refactor: 调优创建提取表单模型

将默认参数、命令构建、payload 构造逻辑抽离为 fineTuneFormModel.ts，新增 FineTuneStartPayload 类型约束启动训练接口，FineTuneCreateView 瘦身为视图层，列表微调，回归脚本适配。

frontend/src/api/modules/fineTune.ts

@@ -1,5 +1,5 @@
 import { get, post, put, del } from '../request'
-import type { FineTuneTask, TrainingProgress } from '@/types'
+import type { FineTuneStartPayload, FineTuneTask, TrainingProgress } from '@/types'
 
 /** 训练任务列表 */
 export const getFineTuneList = () => get<FineTuneTask[]>('/fine-tune')
@@ -16,7 +16,7 @@ export const createFineTune = (data: Partial<FineTuneTask>) =>
   post<{ id: string | number }>('/fine-tune', data)
 
 /** 启动训练（第二步） */
-export const startFineTune = (data: any) => post('/fine-tune/start', data)
+export const startFineTune = (data: FineTuneStartPayload) => post('/fine-tune/start', data)
 
 /** 更新训练任务 */
 export const updateFineTune = (id: string | number, data: Partial<FineTuneTask>) =>