feat: 评测创建支持基础指标配置与启动参数类型化

新增 StartEvalPayload 与 BasicEvalMetricsConfig 类型约束启动评测接口，创建向导补充 BLEU、ROUGE、余弦相似度等基础指标配置，维度表单与规则步骤同步调整，回归脚本扩充断言。

frontend/src/api/modules/eval.ts

@@ -1,5 +1,5 @@
 import { get, post, put, del } from '../request'
-import type { EvalTask, EvalTaskDetail, Dimension } from '@/types'
+import type { EvalTask, EvalTaskDetail, Dimension, StartEvalPayload } from '@/types'
 
 /** 评测任务列表 */
 export const getEvalList = () => get<EvalTask[]>('/model-eval')
@@ -11,7 +11,7 @@ export const getEvalDetail = (id: string | number) => get<EvalTaskDetail>(`/mode
 export const deleteEval = (id: string | number) => del(`/model-eval/${id}`)
 
 /** 启动评测 */
-export const startEval = (data: any) => post('/model-eval/start', data)
+export const startEval = (data: StartEvalPayload) => post('/model-eval/start', data)
 
 /** 评测维度列表 */
 export const getDimensionList = () => get<Dimension[]>('/dimension')