feat(test): 模型测试支持故障转移，展示每次尝试详情

- 后端新增 test-model-failover 接口，支持 global/direct 两种测试模式
- 利用 FailoverEngine 遍历候选并记录每次尝试的状态、延迟、错误等详情
- 前端 ModelsTab/ModelMappingTab 切换到新接口，移除格式选择下拉菜单
- 新增 TestResultDialog 组件，失败时展示候选尝试详情表格
- 简化组件 props 传递，移除不再需要的 endpoints/mappingPreview 依赖

frontend/src/api/endpoints/providers.ts

@@ -129,6 +129,48 @@ export async function testModel(data: TestModelRequest): Promise<TestModelRespon
   return response.data
 }
 
+/**
+ * 带故障转移的模型测试
+ */
+export interface TestModelFailoverRequest {
+  provider_id: string
+  mode: 'global' | 'direct'
+  model_name: string
+  api_format?: string
+  message?: string
+}
+
+export interface TestAttemptDetail {
+  candidate_index: number
+  endpoint_api_format: string
+  endpoint_base_url: string
+  key_name: string | null
+  key_id: string
+  auth_type: string
+  effective_model?: string | null
+  status: 'success' | 'failed' | 'skipped'
+  skip_reason?: string | null
+  error_message?: string | null
+  status_code?: number | null
+  latency_ms?: number | null
+}
+
+export interface TestModelFailoverResponse {
+  success: boolean
+  model: string
+  provider: { id: string; name: string }
+  attempts: TestAttemptDetail[]
+  total_candidates: number
+  total_attempts: number
+  data?: Record<string, unknown> | null
+  error?: string | null
+}
+
+export async function testModelFailover(data: TestModelFailoverRequest): Promise<TestModelFailoverResponse> {
+  const response = await client.post('/api/admin/provider-query/test-model-failover', data)
+  return response.data
+}
+
 /**
  * 映射预览相关类型
  */

frontend/src/features/providers/components/ProviderDetailDrawer.vue

@@ -891,9 +891,7 @@
                 v-if="provider"
                 :key="`models-${provider.id}`"
                 :provider="provider"
-                :endpoints="endpoints"
                 :models="providerModels"
-                :mapping-preview="providerMappingPreview"
                 @edit-model="handleEditModel"
                 @batch-assign="handleBatchAssign"
                 @refresh="loadEndpoints"
@@ -908,7 +906,6 @@
                 :provider-keys="providerKeys"
                 :models="providerModels"
                 :mapping-preview="providerMappingPreview"
-                :endpoints="endpoints"
                 @refresh="handleModelMappingChanged"
               />
             </div>

frontend/src/features/providers/components/provider-tabs/ModelMappingTab.vue

@@ -151,47 +151,14 @@
               <span class="font-mono text-sm truncate">
                 {{ mapping.name }}
               </span>
-              <!-- 测试按钮（支持多格式选择） -->
-              <DropdownMenu
-                v-if="getItemAvailableFormats(item).length > 1"
-                v-model:open="formatMenuOpen[`${item.key}-${mapping.name}`]"
-              >
-                <DropdownMenuTrigger as-child>
-                  <Button
-                    variant="ghost"
-                    size="icon"
-                    class="h-7 w-7 shrink-0"
-                    title="测试映射"
-                    :disabled="testingMapping === `${item.key}-${mapping.name}`"
-                  >
-                    <Loader2
-                      v-if="testingMapping === `${item.key}-${mapping.name}`"
-                      class="w-3 h-3 animate-spin"
-                    />
-                    <Play
-                      v-else
-                      class="w-3 h-3"
-                    />
-                  </Button>
-                </DropdownMenuTrigger>
-                <DropdownMenuContent align="end">
-                  <DropdownMenuItem
-                    v-for="fmt in getItemAvailableFormats(item)"
-                    :key="fmt"
-                    @select="testMapping(item, mapping, fmt)"
-                  >
-                    {{ fmt }}
-                  </DropdownMenuItem>
-                </DropdownMenuContent>
-              </DropdownMenu>
+              <!-- 测试按钮（直连测试） -->
               <Button
-                v-else
                 variant="ghost"
                 size="icon"
                 class="h-7 w-7 shrink-0"
                 title="测试映射"
-                :disabled="testingMapping === `${item.key}-${mapping.name}` || getItemAvailableFormats(item).length === 0"
-                @click="testMapping(item, mapping, getItemAvailableFormats(item)[0])"
+                :disabled="testingMapping === `${item.key}-${mapping.name}`"
+                @click="testMapping(item, mapping)"
               >
                 <Loader2
                   v-if="testingMapping === `${item.key}-${mapping.name}`"
@@ -340,6 +307,13 @@
     @confirm="confirmDelete"
     @cancel="deleteConfirmOpen = false"
   />
+
+  <!-- 测试结果对话框（仅失败时显示） -->
+  <TestResultDialog
+    :result="testResult"
+    mode="direct"
+    @close="testResult = null"
+  />
 </template>
 
