fix(observability): preserve admin upstream error diagnostics

frontend/src/features/usage/components/HorizontalRequestTimeline.vue

@@ -477,6 +477,18 @@
                       HTTP {{ currentAttemptRequestError.statusCode }}
                     </span>
                   </div>
+                  <div
+                    v-if="currentAttemptRequestError.upstreamStatusCode != null && currentAttemptRequestError.upstreamStatusCode !== currentAttemptRequestError.statusCode"
+                    class="error-upstream-status text-xs text-muted-foreground mb-1"
+                  >
+                    上游响应状态：HTTP {{ currentAttemptRequestError.upstreamStatusCode }}（本次尝试状态见上方）
+                  </div>
+                  <div
+                    v-if="currentAttemptRequestError.finalStatusCode != null"
+                    class="error-final-status text-xs text-muted-foreground mb-1"
+                  >
+                    请求最终状态：HTTP {{ currentAttemptRequestError.finalStatusCode }}（与本次尝试状态不同）
+                  </div>
                   <div
                     v-if="currentAttemptRequestError.message"
                     class="error-msg"
@@ -1630,21 +1642,19 @@ const shouldShowAttemptMessageWithUpstreamResponse = (
   rawMessage: string,
   upstreamResponse: Record<string, unknown> | null,
 ): boolean => {
-  if (!upstreamResponse) return true
+  if (!upstreamResponse || !hasRenderableValue(upstreamResponse.body)) return true
   const normalized = rawMessage.trim()
   if (!normalized) return false
   if (isLocalSyncFinalizeDiagnostic(normalized)) return true
   if (isConversionDiagnosticMessage(normalized)) return true
-  if (isGenericExecutionRuntimeStatusMessage(normalized)) return false
-
-  const hasBody = hasRenderableValue(upstreamResponse.body)
-  const bodyState = (readStringField(upstreamResponse, 'body_state') ?? '').toLowerCase()
-  return !hasBody && bodyState === 'disabled'
+  return false
 }
 
 const currentAttemptRequestError = computed<{
   message: string
   statusCode?: number
+  upstreamStatusCode?: number
+  finalStatusCode?: number
   upstreamResponse: Record<string, unknown> | null
   diagnostic: Record<string, unknown> | null
 } | null>(() => {
@@ -1654,11 +1664,16 @@ const currentAttemptRequestError = computed<{
   const extra = extractObject(attempt.extra_data)
   const upstreamResponse = extractObject(extra?.upstream_response)
   const errorFlow = extractObject(extra?.error_flow)
-  const statusCode = readNumberField(upstreamResponse ?? {}, 'status_code')
+  const upstreamStatusCode = readNumberField(upstreamResponse ?? {}, 'status_code')
     ?? readNumberField(upstreamResponse ?? {}, 'statusCode')
+  const statusCode = attempt.status_code
+    ?? upstreamStatusCode
     ?? readNumberField(errorFlow ?? {}, 'status_code')
     ?? readNumberField(errorFlow ?? {}, 'statusCode')
-    ?? attempt.status_code
+  const finalStatusCode = !['pending', 'streaming'].includes(computedFinalStatus.value)
+    && props.overrideStatusCode != null && props.overrideStatusCode !== statusCode
+    ? props.overrideStatusCode
+    : undefined
   const flowMessage = errorFlow
     ? readStringField(errorFlow, 'message')
     : ''
@@ -1671,6 +1686,7 @@ const currentAttemptRequestError = computed<{
   const diagnosticMessage = extractVisibleDiagnosticMessage(extra)
   const rawMessage = chooseAttemptRawErrorMessage(flowMessage || '', fallbackMessage, diagnosticMessage)
   const message = formatAttemptErrorMessage(rawMessage, statusCode) || fallbackType
+    || '本次尝试失败，链路追踪未包含详细错误内容。'
   const upstreamResponseDisplay = normalizeUpstreamResponseDisplay(extra?.upstream_response)
   const visibleDiagnosticObjects = extractVisibleDiagnosticObjects(extra)
   const shouldAttachDiagnostic = Boolean(
@@ -1695,20 +1711,16 @@ const currentAttemptRequestError = computed<{
   const response = Object.keys(upstreamResponseData).length > 0
     ? upstreamResponseData
     : null
-  if (
-    !message
-    && statusCode == null
-    && !response
-    && !diagnostic
-  ) return null
   const showMessage = shouldShowAttemptMessageWithUpstreamResponse(
     rawMessage || fallbackType,
     upstreamResponseDisplay,
   )
 
   return {
-    message: showMessage ? (message || '未知错误') : '',
+    message: showMessage ? message : '',
     statusCode,
+    upstreamStatusCode,
+    finalStatusCode,
     upstreamResponse: response,
     diagnostic,
   }