feat(scrap): 报废作业页重构为「按单扫码执行」，对齐出库版式

create.vue 由「直接报废」页（492 行）重写为按单执行页：
  · 顶部选择已批准申请单（scope=executable, status=1）；
  · 载入 items_json 为待执行清单，逐项显示批准数量与已扫数量；
  · 扫码头按 (source_table, stock_id) 匹配批准明细，
    不在单内或超批准量时红色 toast + 震动阻断，禁止入车；
  · 支持 ?requestId= 深链直达；提交实扫 payload 到 execute 接口。

审批页的「执行报废」由弹窗盲执行改为跳转本页（router.push + query.requestId），
移除 executeVisible/confirmExecute 等已失效代码；路由标题改为「按单报废执行」。
executeScrapByRequest 增加 items 参数。

inventory-web/src/views/operation/scrap/approval/index.vue

@@ -159,45 +159,18 @@
       </template>
     </el-dialog>
 
-    <!-- 按单报废执行 Dialog（严格按选单内容扣减） -->
-    <el-dialog v-model="executeVisible" title="按单报废（确认扣减库存）" width="760px" destroy-on-close>
-      <el-alert
-          type="warning" :closable="false" show-icon
-          title="确认后将严格按下列“选单明细”扣减对应库存行的可用数量并写入报废流水，不可撤销。"
-          style="margin-bottom:12px;"
-      />
-      <el-table :data="execItems" border size="small" max-height="340">
-        <el-table-column type="index" label="序号" width="60" align="center" />
-        <el-table-column label="来源" width="90" align="center">
-          <template #default="{ row: item }">
-            <el-tag size="small">{{ sourceLabel(item.source_table) }}</el-tag>
-          </template>
-        </el-table-column>
-        <el-table-column prop="name" label="名称" min-width="140" show-overflow-tooltip />
-        <el-table-column prop="spec_model" label="规格型号" min-width="120" show-overflow-tooltip />
-        <el-table-column prop="location" label="库位" width="110" />
-        <el-table-column prop="batch_number" label="批次/序列号" width="130" />
-        <el-table-column label="报废数量" width="100" align="center">
-          <template #default="{ row: item }">
-            <span style="color:#F56C6C;font-weight:bold;">{{ item.scrap_qty }}</span>
-          </template>
-        </el-table-column>
-      </el-table>
-      <template #footer>
-        <el-button @click="executeVisible = false">取消</el-button>
-        <el-button type="warning" :loading="executing" @click="confirmExecute">确认执行报废</el-button>
-      </template>
-    </el-dialog>
   </div>
 </template>
 
 <script setup lang="ts">
 import { ref, computed, onMounted } from 'vue'
+import { useRouter } from 'vue-router'
 import { Refresh, Warning } from '@element-plus/icons-vue'
 import { ElMessage, ElMessageBox } from 'element-plus'
-import { getScrapApprovals, approveScrapRequest, executeScrapByRequest } from '@/api/scrap'
+import { getScrapApprovals, approveScrapRequest } from '@/api/scrap'
 import { useUserStore } from '@/stores/user'
 
+const router = useRouter()
 const userStore = useUserStore()
 
 // --- 状态 ---
@@ -216,11 +189,6 @@ const currentRejectRow = ref<any>(null)
 const rejectReason = ref('')
 const rejectLoading = ref(false)
 
-// 执行 Dialog
-const executeVisible = ref(false)
-const executeRow = ref<any>(null)
-const execItems = ref<any[]>([])
-const executing = ref(false)
 
 const userNameCache = ref<Record<number, string>>({})
 
@@ -313,24 +281,9 @@ const confirmReject = async () => {
   } finally { rejectLoading.value = false }
 }
 
-// --- 按单报废执行（严格按选单明细） ---
+// --- 按单报废执行：跳转到「按单报废执行」扫码页，由实扫明细驱动扣减 ---
 const openExecute = (row: any) => {
-  executeRow.value = row
-  execItems.value = row.items || []
-  executeVisible.value = true
-}
-const confirmExecute = async () => {
-  if (!executeRow.value) return
-  executing.value = true
-  try {
-    await executeScrapByRequest(executeRow.value.id)
-    ElMessage.success('已执行报废并扣减库存')
-    executeVisible.value = false
-    await fetchData()
-  } catch (err: any) {
-    // 拦截器已弹后端业务错误；无响应才算网络异常
-    if (!err?.response) ElMessage.error('网络异常，请重试')
-  } finally { executing.value = false }
+  router.push({ path: '/scrap/create', query: { requestId: row.id } })
 }
 
 onMounted(() => { fetchData() })