diff --git a/src/renderer/src/ActivityPanel.test.tsx b/src/renderer/src/ActivityPanel.test.tsx
index 72e483b7..e76d5fb8 100644
--- a/src/renderer/src/ActivityPanel.test.tsx
+++ b/src/renderer/src/ActivityPanel.test.tsx
@@ -663,24 +663,6 @@ describe('ActivityPanel', () => {
     expect(screen.getByText('活动 500')).toBeInTheDocument()
   })
 
-  it('warns when the migrated legacy history may already be incomplete', () => {
-    render(
-      <ActivityPanel
-        legacyHistoryMayBeIncomplete
-        onClear={vi.fn()}
-        onOpenConversation={vi.fn()}
-        records={[makeRecord(1)]}
-        tokenUsage={makeTokenUsage()}
-      />
-    )
-
-    expect(
-      screen.getByText(
-        '旧版本曾限制本机运行记录的数量和详情长度，因此更早的记录或部分详情可能已经丢失。新记录会完整保存。'
-      )
-    ).toHaveAttribute('role', 'status')
-  })
-
   it('shows totals without double-counting cache tokens', () => {
     render(
       <ActivityPanel
diff --git a/src/renderer/src/ActivityPanel.tsx b/src/renderer/src/ActivityPanel.tsx
index a06f091f..22e1454d 100644
--- a/src/renderer/src/ActivityPanel.tsx
+++ b/src/renderer/src/ActivityPanel.tsx
@@ -35,7 +35,6 @@ type ActivityActorKind =
 const activityRenderBatchSize = 500
 
 export type ActivityPanelProps = {
-  legacyHistoryMayBeIncomplete?: boolean
   projects?: readonly AssistantProject[]
   records: readonly ActivityRecord[]
   tokenUsage: TokenUsageSummary
@@ -240,7 +239,6 @@ function groupActivityRecordsByProject(
 }
 
 export function ActivityPanel({
-  legacyHistoryMayBeIncomplete = false,
   projects = [],
   records,
   tokenUsage,
@@ -702,12 +700,6 @@ export function ActivityPanel({
         scope={{ kind: 'all-projects' }}
         title={t('header.title')}
       />
-      {legacyHistoryMayBeIncomplete && (
-        <p className="activity-panel__legacy-warning" role="status">
-          {t('records.legacyHistoryMayBeIncomplete')}
-        </p>
-      )}
-
       <PageTabs
         ariaLabel={t('tabs.ariaLabel')}
         idPrefix="activity-view"
diff --git a/src/renderer/src/App.test.tsx b/src/renderer/src/App.test.tsx
index c9622a2a..8a0fbd49 100644
--- a/src/renderer/src/App.test.tsx
+++ b/src/renderer/src/App.test.tsx
@@ -10639,7 +10639,7 @@ describe("App", () => {
     );
   });
 
-  it("migrates legacy activity and keeps its possible-loss warning visible", async () => {
+  it("migrates legacy activity", async () => {
     localStorage.setItem(
       ACTIVITY_STORAGE_KEY,
       JSON.stringify([
@@ -10673,14 +10673,6 @@ describe("App", () => {
       expect(localStorage.getItem(ACTIVITY_STORAGE_KEY)).toBeNull();
     });
 
-    fireEvent.click(screen.getByRole("button", { name: "运行记录" }));
-    expect(
-      await screen.findByText(
-        "旧版本曾限制本机运行记录的数量和详情长度，因此更早的记录或部分详情可能已经丢失。新记录会完整保存。",
-        {},
-        { timeout: 3_000 },
-      ),
-    ).toBeInTheDocument();
   });
 
   it("marks the current primary navigation page and hides decorative icons", async () => {
diff --git a/src/renderer/src/App.tsx b/src/renderer/src/App.tsx
index 53163fb4..3c446667 100644
--- a/src/renderer/src/App.tsx
+++ b/src/renderer/src/App.tsx
@@ -10600,9 +10600,6 @@ function App(): React.JSX.Element {
                       }
                     >
                       <ActivityPanel
-                        legacyHistoryMayBeIncomplete={
-                          legacyActivityHistoryMayBeIncomplete
-                        }
                         onClear={() => {
                           legacyActivityHistoryMayBeIncompleteRef.current = false;
                           setLegacyActivityHistoryMayBeIncomplete(false);
diff --git a/src/renderer/src/i18n/locales/en-US/activity.ts b/src/renderer/src/i18n/locales/en-US/activity.ts
index 5f543c6e..48aa2a26 100644
--- a/src/renderer/src/i18n/locales/en-US/activity.ts
+++ b/src/renderer/src/i18n/locales/en-US/activity.ts
@@ -115,8 +115,6 @@ export const activity = {
     unknownTime: 'Unknown time',
     interruptedOnRestart:
       'This activity had not finished when the app restarted.',
-    legacyHistoryMayBeIncomplete:
-      'Older versions limited local run history and detail length, so earlier records or parts of their details may already be missing. New records are saved in full.',
     unavailableScope:
       'The scope could not be determined when this activity was recorded.',
     conversation: 'Conversation: {{title}}',
diff --git a/src/renderer/src/i18n/locales/zh-CN/activity.ts b/src/renderer/src/i18n/locales/zh-CN/activity.ts
index f61a82ce..7aa9234a 100644
--- a/src/renderer/src/i18n/locales/zh-CN/activity.ts
+++ b/src/renderer/src/i18n/locales/zh-CN/activity.ts
@@ -111,8 +111,6 @@ export const activity = {
   records: {
     unknownTime: '时间未知',
     interruptedOnRestart: '应用重启时此活动尚未结束。',
-    legacyHistoryMayBeIncomplete:
-      '旧版本曾限制本机运行记录的数量和详情长度，因此更早的记录或部分详情可能已经丢失。新记录会完整保存。',
     unavailableScope:
       '创建此活动记录时未能确定其归属范围。',
     conversation: '对话：{{title}}',
diff --git a/src/renderer/src/styles.css b/src/renderer/src/styles.css
index 1cb70e7b..bb9edaca 100644
--- a/src/renderer/src/styles.css
+++ b/src/renderer/src/styles.css
@@ -13960,15 +13960,6 @@ details.settings-section > :not(summary) + :not(summary) {
   padding: var(--space-4) 0;
 }
 
-.activity-panel__legacy-warning {
-  margin: var(--space-3) 0 0;
-  padding: var(--space-3);
-  border: 1px solid color-mix(in srgb, var(--warning) 45%, transparent);
-  border-radius: var(--radius-md);
-  background: color-mix(in srgb, var(--warning) 10%, transparent);
-  color: var(--text-secondary);
-}
-
 .activity-panel__load-more {
   align-self: center;
   margin-top: var(--space-3);