 <script setup lang="ts">
@@ -348,21 +322,21 @@ import { useSmartPagination } from '@/composables/useSmartPagination'
 import { Tag, Plus, Edit, Trash2, ChevronRight, Loader2, Play } from 'lucide-vue-next'
 import {
   Card, Button, Badge,
-  DropdownMenu, DropdownMenuTrigger, DropdownMenuContent, DropdownMenuItem
 } from '@/components/ui'
 import AlertDialog from '@/components/common/AlertDialog.vue'
 import ModelMappingDialog, { type AliasGroup } from '../ModelMappingDialog.vue'
+import TestResultDialog from './TestResultDialog.vue'
 import { useToast } from '@/composables/useToast'
 import {
-  testModel,
+  testModelFailover,
   type Model,
   type ProviderModelAlias,
-  type ProviderMappingPreviewResponse
+  type ProviderMappingPreviewResponse,
+  type TestModelFailoverResponse
 } from '@/api/endpoints'
 import { type EndpointAPIKey } from '@/api/endpoints/keys'
-import type { ProviderEndpoint } from '@/api/endpoints/types'
 import { updateModel } from '@/api/endpoints/models'
-import { parseApiError, parseTestModelError } from '@/utils/errorParser'
+import { parseApiError } from '@/utils/errorParser'
 import type { ProviderWithEndpointsSummary } from '@/api/endpoints'
 
 interface MappingItem {
@@ -394,7 +368,6 @@ const props = defineProps<{
   providerKeys?: EndpointAPIKey[]
   models?: Model[]
   mappingPreview?: ProviderMappingPreviewResponse | null
-  endpoints?: ProviderEndpoint[]
 }>()
 
 const emit = defineEmits<{
@@ -410,15 +383,12 @@ const deleteConfirmOpen = ref(false)
 const editingGroup = ref<AliasGroup | null>(null)
 const deletingGroup = ref<AliasGroup | null>(null)
 const testingMapping = ref<string | null>(null)
+const testResult = ref<TestModelFailoverResponse | null>(null)
 const preselectedModelId = ref<string | null>(null)
 
-// 测试下拉菜单状态
-const formatMenuOpen = ref<Record<string, boolean>>({})
-
 // 使用 props 传入的数据
 const models = computed(() => props.models ?? [])
 const aliasMappingPreview = computed(() => props.mappingPreview ?? null)
-const providerEndpoints = computed(() => props.endpoints ?? [])
 const providerKeysState = computed(() => props.providerKeys ?? [])
 
 // 是否有 key 配置了自动获取上游模型
@@ -647,74 +617,24 @@ async function onDialogSaved() {
   emit('refresh')
 }
 
-// 获取可用的 API 格式（所有端点，去重；测试只关注 Key 是否支持，不依赖端点启用状态）
-const availableApiFormats = computed(() => {
-  const formats = new Set(
-    providerEndpoints.value
-      .map(ep => ep.api_format)
-  )
-  return [...formats]
-})
-
-// 获取映射项支持的 API 格式
-// 逻辑：找到支持该映射格式的所有活跃 Key，获取这些 Key 支持的所有格式，与端点格式取交集
-function getItemAvailableFormats(item: CombinedMapping): string[] {
-  // 精确映射：基于 group.apiFormats 筛选
-  if (item.type === 'exact' && item.group?.apiFormats && item.group.apiFormats.length > 0) {
-    const mappingFormats = item.group.apiFormats
-
-    // 找到所有支持该映射格式的活跃 Key
-    const supportingKeys = providerKeysState.value.filter(key => {
-      if (!key.is_active) return false
-      // Key 的 api_formats 与映射的 apiFormats 有交集
-      return key.api_formats?.some(fmt => mappingFormats.includes(fmt))
-    })
-
-    if (supportingKeys.length === 0) {
-      return []
-    }
-
-    // 收集这些 Key 支持的所有格式
-    const keyFormats = new Set<string>()
-    for (const key of supportingKeys) {
-      for (const fmt of key.api_formats || []) {
-        keyFormats.add(fmt)
-      }
-    }
-
-    // 与端点格式取交集
-    return availableApiFormats.value.filter(fmt => keyFormats.has(fmt))
-  }
-
-  // 正则映射或无限制：返回所有有活跃 Key 支持的端点格式
-  const allKeyFormats = new Set<string>()
-  for (const key of providerKeysState.value) {
-    if (!key.is_active) continue
-    for (const fmt of key.api_formats || []) {
-      allKeyFormats.add(fmt)
-    }
-  }
-  return availableApiFormats.value.filter(fmt => allKeyFormats.has(fmt))
-}
-
-// 测试精确映射（直接发请求或显示下拉菜单选择格式）
-async function testMapping(item: CombinedMapping, mapping: MappingItem, apiFormat?: string) {
-  const testingKey = `${item.key}-${mapping.name}`
+// 测试映射（直连测试，带故障转移）
+async function runMappingTest(testingKey: string, modelName: string) {
   testingMapping.value = testingKey
-  formatMenuOpen.value[testingKey] = false
 
   try {
-    const result = await testModel({
+    const result = await testModelFailover({
       provider_id: props.provider.id,
-      model_name: mapping.name,
+      mode: 'direct',
+      model_name: modelName,
       message: "hello",
-      api_format: apiFormat
     })
 
     if (result.success) {
-      showSuccess(`映射 "${mapping.name}" 测试成功`)
+      const successAttempt = result.attempts.find(a => a.status === 'success')
+      const latency = successAttempt?.latency_ms != null ? ` (${successAttempt.latency_ms}ms)` : ''
+      showSuccess(`映射 "${modelName}" 测试成功${latency}`)
     } else {
-      showError(`映射测试失败: ${parseTestModelError(result)}`)
+      testResult.value = result
     }
   } catch (err: unknown) {
     showError(`映射测试失败: ${parseApiError(err, '测试请求失败')}`)
@@ -723,29 +643,14 @@ async function testMapping(item: CombinedMapping, mapping: MappingItem, apiForma
   }
 }
 
