fix: 模型评测异步加载等待与多节点路由修复

- eval_runner 等待异步模型加载完成（InferenceSession.wait_until_loaded），
  修复 "model load failed: unknown"
- 评测算力节点选择：优先页面选择的节点 / 模型所在节点（_select_eval_node），
  多节点时不再派发到不可达节点导致连接超时
- 前端评测 GPU 选择改为节点感知（节点:GPU 复合值），透传 compute_node_id，
  并检查 startEval 结果展示真实错误
- 大模型评价（judge）使用模型记录的真实 API 模型名（api_model），
  避免用平台内部名调用 LLM API 导致 HTTP 400
- 新增后端节点选择与 compute wait_until_loaded 单元测试

Co-Authored-By: Claude <noreply@anthropic.com>

frontend/src/views/eval/EvalCreateView.vue

@@ -143,11 +143,15 @@ async function handleSubmit() {
   submitting.value = true
   try {
     const dimensionId = await resolveDimensionId()
-    await startEval({
+    // GPU 选择为「节点:GPU序号」复合值，解析出节点与 GPU 序号，
+    // 多算力节点时必须把节点信息传给后端，否则会派发到错误的算力节点
+    const [gpuNodeId, gpuIndex] = String(taskForm.value.gpu_id).split(':')
+    const evalResult: any = await startEval({
       eval_task_name: taskForm.value.eval_task_name,
       eval_type: 'custom',
       model_id: taskForm.value.model_id,
-      gpu_id: taskForm.value.gpu_id,
+      gpu_id: Number(gpuIndex) || 0,
+      compute_node_id: gpuNodeId || '',
       dataset_id: taskForm.value.data_source === 'dataset' ? taskForm.value.dataset_id : '',
       dimension_id: dimensionId,
       data_source: taskForm.value.data_source,
@@ -167,6 +171,10 @@ async function handleSubmit() {
         output_precision: basicMetricForm.value.output_precision,
       },
     })
+    if (evalResult?.status === 'failed' || evalResult?.error) {
+      ElMessage.error(`评测启动失败：${evalResult?.error || '请检查算力节点与模型路径'}`)
+      return
+    }
     ElMessage.success('评测任务已创建并启动')
     router.push('/model-eval')
   } catch (error) {

frontend/src/views/eval/create/EvalTaskSetupStep.vue

@@ -104,9 +104,9 @@ defineExpose({ validate })
       <el-select v-model="form.gpu_id" placeholder="请选择 GPU" style="width: 100%" :loading="loading">
         <el-option
           v-for="gpu in gpus"
-          :key="gpu.id"
-          :label="`${gpu.name} (GPU ${gpu.id})`"
-          :value="gpu.id ?? 0"
+          :key="`${gpu.node_id || ''}:${gpu.id ?? 0}`"
+          :label="`${gpu.node_name || gpu.node_code || '算力节点'} / ${gpu.name} (GPU ${gpu.id ?? 0})`"
+          :value="`${gpu.node_id || ''}:${gpu.id ?? 0}`"
         />
       </el-select>
     </el-form-item>

frontend/src/views/eval/create/StartEvalStep.vue

@@ -1,4 +1,5 @@
 <script setup lang="ts">
+import { computed } from 'vue'
 import type { DatasetItem, GpuInfo, ModelItem, TrainedModel } from '@/types'
 import type { BasicMetricSetupDraft } from './BasicMetricSetupStep.vue'
 import type { EvalRuleSetupDraft } from './EvalRuleSetupStep.vue'
@@ -17,6 +18,15 @@ const props = defineProps<{
 function nameOf<T extends { id: string | number; name?: string }>(items: T[], id: string | number) {
   return items.find((item) => item.id === id)?.name || String(id || '-')
 }
+
+/** GPU 选择为「节点:GPU序号」复合值，解析并展示为可读标签 */
+const gpuLabel = computed(() => {
+  const key = String(props.task.gpu_id || '')
+  const gpu = props.gpus.find((g) => `${g.node_id || ''}:${g.id ?? 0}` === key)
+  if (gpu) return `${gpu.node_name || gpu.node_code || '算力节点'} / GPU ${gpu.id ?? 0}`
+  const [nodeId, idx] = key.split(':')
+  return nodeId ? `节点 ${nodeId} / GPU ${idx || 0}` : `GPU ${key || 0}`
+})
 </script>
 
 <template>
@@ -24,7 +34,7 @@ function nameOf<T extends { id: string | number; name?: string }>(items: T[], id
     <el-descriptions :column="2" border>
       <el-descriptions-item label="Task">{{ props.task.eval_task_name || '-' }}</el-descriptions-item>
       <el-descriptions-item label="Model">{{ nameOf(props.trainedModels, props.task.model_id) }}</el-descriptions-item>
-      <el-descriptions-item label="GPU">GPU {{ props.task.gpu_id || 0 }}</el-descriptions-item>
+      <el-descriptions-item label="GPU">{{ gpuLabel }}</el-descriptions-item>
       <el-descriptions-item label="Dataset">
         {{ props.task.data_source === 'dataset' ? nameOf(props.evalDatasets, props.task.dataset_id) : 'Inference results' }}
       </el-descriptions-item>