fix(ops): initialize custom time ranges in local time

frontend/src/views/admin/ops/components/OpsDashboardHeader.vue

@@ -10,7 +10,7 @@ import { adminAPI } from '@/api'
 import { opsAPI, type OpsDashboardOverview, type OpsMetricThresholds, type OpsRealtimeTrafficSummary } from '@/api/admin/ops'
 import type { OpsRequestDetailsPreset } from './OpsRequestDetailsModal.vue'
 import { useAdminSettingsStore } from '@/stores'
-import { formatNumber } from '@/utils/format'
+import { formatDateTimeLocalInput, formatNumber } from '@/utils/format'
 import { formatMemorySizeMB } from '../utils/opsFormatters'
 
 type RealtimeWindow = '1min' | '5min' | '30min' | '1h'
@@ -178,8 +178,8 @@ function handleTimeRangeChange(val: string | number | boolean | null) {
     // 初始化为最近1小时
     const now = new Date()
     const oneHourAgo = new Date(now.getTime() - 60 * 60 * 1000)
-    customStartTimeInput.value = oneHourAgo.toISOString().slice(0, 16)
-    customEndTimeInput.value = now.toISOString().slice(0, 16)
+    customStartTimeInput.value = formatDateTimeLocalInput(oneHourAgo.getTime() / 1000)
+    customEndTimeInput.value = formatDateTimeLocalInput(now.getTime() / 1000)
     showCustomTimeRangeDialog.value = true
   } else {
     emit('update:timeRange', newValue)

frontend/src/views/admin/ops/components/__tests__/OpsDashboardHeader.timezone.spec.ts

@@ -0,0 +1,54 @@
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
+import { enableAutoUnmount, flushPromises, mount } from '@vue/test-utils'
+import OpsDashboardHeader from '../OpsDashboardHeader.vue'
+
+vi.mock('@/api', () => ({ adminAPI: { groups: { getAll: vi.fn().mockResolvedValue([]) } } }))
+vi.mock('@/api/admin/ops', () => ({ opsAPI: { getRealtimeTrafficSummary: vi.fn().mockResolvedValue({ enabled: true, summary: null }) } }))
+vi.mock('@/stores', () => ({ useAdminSettingsStore: () => ({ opsRealtimeMonitoringEnabled: true, setOpsRealtimeMonitoringEnabledLocal: vi.fn() }) }))
+vi.mock('vue-i18n', async () => ({
+  ...await vi.importActual<typeof import('vue-i18n')>('vue-i18n'),
+  useI18n: () => ({ t: (key: string) => key })
+}))
+enableAutoUnmount(afterEach)
+beforeEach(() => vi.stubEnv('TZ', 'Asia/Shanghai'))
+afterEach(() => { vi.useRealTimers(); vi.unstubAllEnvs() })
+
+async function openCustomRange(now: Date) {
+  expect(now.getTimezoneOffset()).toBe(-480)
+  vi.useFakeTimers()
+  vi.setSystemTime(now)
+  const wrapper = mount(OpsDashboardHeader, {
+    props: { platform: '', groupId: null, timeRange: '1h', queryMode: 'auto', loading: false, lastUpdated: null },
+    global: { stubs: {
+      Select: true, HelpTooltip: true, Icon: true,
+      BaseDialog: { props: ['show'], template: '<div v-if="show"><slot /></div>' }
+    } }
+  })
+  await flushPromises()
+  const selector = wrapper.findAllComponents({ name: 'Select' }).find(select =>
+    select.props('options').some((option: { value: unknown }) => option.value === 'custom')
+  )!
+  selector.vm.$emit('update:modelValue', 'custom')
+  await flushPromises()
+  return wrapper
+}
+
+describe('ops custom time range timezone', () => {
+  it.each([
+    [14, 23, '2026-10-09T13:23', '2026-10-09T14:23'],
+    [0, 15, '2026-10-08T23:15', '2026-10-09T00:15']
+  ] as const)('prefills the previous local hour at %i:%i', async (hour, minute, start, end) => {
+    const wrapper = await openCustomRange(new Date(2026, 9, 9, hour, minute))
+    const inputs = wrapper.findAll<HTMLInputElement>('input[type="datetime-local"]')
+    expect(inputs.map(input => input.element.value)).toEqual([start, end])
+  })
+
+  it('submits the previous real hour without applying the timezone offset twice', async () => {
+    const now = new Date(2026, 9, 9, 14, 23)
+    const wrapper = await openCustomRange(now)
+    await wrapper.findAll('button').find(button => button.text() === 'common.confirm')!.trigger('click')
+    expect(wrapper.emitted('update:customTimeRange')).toEqual([
+      [new Date(now.getTime() - 3600000).toISOString(), now.toISOString()]
+    ])
+  })
+})