-// 测试正则映射（指定 Key，直接发请求，因为已经有 Key 信息）
-async function testRegexMapping(item: CombinedMapping, keyItem: MatchedKeyInfo, match: MappingItem) {
-  const testingKey = `${item.key}-${keyItem.keyId}-${match.name}`
-  testingMapping.value = testingKey
+// 测试精确映射
+function testMapping(item: CombinedMapping, mapping: MappingItem) {
+  runMappingTest(`${item.key}-${mapping.name}`, mapping.name)
+}
 
-  try {
-    const result = await testModel({
-      provider_id: props.provider.id,
-      model_name: match.name,
-      message: "hello",
-      api_key_id: keyItem.keyId
-    })
-
-    if (result.success) {
-      showSuccess(`映射 "${match.name}" 测试成功`)
-    } else {
-      showError(`映射测试失败: ${parseTestModelError(result)}`)
-    }
-  } catch (err: unknown) {
-    showError(`映射测试失败: ${parseApiError(err, '测试请求失败')}`)
-  } finally {
-    testingMapping.value = null
-  }
+// 测试正则映射
+function testRegexMapping(item: CombinedMapping, keyItem: MatchedKeyInfo, match: MappingItem) {
+  runMappingTest(`${item.key}-${keyItem.keyId}-${match.name}`, match.name)
 }
 
 // 暴露给父组件

frontend/src/features/providers/components/provider-tabs/ModelsTab.vue

@@ -124,47 +124,14 @@
             </td>
             <td class="align-top px-4 py-3">
               <div class="flex justify-end gap-1">
-                <!-- 测试按钮（支持多格式选择） -->
-                <DropdownMenu
-                  v-if="availableApiFormats.length > 1"
-                  v-model:open="formatMenuOpen[model.id]"
-                >
-                  <DropdownMenuTrigger as-child>
-                    <Button
-                      variant="ghost"
-                      size="icon"
-                      class="h-8 w-8"
-                      title="测试模型"
-                      :disabled="testingModelId === model.id"
-                    >
-                      <Loader2
-                        v-if="testingModelId === model.id"
-                        class="w-3.5 h-3.5 animate-spin"
-                      />
-                      <Play
-                        v-else
-                        class="w-3.5 h-3.5"
-                      />
-                    </Button>
-                  </DropdownMenuTrigger>
-                  <DropdownMenuContent align="start">
-                    <DropdownMenuItem
-                      v-for="fmt in availableApiFormats"
-                      :key="fmt"
-                      @select="testModelConnection(model, fmt)"
-                    >
-                      {{ fmt }}
-                    </DropdownMenuItem>
-                  </DropdownMenuContent>
-                </DropdownMenu>
+                <!-- 测试按钮（模拟外部请求） -->
                 <Button
-                  v-else
                   variant="ghost"
                   size="icon"
                   class="h-8 w-8"
                   title="测试模型"
                   :disabled="testingModelId === model.id"
-                  @click="testModelConnection(model, availableApiFormats[0])"
+                  @click="testModelConnection(model)"
                 >
                   <Loader2
                     v-if="testingModelId === model.id"
@@ -243,6 +210,13 @@
       </p>
     </div>
   </Card>
+
+  <!-- 测试结果对话框 -->
+  <TestResultDialog
+    :result="testResult"
+    :mode="testResultMode"
+    @close="testResult = null"
+  />
 </template>
 
 <script setup lang="ts">
@@ -251,36 +225,22 @@ import { useSmartPagination } from '@/composables/useSmartPagination'
 import { Box, Edit, Layers, Power, Copy, Loader2, Play } from 'lucide-vue-next'
 import Card from '@/components/ui/card.vue'
 import Button from '@/components/ui/button.vue'
-import {
-  DropdownMenu,
-  DropdownMenuTrigger,
-  DropdownMenuContent,
-  DropdownMenuItem
-} from '@/components/ui'
 import { useToast } from '@/composables/useToast'
 import { useClipboard } from '@/composables/useClipboard'
 import { sortResolutionEntries } from '@/utils/form'
 import {
-  testModel,
+  testModelFailover,
   type Model,
-  type ProviderMappingPreviewResponse
+  type TestModelFailoverResponse,
 } from '@/api/endpoints'
 import { updateModel } from '@/api/endpoints/models'
-import { parseApiError, parseTestModelError } from '@/utils/errorParser'
+import { parseApiError } from '@/utils/errorParser'
 import type { ProviderWithEndpointsSummary } from '@/api/endpoints'
-
-interface Endpoint {
-  id: string
-  api_format: string
-  is_active: boolean
-  active_keys?: number
-}
+import TestResultDialog from './TestResultDialog.vue'
 
 const props = defineProps<{
   provider: ProviderWithEndpointsSummary
-  endpoints?: Endpoint[]
   models?: Model[]
-  mappingPreview?: ProviderMappingPreviewResponse | null
 }>()
 
 const emit = defineEmits<{
@@ -295,23 +255,12 @@ const { copyToClipboard } = useClipboard()
 // 状态
 const loading = ref(false)
 const localModels = ref<Model[]>([])
-const localMappingPreview = ref<ProviderMappingPreviewResponse | null>(null)
 const togglingModelId = ref<string | null>(null)
 const testingModelId = ref<string | null>(null)
-const formatMenuOpen = ref<Record<string, boolean>>({})
-
+const testResult = ref<TestModelFailoverResponse | null>(null)
+const testResultMode = ref<'global' | 'direct'>('global')
 // 使用 props 传入的数据，或使用本地数据
 const models = computed(() => props.models ?? localModels.value)
-const mappingPreview = computed(() => props.mappingPreview ?? localMappingPreview.value)
-
-// 获取可用的 API 格式（有活跃端点且有活跃 Key）
-const availableApiFormats = computed(() => {
-  if (!props.endpoints) return []
-  return props.endpoints
-    .filter(ep => ep.is_active && (ep.active_keys ?? 0) > 0)
-    .map(ep => ep.api_format)
-})
-
 // 按名称排序的模型列表
 const sortedModels = computed(() => {
   return [...models.value].sort((a, b) => {
@@ -472,63 +421,31 @@ async function toggleModelActive(model: Model) {
   }
 }
 
