feat(outbound): 出库流程强化（缺料防漏 + 完全移除直接出库）

① BOM 清单 SKU 改为规格型号（getBomWithStock 返回 children 无 sku，只有 child_spec）
② 缺货清单自动写入出库申请备注（借鸡生蛋：历史欠料永久留存在申请单）
③ 打印单底部增加欠料待补签收区（补料人签字/日期）
④ 有缺料时阻断式二次确认，防手快漏看
⑤ 完全移除直接出库模式，所有出库必须按单出库
   - create.vue 删除 radio 切换、direct 相关逻辑
   - 提交前强制校验已选择审批申请单

inventory-web/src/views/outbound/create.vue

@@ -15,19 +15,14 @@
         </div>
       </template>
 
-      <!-- ★ 出库模式切换 -->
+      <!-- ★ 出库模式：仅支持按单出库（已移除直接出库） -->
       <div class="mode-switch-bar">
-        <el-radio-group v-model="outboundMode" size="default" @change="handleModeChange">
-          <el-radio-button value="by-request">按单出库</el-radio-button>
-          <el-radio-button value="direct">直接出库</el-radio-button>
-        </el-radio-group>
-        <span class="mode-hint">
-          {{ outboundMode === 'by-request' ? '需先选择已审批通过的申请单' : '无需审批单，自由扫码出库' }}
-        </span>
+        <el-tag type="primary" size="large" style="font-size: 14px;">按单出库</el-tag>
+        <span class="mode-hint">请先选择已审批通过的申请单，再扫码出库</span>
       </div>
 
       <!-- ★ 按单出库：审批单选择 -->
-      <div v-if="outboundMode === 'by-request'" class="approval-request-select">
+      <div class="approval-request-select">
         <el-select
             v-model="selectedRequestId"
             placeholder="请选择已审批通过的出库申请单"
@@ -54,7 +49,7 @@
       </div>
 
       <!-- ★ 按单出库：计划清单预览 -->
-      <div v-if="outboundMode === 'by-request' && selectedRequest" class="planned-items-section">
+      <div v-if="selectedRequest" class="planned-items-section">
         <div class="planned-header">
           <span class="planned-title">计划出库清单</span>
           <el-tag type="success" size="small">{{ selectedRequest.items?.length || 0 }} 种</el-tag>
@@ -79,7 +74,7 @@
 
       <div class="scan-section">
 
-        <template v-if="outboundMode === 'by-request' && !selectedRequestId">
+        <template v-if="!selectedRequestId">
           <div class="camera-placeholder" style="background-color: #f5f5f5; cursor: not-allowed;">
             <el-icon :size="40" color="#909399"><CameraFilled /></el-icon>
             <span class="text">请先选择审批单</span>
@@ -304,7 +299,7 @@ const barcodeRef = ref()
 const formRef = ref()
 
 // ★ 双轨制模式
-const outboundMode = ref<'by-request' | 'direct'>('by-request')  // 'by-request' | 'direct'
+// ★ 已移除直接出库模式，所有出库必须按单出库（通过 selectedRequest 校验）
 const approvalRequests = ref<any[]>([])
 const selectedRequest = ref<any>(null)
 const requestsLoading = ref(false)
@@ -355,18 +350,6 @@ const selectedRequestId = computed({
 
 const plannedItems = computed(() => selectedRequest.value?.items ?? [])
 
-// ★ 模式切换
-const handleModeChange = () => {
-  selectedRequest.value = null
-  selectedRequestId.value = null
-  cartItems.value = []
-  form.consumer_name = ''
-  form.remark = ''
-  signatureFile.value = null
-  signaturePreviewUrl.value = ''
-  barcodeInput.value = ''
-}
-
 // ★ 加载已审批通过的申请单
 const loadApprovalRequests = async () => {
   requestsLoading.value = true
@@ -489,7 +472,7 @@ const handleManualInput = async () => {
   if (!code) return
 
   // ★ 按单出库模式：必须先选择申请单
-  if (outboundMode.value === 'by-request' && !selectedRequest.value) {
+  if (!selectedRequest.value) {
     ElMessage.warning('请先选择要出库的审批申请单')
     return
   }
@@ -503,14 +486,12 @@ const handleManualInput = async () => {
       const item = cartItems.value[existIndex]
 
       // ★ 按单模式：追加时仍需校验计划数量
-      if (outboundMode.value === 'by-request') {
-        const err = validateAgainstPlan(item.name, item.spec_model, 1)
-        if (err) {
-          ElMessage.error(err)
-          if (navigator.vibrate) navigator.vibrate([200, 100, 200])
-          barcodeInput.value = ''
-          return
-        }
+      const err = validateAgainstPlan(item.name, item.spec_model, 1)
+      if (err) {
+        ElMessage.error(err)
+        if (navigator.vibrate) navigator.vibrate([200, 100, 200])
+        barcodeInput.value = ''
+        return
       }
 
       const maxQty = parseFloat(item.available_quantity)
@@ -540,14 +521,12 @@ const handleManualInput = async () => {
       }
 
       // ★ 按单模式：扫码加入前校验是否在计划清单内
-      if (outboundMode.value === 'by-request') {
-        const err = validateAgainstPlan(item.name, item.spec_model, 1)
-        if (err) {
-          ElMessage.error(err)
-          if (navigator.vibrate) navigator.vibrate([200, 100, 200])
-          barcodeInput.value = ''
-          return
-        }
+      const err = validateAgainstPlan(item.name, item.spec_model, 1)
+      if (err) {
+        ElMessage.error(err)
+        if (navigator.vibrate) navigator.vibrate([200, 100, 200])
+        barcodeInput.value = ''
+        return
       }
 
       // 加入购物车
@@ -610,6 +589,11 @@ const submitForm = async () => {
   }
   if (!formRef.value) return
   if (cartItems.value.length === 0) return ElMessage.warning('请先添加商品')
+  // ★ 按单出库：提交前必须已选择审批申请单
+  if (!selectedRequest.value) {
+    ElMessage.warning('请先选择要出库的审批申请单')
+    return
+  }
 
   await formRef.value.validate(async (valid: boolean) => {
     if (!valid) return
@@ -653,7 +637,7 @@ const submitForm = async () => {
       // 3. 组装发给后端的包
       const submitPayload: any = {
         outbound_type: form.outbound_type,
-        request_id: outboundMode.value === 'by-request' && selectedRequest.value ? selectedRequest.value.id : null,
+        request_id: selectedRequest.value ? selectedRequest.value.id : null,
         consumer_name: form.consumer_name,
         operator_name: form.operator_name,
         remark: form.remark,