fix(openai): restore ws usage window display

frontend/src/components/account/__tests__/AccountUsageCell.spec.ts

@@ -67,4 +67,59 @@ describe('AccountUsageCell', () => {
 
     expect(wrapper.text()).toContain('admin.accounts.usageWindow.gemini3Image|70|2026-03-01T09:00:00Z')
   })
+
+  it('OpenAI OAuth 在无 codex 快照时会回退显示 usage 接口窗口', async () => {
+	getUsage.mockResolvedValue({
+	  five_hour: {
+	    utilization: 0,
+	    resets_at: null,
+	    remaining_seconds: 0,
+	    window_stats: {
+	      requests: 2,
+	      tokens: 27700,
+	      cost: 0.06,
+	      standard_cost: 0.06,
+	      user_cost: 0.06
+	    }
+	  },
+	  seven_day: {
+	    utilization: 0,
+	    resets_at: null,
+	    remaining_seconds: 0,
+	    window_stats: {
+	      requests: 2,
+	      tokens: 27700,
+	      cost: 0.06,
+	      standard_cost: 0.06,
+	      user_cost: 0.06
+	    }
+	  }
+	})
+
+	const wrapper = mount(AccountUsageCell, {
+	  props: {
+	    account: {
+	      id: 2002,
+	      platform: 'openai',
+	      type: 'oauth',
+	      extra: {}
+	    } as any
+	  },
+	  global: {
+	    stubs: {
+	      UsageProgressBar: {
+	        props: ['label', 'utilization', 'resetsAt', 'windowStats', 'color'],
+	        template: '<div class="usage-bar">{{ label }}|{{ utilization }}|{{ windowStats?.tokens }}</div>'
+	      },
+	      AccountQuotaInfo: true
+	    }
+	  }
+	})
+
+	await flushPromises()
+
+	expect(getUsage).toHaveBeenCalledWith(2002)
+	expect(wrapper.text()).toContain('5h|0|27700')
+	expect(wrapper.text()).toContain('7d|0|27700')
+  })
 })