-// 查找模型的正则映射信息（返回第一个匹配的活跃 key 和映射名称）
-function findRegexMapping(model: Model): { keyId: string; mappedName: string } | null {
-  if (!mappingPreview.value) return null
-
-  // 在映射预览中查找该模型的全局模型 ID
-  const globalModelId = model.global_model_id
-  if (!globalModelId) return null
-
-  for (const keyInfo of mappingPreview.value.keys) {
-    // 跳过未激活的 key
-    if (!keyInfo.is_active) continue
-
-    for (const gm of keyInfo.matching_global_models) {
-      if (gm.global_model_id === globalModelId && gm.matched_models.length > 0) {
-        // 返回第一个匹配的映射名称
-        return {
-          keyId: keyInfo.key_id,
-          mappedName: gm.matched_models[0].allowed_model
-        }
-      }
-    }
-  }
-  return null
-}
-
-// 测试模型连接性
-async function testModelConnection(model: Model, apiFormat?: string) {
+// 测试模型连接性（模拟外部请求，带故障转移）
+async function testModelConnection(model: Model) {
   if (testingModelId.value) return
 
   testingModelId.value = model.id
-  formatMenuOpen.value[model.id] = false
   try {
-    // 检查是否有正则映射，如果有则使用映射名称和指定 key
-    const regexMapping = findRegexMapping(model)
-    const modelName = regexMapping?.mappedName || model.provider_model_name
-    const apiKeyId = regexMapping?.keyId
+    const modelName = model.global_model_name || model.provider_model_name
 
-    const result = await testModel({
+    const result = await testModelFailover({
       provider_id: props.provider.id,
+      mode: 'global',
       model_name: modelName,
       message: "hello",
-      api_format: apiFormat,
-      api_key_id: apiKeyId
     })
 
     if (result.success) {
-      // 根据响应内容显示不同的成功消息
-      if (result.data?.response?.choices?.[0]?.message?.content) {
-        const content = result.data.response.choices[0].message.content
-        showSuccess(`测试成功，响应: ${content.substring(0, 100)}${content.length > 100 ? '...' : ''}`)
-      } else if (result.data?.content_preview) {
-        showSuccess(`流式测试成功，预览: ${result.data.content_preview}`)
-      } else {
-        showSuccess(`模型 "${modelName}" 测试成功`)
-      }
+      const successAttempt = result.attempts.find(a => a.status === 'success')
+      const latency = successAttempt?.latency_ms != null ? ` (${successAttempt.latency_ms}ms)` : ''
+      const mapped = successAttempt?.effective_model && successAttempt.effective_model !== modelName
+        ? ` -> ${successAttempt.effective_model}`
+        : ''
+      showSuccess(`${modelName}${mapped} 测试成功${latency}`)
     } else {
-      showError(`模型测试失败: ${parseTestModelError(result)}`)
+      testResultMode.value = 'global'
+      testResult.value = result
     }
   } catch (err: unknown) {
     showError(`模型测试失败: ${parseApiError(err, '测试请求失败')}`)

