fix(model): adjust training mode value initialization

- Change initial mode value from 0 to 500 in reduce function
- Ensure proper handling of non-finite mode values
- Maintain consistent numeric type checking for mode values

src/views/model/train/index.vue

@@ -172,7 +172,7 @@ export default defineComponent({
       return list.reduce((sum: number, item: any) => {
         const modeVal = Number(item?.mode)
         return sum + (Number.isFinite(modeVal) ? modeVal : 0)
-      }, 0)
+      }, 500)
     })
 
     const activeKey = ref('1')