fix: validateUnique 编辑模式下值未变时跳过重复校验，仅值改变时才检查冲突

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

@@ -1029,6 +1029,13 @@ const hasFormFieldPermission = (fieldName: string) => {
 const validateUnique = (rule: any, value: string, callback: any) => {
   if (!value) return callback()
   const currentId = form.id != null ? Number(form.id) : null
+  // 编辑模式：如果值未改变，跳过重复校验（用户可能在编辑其他字段）
+  if (dialogStatus.value === 'update' && currentId != null) {
+    const self = tableData.value.find((r: any) => Number(r.id) === currentId)
+    if (self && String(self[rule.field]) === value) {
+      return callback()  // 值未变，无需校验重复
+    }
+  }
   const isDuplicate = tableData.value.some((row: any) => {
     if (dialogStatus.value === 'update' && currentId != null && Number(row.id) === currentId) return false
     if (rule.field === 'serial_number' && row.serial_number === value) return true