frontend/src/features/providers/components/provider-tabs/TestResultDialog.vue

@@ -0,0 +1,221 @@
+<template>
+  <Dialog
+    :open="!!result"
+    size="2xl"
+    title="模型测试结果"
+    @update:open="(val: boolean) => { if (!val) $emit('close') }"
+  >
+    <div
+      v-if="result"
+      class="space-y-4"
+    >
+      <!-- 总体状态 -->
+      <div class="flex items-center justify-between">
+        <div class="flex items-center gap-2">
+          <Badge :variant="result.success ? 'success' : 'destructive'">
+            {{ result.success ? '成功' : '失败' }}
+          </Badge>
+          <span class="text-sm text-muted-foreground">
+            {{ modeLabel }}
+          </span>
+        </div>
+        <div class="text-xs text-muted-foreground">
+          候选 {{ result.total_candidates }} / 尝试 {{ result.total_attempts }}
+        </div>
+      </div>
+
+      <!-- 模型信息 -->
+      <div class="text-sm space-y-1">
+        <div>
+          <span class="text-muted-foreground">请求模型: </span>
+          <span class="font-medium">{{ result.model }}</span>
+        </div>
+        <div v-if="successEffectiveModel">
+          <span class="text-muted-foreground">发送模型: </span>
+          <span class="font-medium text-primary">{{ successEffectiveModel }}</span>
+          <span
+            v-if="successEffectiveModel !== result.model"
+            class="text-xs text-muted-foreground ml-1"
+          >(已映射)</span>
+        </div>
+      </div>
+
+      <!-- 错误信息 -->
+      <div
+        v-if="result.error && !result.success"
+        class="rounded-md bg-destructive/10 border border-destructive/20 px-3 py-2 text-xs text-destructive"
+      >
+        {{ result.error }}
+      </div>
+
+      <!-- Attempt 详情表 -->
+      <div
+        v-if="result.attempts.length > 0"
+        class="border rounded-md overflow-hidden"
+      >
+        <table class="w-full text-xs">
+          <thead>
+            <tr class="border-b bg-muted/30">
+              <th class="px-3 py-2 text-left font-medium">
+                #
+              </th>
+              <th class="px-3 py-2 text-left font-medium">
+                Key
+              </th>
+              <th class="px-3 py-2 text-left font-medium">
+                格式
+              </th>
+              <th
+                v-if="hasEffectiveModel"
+                class="px-3 py-2 text-left font-medium"
+              >
+                发送模型
+              </th>
+              <th class="px-3 py-2 text-left font-medium">
+                状态
+              </th>
+              <th class="px-3 py-2 text-right font-medium">
+                延迟
+              </th>
+              <th class="px-3 py-2 text-left font-medium">
+                详情
+              </th>
+            </tr>
+          </thead>
+          <tbody>
+            <tr
+              v-for="(attempt, idx) in result.attempts"
+              :key="idx"
+              class="border-b last:border-b-0"
+              :class="attemptRowClass(attempt.status)"
+            >
+              <td class="px-3 py-2 text-muted-foreground">
+                {{ attempt.candidate_index }}
+              </td>
+              <td
+                class="px-3 py-2 max-w-[160px] truncate"
+                :title="attempt.key_name || attempt.key_id"
+              >
+                {{ attempt.key_name || (attempt.key_id.length > 8 ? attempt.key_id.slice(0, 8) + '...' : attempt.key_id) }}
+                <span class="text-muted-foreground ml-1">({{ attempt.auth_type }})</span>
+              </td>
+              <td class="px-3 py-2">
+                <code class="text-[11px] bg-muted px-1 py-0.5 rounded">
+                  {{ attempt.endpoint_api_format }}
+                </code>
+              </td>
+              <td
+                v-if="hasEffectiveModel"
+                class="px-3 py-2 max-w-[180px] truncate"
+                :title="attempt.effective_model || '-'"
+              >
+                {{ attempt.effective_model || '-' }}
+              </td>
+              <td class="px-3 py-2">
+                <Badge
+                  :variant="statusVariant(attempt.status)"
+                  class="text-[10px] px-1.5 py-0"
+                >
+                  {{ statusLabel(attempt.status) }}
+                </Badge>
+                <span
+                  v-if="attempt.status_code"
+                  class="text-muted-foreground ml-1"
+                >
+                  {{ attempt.status_code }}
+                </span>
+              </td>
+              <td class="px-3 py-2 text-right text-muted-foreground">
+                {{ attempt.latency_ms != null ? attempt.latency_ms + 'ms' : '-' }}
+              </td>
+              <td
+                class="px-3 py-2 max-w-[200px] truncate text-muted-foreground"
+                :title="attemptDetail(attempt)"
+              >
+                {{ attemptDetail(attempt) }}
+              </td>
+            </tr>
+          </tbody>
+        </table>
+      </div>
+
+      <!-- 无 attempt -->
+      <div
+        v-else
+        class="text-center text-sm text-muted-foreground py-4"
+      >
+        没有可用的候选进行测试
+      </div>
+    </div>
+
+    <template #footer>
+      <Button
+        variant="outline"
+        size="sm"
+        @click="$emit('close')"
+      >
+        关闭
+      </Button>
+    </template>
+  </Dialog>
+</template>
+
+<script setup lang="ts">
+import { computed } from 'vue'
+import { Dialog, Badge } from '@/components/ui'
+import Button from '@/components/ui/button.vue'
+import type { TestModelFailoverResponse, TestAttemptDetail } from '@/api/endpoints/providers'
+
+const props = defineProps<{
+  result: TestModelFailoverResponse | null
+  mode?: 'global' | 'direct'
+}>()
+
+defineEmits<{
+  close: []
+}>()
+
+const modeLabel = computed(() => {
+  if (props.mode === 'global') return '模拟外部请求'
+  if (props.mode === 'direct') return '直接测试'
+  return ''
+})
+
+const successEffectiveModel = computed(() => {
+  if (!props.result) return null
+  const successAttempt = props.result.attempts.find(a => a.status === 'success')
+  return successAttempt?.effective_model || null
+})
+
+const hasEffectiveModel = computed(() => {
+  if (!props.result) return false
+  return props.result.attempts.some(a => a.effective_model && a.effective_model !== props.result?.model)
+})
+
+function statusVariant(status: string) {
+  if (status === 'success') return 'success' as const
+  if (status === 'failed') return 'destructive' as const
+  return 'secondary' as const
+}
+
+function statusLabel(status: string) {
+  if (status === 'success') return '成功'
+  if (status === 'failed') return '失败'
+  if (status === 'skipped') return '跳过'
+  return status
+}
+
+function attemptRowClass(status: string) {
+  if (status === 'success') return 'bg-green-500/5'
+  if (status === 'failed') return 'bg-red-500/5'
+  if (status === 'skipped') return 'bg-muted/20'
+  return ''
+}
+
+function attemptDetail(attempt: TestAttemptDetail): string {
+  if (attempt.skip_reason) return attempt.skip_reason
+  if (attempt.error_message) return attempt.error_message
+  if (attempt.status === 'success') return attempt.endpoint_base_url
+  return '-'
+}
+</script>

frontend/src/views/public/guide/components/MarkdownViewer.vue

@@ -1,9 +1,11 @@
 <template>
   <div class="markdown-viewer-container">
+    <!-- eslint-disable vue/no-v-html -->
     <div
       class="markdown-body"
       v-html="renderedHtml"
     />
+    <!-- eslint-enable vue/no-v-html -->
   </div>
 </template>
 

src/api/admin/provider_query.py

@@ -7,7 +7,8 @@ from __future__ import annotations
 
 import asyncio
 import json
-from typing import Any
+import time
+from typing import TYPE_CHECKING, Any
 
 from fastapi import APIRouter, Depends, HTTPException
 from pydantic import BaseModel
@@ -39,6 +40,9 @@ from src.services.provider.oauth_token import resolve_oauth_access_token
 from src.services.proxy_node.resolver import resolve_effective_proxy
 from src.utils.auth_utils import get_current_user
 
