fix(notification): handle empty channel configuration

src/views/setting/AccountSettingNotification.vue

@@ -83,7 +83,7 @@ type NotificationConfigInput = Partial<NotificationConf> & {
 }
 
 interface NotificationConfigResponse {
-  value?: NotificationConfigInput[]
+  value?: NotificationConfigInput[] | null
 }
 
 type NotificationLoadState = 'idle' | 'loading' | 'ready' | 'error'
@@ -184,8 +184,9 @@ function normalizeNotification(notification: NotificationConfigInput, index: num
   }
 }
 
-function normalizeNotificationList(value: NotificationConfigInput[] = []) {
-  return value.map((notification, index) => normalizeNotification(notification, index))
+/** 将后端尚未创建的空配置与已有渠道统一为可编辑列表。 */
+function normalizeNotificationList(value?: NotificationConfigInput[] | null) {
+  return (value ?? []).map((notification, index) => normalizeNotification(notification, index))
 }
 
 function notificationNameKey(name: string) {

src/views/setting/__tests__/AccountSettingNotification.spec.ts

@@ -91,7 +91,7 @@ const templateFixture = {
   subscribeComplete: '{}',
 }
 
-function mockLoadedSettings(channels = notificationsFixture) {
+function mockLoadedSettings(channels: typeof notificationsFixture | null = notificationsFixture) {
   mocks.apiGet.mockImplementation((endpoint: string) => {
     if (endpoint === 'system/setting/Notifications') {
       return { success: true, data: { value: structuredClone(channels) } }
@@ -178,6 +178,27 @@ describe('AccountSettingNotification', () => {
     )
   })
 
+  it('treats a null notification configuration as empty and allows the first channel to be saved', async () => {
+    mockLoadedSettings(null)
+    const user = userEvent.setup()
+    await renderNotificationSettings()
+
+    await waitFor(() => expect(mocks.apiGet).toHaveBeenCalledWith('system/setting/Notifications'))
+    expect(screen.queryByText('加载通知渠道失败，请刷新后重试')).not.toBeInTheDocument()
+
+    const channelCard = getCard('通知渠道')
+    await user.click(channelCard.getAllByRole('button').at(-1)!)
+    await user.click(await screen.findByText('Telegram', { selector: '.v-list-item-title' }))
+    expect(screen.getByText('通知1 / telegram')).toBeInTheDocument()
+
+    await user.click(channelCard.getByRole('button', { name: '保存' }))
+    await waitFor(() =>
+      expect(mocks.apiPost).toHaveBeenCalledWith('notification/config', [
+        expect.objectContaining({ id: expect.any(String), name: '通知1', type: 'telegram' }),
+      ]),
+    )
+  })
+
   it('creates a unique automatic channel name, removes channels, and saves the current order once', async () => {
     const user = userEvent.setup()
     await renderNotificationSettings()