fix(usage): preserve failed status for active request refreshes

frontend/src/features/usage/composables/__tests__/useUsageData.spec.ts

@@ -102,6 +102,47 @@ describe('useUsageData', () => {
     expect(totalRecords.value).toBe(1)
   })
 
+  it('keeps locally resolved failure fields when a stale active record refreshes', async () => {
+    const isAdminPage = ref(true)
+    const { loadRecords, currentRecords } = useUsageData({ isAdminPage })
+    const dateRange = { preset: 'today', tz_offset_minutes: 0 }
+
+    getAllUsageRecordsMock.mockResolvedValueOnce({
+      records: [buildUsageRecord({
+        status: 'failed',
+        status_code: 524,
+        error_message: 'error code: 524',
+        response_time_ms: 125_000,
+      })],
+      total: 1,
+      limit: 20,
+      offset: 0,
+    })
+
+    await loadRecords({ page: 1, pageSize: 20 }, undefined, dateRange)
+
+    getAllUsageRecordsMock.mockResolvedValueOnce({
+      records: [buildUsageRecord({
+        status: 'pending',
+        status_code: undefined,
+        error_message: undefined,
+        response_time_ms: null,
+      })],
+      total: 1,
+      limit: 20,
+      offset: 0,
+    })
+
+    await loadRecords({ page: 1, pageSize: 20 }, undefined, dateRange)
+
+    expect(currentRecords.value[0]).toMatchObject({
+      status: 'failed',
+      status_code: 524,
+      error_message: 'error code: 524',
+      response_time_ms: 125_000,
+    })
+  })
+
   it('continues loading admin breakdowns when the summary request fails', async () => {
     const isAdminPage = ref(true)
     const {

frontend/src/features/usage/composables/useUsageData.ts

@@ -509,6 +509,9 @@ export function useUsageData(options: UseUsageDataOptions) {
           actual_cost: existing.actual_cost ?? record.actual_cost,
           response_time_ms: mergePositiveDurationMs(existing.response_time_ms, record.response_time_ms),
           first_byte_time_ms: mergePositiveDurationMs(existing.first_byte_time_ms, record.first_byte_time_ms),
+          status_code: existing.status_code ?? record.status_code,
+          error_message: existing.error_message ?? record.error_message,
+          image_progress: existing.image_progress ?? record.image_progress,
           is_stream: upstreamIsStream,
           upstream_is_stream: upstreamIsStream,
           client_requested_stream: clientRequestedStream,