+if TYPE_CHECKING:
+    from src.services.scheduling.schemas import ProviderCandidate
+
 router = APIRouter(prefix="/api/admin/provider-query", tags=["Provider Query"])
 
 
@@ -194,6 +198,46 @@ class TestModelRequest(BaseModel):
     api_format: str | None = None  # 指定使用的API格式，如果不指定则使用端点的默认格式
 
 
+class TestModelFailoverRequest(BaseModel):
+    """带故障转移的模型测试请求"""
+
+    provider_id: str
+    mode: str  # "global" = 模拟外部请求(用全局模型名), "direct" = 直接测试(用provider_model_name)
+    model_name: str  # global 模式传 global_model_name, direct 模式传 provider_model_name
+    api_format: str | None = None  # 指定 API 格式（endpoint signature）
+    message: str | None = "Hello"
+
+
+class TestAttemptDetail(BaseModel):
+    """单次测试尝试的详情"""
+
+    candidate_index: int
+    endpoint_api_format: str
+    endpoint_base_url: str
+    key_name: str | None = None
+    key_id: str
+    auth_type: str
+    effective_model: str | None = None  # 实际发送的模型名（映射后）
+    status: str  # "success" | "failed" | "skipped"
+    skip_reason: str | None = None
+    error_message: str | None = None
+    status_code: int | None = None
+    latency_ms: int | None = None
+
+
+class TestModelFailoverResponse(BaseModel):
+    """带故障转移的模型测试响应"""
+
+    success: bool
+    model: str
+    provider: dict[str, str]
+    attempts: list[TestAttemptDetail]
+    total_candidates: int
+    total_attempts: int
+    data: dict | None = None
+    error: str | None = None
+
+
 # ============ API Endpoints ============
 
