }
     } finally {
-      if (version === searchVersion) isSearching.value = false
+      if (version === searchVersion) { isSearching.value = false; await loadHistory() }
     }
 
   }
@@ -115,6 +118,7 @@ export const useSearchStore = defineStore('search', () => {
     recentQueries,
     historyError,
     clearHistory,
+    loadHistory,
     error,
     vectorUnavailable,
     doSearch,