feat(web-admin): add plan draft save UI and drafting follow-status filters

Rename pending tab to 待安排/草稿, default-select drafting, and add 暂存 with saveMode.

Co-authored-by: Cursor <cursoragent@cursor.com>

web-admin/src/components/business/pl-plan-form-dialog/index.vue

@@ -254,6 +254,13 @@
         <el-button @click="innerVisible = false">
           <el-icon><Close /></el-icon>取消
         </el-button>
+        <el-button
+          v-if="showDraftButton"
+          :loading="submitLoading"
+          @click="handleSubmit('draft')"
+        >
+          <el-icon><Document /></el-icon>暂存
+        </el-button>
         <el-button
           v-if="showSaveButton"
           :type="showSaveAndArrangeButton ? 'default' : 'primary'"
@@ -320,6 +327,7 @@
     Check,
     Close,
     Delete,
+    Document,
     DocumentCopy,
     FolderOpened,
     Plus,
@@ -482,6 +490,7 @@
   /** 加载详情 / 重置时禁止计划产品 → 段产品自动对齐 */
   const suppressStopProductSync = ref(false)
   const loadedTransportStatus = ref('pending')
+  const loadedFollowStatus = ref('')
   const loadForm = ref<PlanLoadForm>(createEmptyLoadForm())
   const deliveryForms = ref<PlanDeliveryForm[]>([createEmptyDeliveryForm(1)])
   const loadedPlanSnapshot = ref<Plan | null>(null)
@@ -489,6 +498,12 @@
 
   /** 已安排：禁止仅「保存」，须走保存并安排/调整运输，避免计划与地磅等联动字段脱节 */
   const showSaveButton = computed(() => loadedTransportStatus.value !== 'arranged')
+  const showDraftButton = computed(() => {
+    if (!isEdit.value) return true
+    return (
+      loadedFollowStatus.value === 'drafting' || loadedFollowStatus.value === 'pending_arrange'
+    )
+  })
   const showSaveAndArrangeButton = computed(() => {
     if (!isEdit.value) return true
     if (props.openForArrange && loadedTransportStatus.value === 'arranged') return false
@@ -1577,6 +1592,7 @@
 
   function resetForm() {
     loadedTransportStatus.value = 'pending'
+    loadedFollowStatus.value = ''
     loadedPlanSnapshot.value = null
     vehicleBundle.value = null
     selectedDriverId.value = ''
@@ -1669,6 +1685,7 @@
       })
       applyStopsFromPlan(data)
       loadedTransportStatus.value = data.transportStatus || 'pending'
+      loadedFollowStatus.value = data.followStatus || ''
       loadedPlanSnapshot.value = data
       syncCommittedPartyIds()
 
@@ -1731,6 +1748,7 @@
         products: row.products.map((product) => ({ ...product, planProductId: undefined }))
       }))
       loadedTransportStatus.value = 'pending'
+      loadedFollowStatus.value = ''
       syncCommittedPartyIds()
 
       formData.products = await enrichPlanProductLinesAlias(
@@ -1976,11 +1994,51 @@
     return missing
   }
 
-  async function handleSubmit(mode: 'save' | 'saveAndArrange' | 'rearrange' = 'save') {
+  async function handleSubmit(
+    mode: 'draft' | 'save' | 'saveAndArrange' | 'rearrange' = 'save'
+  ) {
     // 必须在 await validate 之前置位，避免连点并发多次 createFull
     if (submitLoading.value) return
     submitLoading.value = true
     try {
+      if (mode === 'draft') {
+        const companyOk = !!(formData.belongsCompany || '').trim()
+        const dateOk = !!(formData.createDate || '').trim()
+        if (!companyOk || !dateOk) {
+          ElMessage.warning('暂存请至少填写归属公司和创建日期')
+          await basicFormRef.value
+            ?.validateField?.(['belongsCompany', 'createDate'])
+            .catch(() => undefined)
+          return
+        }
+        mirrorPlanProductsFromLoad()
+        const draftPayload = {
+          ...buildPlanCommonPayload({ allowClearTransport: isEdit.value }),
+          saveMode: 'draft' as const,
+          hasFreight: formData.hasFreight
+        }
+        let planId = props.planId || ''
+        if (isEdit.value) {
+          if (!props.planId) return
+          await planApi.update(props.planId, draftPayload)
+          planId = props.planId
+        } else {
+          const res = await planApi.createFull(
+            draftPayload as Parameters<typeof planApi.createFull>[0]
+          )
+          const created = pickBxData<Plan>(res)
+          planId = String(created?.id || '')
+          if (!planId) {
+            ElMessage.error('暂存成功但未返回计划 ID')
+            return
+          }
+        }
+        ElMessage.success('暂存成功')
+        innerVisible.value = false
+        emit('success', { planId, arranged: false })
+        return
+      }
+
       const valid = await basicFormRef.value?.validate().catch(() => false)
       if (!valid || !validateBusinessRules()) return
       if (!validateSingleContractPerStop()) return
@@ -2000,7 +2058,10 @@
       }
 
       mirrorPlanProductsFromLoad()
-      const commonPayload = buildPlanCommonPayload({ allowClearTransport: isEdit.value })
+      const commonPayload = {
+        ...buildPlanCommonPayload({ allowClearTransport: isEdit.value }),
+        saveMode: 'formal' as const
+      }
       let planId = props.planId || ''
       const wasCreate = !isEdit.value