 
@@ -1011,3 +1055,419 @@ async def test_model(
                 else None
             ),
         }
+
+
+# ---------------------------------------------------------------------------
+# 带故障转移的模型测试
+# ---------------------------------------------------------------------------
+
+
+def _build_direct_test_candidates(
+    provider: Provider,
+    api_format: str | None = None,
+) -> list[ProviderCandidate]:
+    """
+    为直接测试模式构建候选列表。
+
+    遍历 Provider 的活跃 Endpoint 和 Key，不经过 GlobalModel 解析。
+    """
+    from src.services.scheduling.schemas import ProviderCandidate
+
+    candidates: list[ProviderCandidate] = []
+    for endpoint in provider.endpoints or []:
+        if not getattr(endpoint, "is_active", False):
+            continue
+        ep_format = str(getattr(endpoint, "api_format", "") or "")
+        if not ep_format:
+            continue
+        if api_format and ep_format != api_format:
+            continue
+
+        for key in provider.api_keys or []:
+            if not getattr(key, "is_active", False):
+                continue
+            key_formats = getattr(key, "api_formats", None)
+            if key_formats is not None and ep_format not in key_formats:
+                continue
+
+            candidates.append(
+                ProviderCandidate(
+                    provider=provider,
+                    endpoint=endpoint,
+                    key=key,
+                    is_skipped=False,
+                    provider_api_format=ep_format,
+                )
+            )
+    return candidates
+
+
+@router.post("/test-model-failover")
+async def test_model_failover(
+    request: TestModelFailoverRequest,
+    db: Session = Depends(get_db),
+    current_user: User = Depends(get_current_user),
+) -> Any:
+    """
+    带故障转移的模型测试
+
+    支持两种模式:
+    - global: 模拟外部请求，用全局模型名走候选解析（限定当前 Provider）
+    - direct: 直接测试 provider_model_name，在当前 Provider 内多 Key 故障转移
+    """
+    from src.services.candidate.failover import FailoverEngine
+    from src.services.candidate.policy import RetryMode, RetryPolicy, SkipPolicy
+    from src.services.task.protocol import AttemptKind, AttemptResult
+
+    # 1. 加载 Provider
+    provider = (
+        db.query(Provider)
+        .options(
+            joinedload(Provider.endpoints),
+            joinedload(Provider.api_keys),
+            joinedload(Provider.models),
+        )
+        .filter(Provider.id == request.provider_id)
+        .first()
+    )
+    if not provider:
+        raise HTTPException(status_code=404, detail="Provider not found")
+
+    if request.mode not in ("global", "direct"):
+        raise HTTPException(status_code=400, detail="mode must be 'global' or 'direct'")
+
+    # 2. 构建候选列表
+    candidates = []
+    gm_obj = None  # GlobalModel 对象，global 模式下用于 fallback 映射
+
+    if request.mode == "global":
+        # 模拟外部请求：走 CandidateBuilder 候选解析
+        from src.services.scheduling.candidate_builder import CandidateBuilder
+        from src.services.scheduling.candidate_sorter import CandidateSorter
+        from src.services.scheduling.scheduling_config import SchedulingConfig
+
+        sorter = CandidateSorter(SchedulingConfig())
+        builder = CandidateBuilder(sorter)
+
+        # 确定 client_format
+        client_format = request.api_format
+        if not client_format:
+            # 取第一个活跃端点的格式
+            for ep in provider.endpoints or []:
+                if getattr(ep, "is_active", False):
+                    client_format = str(getattr(ep, "api_format", "") or "")
+                    if client_format:
+                        break
+        if not client_format:
+            raise HTTPException(
+                status_code=400, detail="No active endpoint found to determine API format"
+            )
+
+        # 从 GlobalModel 提取 model_mappings（正则映射规则，用于 Key.allowed_models 匹配）
+        from src.services.cache.model_cache import ModelCacheService
+
+        model_mappings: list[str] = []
+        gm_obj = None
+        try:
+            gm_obj = await ModelCacheService.get_global_model_by_name(db, request.model_name)
+            if gm_obj and isinstance(gm_obj.config, dict):
+                raw_mappings = gm_obj.config.get("model_mappings", [])
+                if isinstance(raw_mappings, list):
+                    model_mappings = raw_mappings
+        except Exception as e:
+            logger.warning("[test-model-failover] Failed to get GlobalModel mappings: {}", e)
+
+        try:
+            candidates = await builder._build_candidates(
+                db=db,
+                providers=[provider],
+                client_format=client_format,
+                model_name=request.model_name,
+                model_mappings=model_mappings if model_mappings else None,
+                affinity_key=None,
+                is_stream=False,
+            )
+        except Exception as e:
+            logger.warning("[test-model-failover] CandidateBuilder failed: {}", e)
+            candidates = []
+    else:
+        # 直接测试：简单匹配 Endpoint + Key
+        candidates = _build_direct_test_candidates(
+            provider=provider,
+            api_format=request.api_format,
+        )
+
+    if not candidates:
+        return TestModelFailoverResponse(
+            success=False,
+            model=request.model_name,
+            provider={"id": str(provider.id), "name": provider.name},
+            attempts=[],
+            total_candidates=0,
+            total_attempts=0,
+            error="No available candidates found for this model",
+        ).model_dump()
+
+    # 3. 定义 attempt_func
+    attempts: list[TestAttemptDetail] = []
+    p_type = str(getattr(provider, "provider_type", "") or "").lower()
+
+    async def _attempt_func(candidate: Any) -> AttemptResult:
+        start_time = time.monotonic()
+        endpoint = candidate.endpoint
+        key = candidate.key
+        candidate_idx = getattr(candidate, "_utf_candidate_index", 0)
+
+        auth_type = str(getattr(key, "auth_type", "api_key") or "api_key").lower()
+        extra_headers: dict[str, str] = {}
+        oauth_meta: dict = {}
+        effective_model = request.model_name
+        attempt_recorded = False
+
+        try:
+            # 解析 Key（复用统一的认证解析逻辑）
+            effective_proxy = resolve_effective_proxy(
+                getattr(provider, "proxy", None), getattr(key, "proxy", None)
+            )
+            try:
+                api_key_value, auth_config = await _resolve_key_auth(
+                    key, provider, provider_proxy_config=effective_proxy
+                )
+            except _KeyAuthError as e:
+                raise Exception(e.message) from e
+            oauth_meta = auth_config or {}
+
+            # OAuth 额外头
+            if auth_type == "oauth":
+                account_id = oauth_meta.get("account_id")
+                if account_id:
+                    extra_headers["chatgpt-account-id"] = str(account_id)
+
+            ep_extra = get_extra_headers_from_endpoint(endpoint) or {}
+            extra_headers.update(ep_extra)
+
+            # 确定实际模型名
+            effective_model = request.model_name
+            if request.mode == "global":
+                if candidate.mapping_matched_model:
+                    effective_model = candidate.mapping_matched_model
+                elif gm_obj:
+                    # Fallback: 从 Provider.Model.provider_model_mappings 获取映射
+                    # 与正常请求流程中 _get_mapped_model() 的逻辑一致
+                    gm_id_str = str(gm_obj.id)
+                    for m in provider.models or []:
+                        if not getattr(m, "is_active", False):
+                            continue
+                        if str(getattr(m, "global_model_id", "")) != gm_id_str:
+                            continue
+                        ep_format = str(getattr(endpoint, "api_format", "") or "")
+                        effective_model = m.select_provider_model_name(
+                            affinity_key=None, api_format=ep_format
+                        )
+                        logger.info(
+                            "[test-failover] Fallback mapping: {} -> {} "
+                            "(provider_model_name={}, has_provider_model_mappings={})",
+                            request.model_name,
+                            effective_model,
