Expose local scheduling failures in usage UI

frontend/src/features/usage/utils/__tests__/errorNotice.spec.ts

@@ -73,6 +73,43 @@ describe('request failure notice', () => {
     })
   })
 
+  it('includes scheduling failure provider and endpoint hints in metadata', () => {
+    const notice = resolveRequestFailureNotice(buildRequestDetail({
+      failure_summary: {
+        status_code: 503,
+        message: '没有可用提供商支持模型 gemma-4-31b-it 的同步请求',
+      },
+      scheduling_failure: {
+        source: 'local_execution_runtime_miss',
+        reason: 'all_candidates_skipped',
+        reason_label: '所有候选均被跳过',
+        title: '本地调度失败：所有候选均被跳过',
+        message: '没有可用提供商支持模型 gemma-4-31b-it 的同步请求',
+        status_code: 503,
+        no_upstream_attempt: true,
+        requested_model: 'gemma-4-31b-it',
+        provider_hint: {
+          id: 'provider-google-api',
+          name: 'Google API',
+        },
+        endpoint_hint: {
+          id: 'endpoint-gemini',
+          api_format: 'gemini:generate_content',
+        },
+      } as NonNullable<RequestDetail['scheduling_failure']>,
+    }))
+
+    expect(notice?.meta).toEqual([
+      'Google API',
+      'gemini:generate_content',
+      'gemma-4-31b-it',
+      '所有候选均被跳过',
+      'all_candidates_skipped',
+      'HTTP 503',
+      '未进入上游执行',
+    ])
+  })
+
   it('falls back to the failure summary for upstream failures', () => {
     const notice = resolveRequestFailureNotice(buildRequestDetail({
       failure_summary: {

frontend/src/features/usage/utils/errorNotice.ts

@@ -25,6 +25,11 @@ function uniqueMeta(values: Array<string | null | undefined>): string[] {
   return Array.from(new Set(values.map(value => value?.trim()).filter((value): value is string => Boolean(value))))
 }
 
+function isUnknownProviderHint(value: string | null): boolean {
+  const normalized = value?.trim().toLowerCase()
+  return !normalized || ['unknown', 'unknow', 'pending'].includes(normalized)
+}
+
 function schedulingFailureMessage(
   failure: RequestSchedulingFailure,
   fallbackDomain: RequestErrorDomain | null,
@@ -37,6 +42,21 @@ function schedulingFailureMessage(
     ?? nonEmptyString(failure.reason)
 }
 
+function schedulingFailureProviderHint(failure: RequestSchedulingFailure): string | null {
+  const name = nonEmptyString(failure.provider_hint?.name)
+  if (name && !isUnknownProviderHint(name)) return name
+
+  const id = nonEmptyString(failure.provider_hint?.id)
+  if (id && !isUnknownProviderHint(id)) return id
+
+  return null
+}
+
+function schedulingFailureEndpointHint(failure: RequestSchedulingFailure): string | null {
+  return nonEmptyString(failure.endpoint_hint?.api_format)
+    ?? nonEmptyString(failure.endpoint_hint?.id)
+}
+
 export function resolveRequestFailureNotice(detail: RequestDetail | null | undefined): RequestFailureNotice | null {
   if (!detail) return null
 
@@ -55,6 +75,9 @@ export function resolveRequestFailureNotice(detail: RequestDetail | null | undef
         message,
         isSchedulingFailure: true,
         meta: uniqueMeta([
+          schedulingFailureProviderHint(schedulingFailure),
+          schedulingFailureEndpointHint(schedulingFailure),
+          nonEmptyString(schedulingFailure.requested_model),
           nonEmptyString(schedulingFailure.reason_summary),
           nonEmptyString(schedulingFailure.reason_label),
           nonEmptyString(schedulingFailure.reason),