refactor: simplify cost calculation to 3 fields, drop manual_cost

Co-authored-by: aider (openai/DeepSeek-V3.2-Thinking) <aider@aider.chat>

inventory-web/src/views/stock/inbound/product.vue

@@ -467,7 +467,8 @@ import {
   searchMaterialBase,
   searchBom,
   getFilterOptions,
-  getManagerHistory // [新增]
+  getManagerHistory, // [新增]
+  calculateBomCost
 } from '@/api/inbound/product'
 import { uploadFile, deleteFile } from '@/api/inbound/buy'
 import WebRtcCamera from '@/components/Camera/WebRtcCamera.vue'
@@ -657,7 +658,7 @@ const handleSearchBom = async (query: string) => {
     bomOptions.value = res.data || []
   } finally { bomSearchLoading.value = false }
 }
-const handleBomSelect = (val: string) => {
+const handleBomSelect = async (val: string) => {
   if (!val) {
     form.bom_code = ''
     form.bom_version = ''
@@ -666,6 +667,17 @@ const handleBomSelect = (val: string) => {
   const [code, version] = val.split('###')
   form.bom_code = code
   form.bom_version = version
+  // 自动计算 BOM 成本并填入 raw_material_cost 和 unit_total_cost
+  try {
+    const res: any = await calculateBomCost({ bom_code: code, bom_version: version })
+    if (res.code === 200 && typeof res.data === 'number') {
+      form.raw_material_cost = res.data
+      form.unit_total_cost = res.data
+    }
+  } catch (e) {
+    // 计算失败不影响现有输入
+    console.warn('BOM 成本计算失败', e)
+  }
 }
 
 // ------------------------------------
@@ -1087,4 +1099,4 @@ onMounted(() => {
 .product-dropdown { width: 580px !important; }
 .product-dropdown .el-select-dropdown__wrap { max-height: 320px !important; }
 .product-dropdown .el-input__suffix { z-index: 10; }
-</style>
+</style>