+                            m.provider_model_name,
+                            bool(m.provider_model_mappings),
+                        )
+                        break
+                    else:
+                        logger.info(
+                            "[test-failover] No matching Model found for gm_id={} in provider={}",
+                            gm_id_str,
+                            provider.name,
+                        )
+
+            # 获取 adapter
+            adapter_class = get_adapter_for_format(endpoint.api_format)
+            if not adapter_class:
+                raise Exception(f"Unknown API format: {endpoint.api_format}")
+
+            # 构建测试请求
+            check_request = {
+                "model": effective_model,
+                "messages": [{"role": "user", "content": request.message or "Hello"}],
+                "max_tokens": 30,
+                "temperature": 0.7,
+                "stream": True,
+            }
+
+            body_rules = getattr(endpoint, "body_rules", None)
+            header_rules = getattr(endpoint, "header_rules", None)
+
+            # 执行检查
+            response = await adapter_class.check_endpoint(
+                None,
+                endpoint.base_url,
+                api_key_value,
+                check_request,
+                extra_headers if extra_headers else None,
+                body_rules=body_rules,
+                header_rules=header_rules,
+                db=db,
+                user=current_user,
+                provider_name=provider.name,
+                provider_id=str(provider.id),
+                api_key_id=str(key.id),
+                model_name=effective_model,
+                auth_type=auth_type,
+                provider_type=p_type if p_type else None,
+                decrypted_auth_config=oauth_meta if oauth_meta else None,
+                proxy_config=effective_proxy,
+            )
+
+            latency_ms = int((time.monotonic() - start_time) * 1000)
+            status_code = response.get("status_code", 0)
+
+            # 检查响应是否有错误
+            has_error = bool(response.get("error")) or status_code != 200
+            if not has_error:
+                resp_data = response.get("response", {})
+                resp_body = resp_data.get("response_body", {})
+                if isinstance(resp_body, str):
+                    try:
+                        parsed = json.loads(resp_body)
+                    except (json.JSONDecodeError, ValueError):
+                        parsed = resp_body
+                else:
+                    parsed = resp_body
+                if isinstance(parsed, dict) and "error" in parsed:
+                    has_error = True
+
+            if has_error:
+                error_msg = str(response.get("error", ""))[:300]
+                if not error_msg and status_code != 200:
+                    error_msg = f"HTTP {status_code}"
+                if not error_msg and isinstance(parsed, dict) and "error" in parsed:
+                    err_val = parsed["error"]
+                    error_msg = str(
+                        err_val.get("message", err_val)
+                        if isinstance(err_val, dict)
+                        else err_val
+                    )[:300]
+                attempts.append(
+                    TestAttemptDetail(
+                        candidate_index=candidate_idx,
+                        endpoint_api_format=str(endpoint.api_format),
+                        endpoint_base_url=str(endpoint.base_url)[:80],
+                        key_name=getattr(key, "name", None),
+                        key_id=str(key.id),
+                        auth_type=auth_type,
+                        effective_model=effective_model,
+                        status="failed",
+                        error_message=error_msg,
+                        status_code=status_code,
+                        latency_ms=latency_ms,
+                    )
+                )
+                attempt_recorded = True
+                raise Exception(f"Upstream error: status={status_code}, error={error_msg}")
+
+            # 成功
+            attempts.append(
+                TestAttemptDetail(
+                    candidate_index=candidate_idx,
+                    endpoint_api_format=str(endpoint.api_format),
+                    endpoint_base_url=str(endpoint.base_url)[:80],
+                    key_name=getattr(key, "name", None),
+                    key_id=str(key.id),
+                    auth_type=auth_type,
+                    effective_model=effective_model,
+                    status="success",
+                    status_code=status_code,
+                    latency_ms=latency_ms,
+                )
+            )
+
+            return AttemptResult(
+                kind=AttemptKind.SYNC_RESPONSE,
+                http_status=status_code,
+                http_headers={},
+                response_body=response.get("response", response),
+            )
+
+        except Exception as exc:
+            latency_ms = int((time.monotonic() - start_time) * 1000)
+            # has_error 路径已记录带 status_code 的详细 attempt，此处仅补录早期异常
+            if not attempt_recorded:
+                attempts.append(
+                    TestAttemptDetail(
+                        candidate_index=candidate_idx,
+                        endpoint_api_format=str(endpoint.api_format),
+                        endpoint_base_url=str(endpoint.base_url)[:80],
+                        key_name=getattr(key, "name", None),
+                        key_id=str(key.id),
+                        auth_type=auth_type,
+                        effective_model=effective_model,
+                        status="failed",
+                        error_message=str(exc)[:300],
+                        latency_ms=latency_ms,
+                    )
+                )
+            raise
+
+    # 4. 预设 candidate index（FailoverEngine 也会 setattr，此处兜底防止 setattr 失败）
+    for i, cand in enumerate(candidates):
+        cand._utf_candidate_index = i  # type: ignore[attr-defined]
+
+    # 5. 执行故障转移
+    try:
+        engine = FailoverEngine(db)
+        result = await engine.execute(
+            candidates=candidates,
+            attempt_func=_attempt_func,
+            retry_policy=RetryPolicy(mode=RetryMode.DISABLED),
+            skip_policy=SkipPolicy(),
+            request_id=None,
+        )
+
+        # 补充 skipped 候选到 attempts
+        for i, cand in enumerate(candidates):
+            if cand.is_skipped and not any(a.candidate_index == i for a in attempts):
+                attempts.append(
+                    TestAttemptDetail(
+                        candidate_index=i,
+                        endpoint_api_format=str(cand.endpoint.api_format),
+                        endpoint_base_url=str(cand.endpoint.base_url)[:80],
+                        key_name=getattr(cand.key, "name", None),
+                        key_id=str(cand.key.id),
+                        auth_type=str(getattr(cand.key, "auth_type", "") or ""),
+                        status="skipped",
+                        skip_reason=cand.skip_reason,
+                    )
+                )
+
+        attempts.sort(key=lambda a: a.candidate_index)
+
+        # 提取成功时的数据
+        data = None
+        if result.success and result.attempt_result:
+            data = {
+                "stream": True,
+                "response": result.attempt_result.response_body,
+            }
+
+        return TestModelFailoverResponse(
+            success=result.success,
+            model=request.model_name,
+            provider={"id": str(provider.id), "name": provider.name},
+            attempts=attempts,
+            total_candidates=len(candidates),
+            total_attempts=result.attempt_count,
+            data=data,
+            error=result.error_message if not result.success else None,
+        ).model_dump()
+
+    except Exception as e:
+        logger.error("[test-model-failover] Error: {}", e)
+        return TestModelFailoverResponse(
+            success=False,
+            model=request.model_name,
+            provider={"id": str(provider.id), "name": provider.name},
+            attempts=attempts,
+            total_candidates=len(candidates),
+            total_attempts=0,
+            error=str(e)[:500],
+        ).model_dump()