fix(admin): 完善弹窗滚动与表单交互布局

src/modules/container-loading/pages/SmartLoadingWorkbenchView.vue

@@ -427,7 +427,8 @@ onMounted(load)
               <tr v-else-if="selectedCandidate.unitType === 'SEALED_PALLET'"><th>整托箱数</th><td colspan="3">整托 {{ selectedCandidate.availablePackageCount }} 箱</td></tr>
               <template v-else>
                 <tr><th>货物摘要</th><td colspan="3"><LineClampText :content="selectedCandidate.goodsSummary || '货物摘要暂缺'" /></td></tr>
-                <tr><th>可用箱数</th><td>{{ selectedCandidate.availablePackageCount }} 箱</td><td colspan="2"><el-form-item label="本次计划装柜箱数" label-position="left" label-width="140px" required><el-input-number v-model="assignForm.packageCount" :min="1" :max="selectedCandidate.availablePackageCount" :step="1" controls-position="right" placeholder="请输入本次分配箱数" /></el-form-item></td></tr>
+                <tr><th>可用箱数</th><td colspan="3">{{ selectedCandidate.availablePackageCount }} 箱</td></tr>
+                <tr><th><label for="cabinet-loading-assignment-count"><span class="assignment-required" aria-hidden="true">*</span>本次计划装柜箱数</label></th><td colspan="3"><el-form-item><el-input-number id="cabinet-loading-assignment-count" v-model="assignForm.packageCount" aria-label="本次计划装柜箱数" aria-required="true" :min="1" :max="selectedCandidate.availablePackageCount" :step="1" controls-position="right" placeholder="请输入本次分配箱数" /></el-form-item></td></tr>
               </template>
             </tbody></table></div>
           </el-form>
@@ -451,6 +452,9 @@ onMounted(load)
 </template>
 
 <style scoped>
+.assignment-table { table-layout: fixed; }
+.assignment-table th { width: 128px; }
+.assignment-required { margin-right: var(--admin-space-1); color: var(--el-color-danger); }
 .workbench { display: grid; gap: var(--admin-space-5); min-width: 0; }
 .workbench-command-bar,.header-actions,.row-actions,.meter-title { display: flex; align-items: center; }
 .workbench-command-bar { justify-content: space-between; gap: var(--admin-space-5);  }