refactor(zfgl): 优化收据和退据生成逻辑- 将默认支付方式从"现金"改为"转账"

-合并支付方式选项，简化为"转账"和"扫码"
- 增加收据和退据已存在时的处理逻辑- 优化操作按钮布局，每个操作独立占一行

src/views/zfgl/zfhtgl.vue

@@ -35,6 +35,7 @@ import {
 import { renderAsync } from 'docx-preview'
 import VuePdfEmbed from 'vue-pdf-embed'
 import { clientGet, clientPost } from '@/utils/request.ts'
+import { BaseResponse, PageType } from '@/utils/types.ts' // 新增：导入BaseResponse和PageType
 
 // 接口定义
 export interface AContractInfo {
@@ -144,7 +145,7 @@ const currentReceiptContractNumber = ref('')
 // 收据表单数据
 const receiptForm = reactive<ReceiptDto>({
   paymentUnit: '',
-  paymentMethod: '现金',
+  paymentMethod: '转账',
   rmb: 0,
   yj: 0,
   zj: 0,
@@ -172,10 +173,8 @@ const returnReceiptForm = reactive<ReturnReceiptDto>({
 
 // 付款方式选项
 const paymentMethods = [
-  { label: '现金', value: '现金' },
-  { label: '银行转账', value: '银行转账' },
-  { label: '支付宝', value: '支付宝' },
-  { label: '微信支付', value: '微信支付' },
+  { label: '转账', value: '转账' },
+  { label: '扫码', value: '扫码' },
   { label: '其他', value: '其他' },
 ]
 
@@ -583,7 +582,7 @@ const openReceiptDialog = async (contractId: string, contractNumber: string) =>
   // 重置表单
   Object.assign(receiptForm, {
     paymentUnit: '',
-    paymentMethod: '现金',
+    paymentMethod: '转账',
     rmb: 0,
     yj: 0,
     zj: 0,
@@ -647,10 +646,30 @@ const generateReceipt = async () => {
     )
 
     receiptGenerating.value = true
-
     const response = await gainReceipt(currentReceiptContractId.value, receiptForm)
 
-    if (response.code === 200 && response.data) {
+    if (response.code === 999) {
+      // 收据已存在，让用户选择是否预览
+      ElMessage.success('收据已存在！')
+      receiptVisible.value = false
+
+      try {
+        await ElMessageBox.confirm(
+          `合同 ${currentReceiptContractNumber.value} 的收据已存在，是否要预览该收据？`,
+          '收据已存在',
+          {
+            confirmButtonText: '预览收据',
+            cancelButtonText: '不预览',
+            type: 'info',
+          },
+        )
+        // 用户选择预览
+        await previewDocument(response.data, `${currentReceiptContractNumber.value} - 收据`)
+      } catch (error) {
+        // 用户选择不预览，不做任何操作
+        console.log('用户选择不预览收据')
+      }
+    } else if (response.code === 200 && response.data) {
       ElMessage.success('收据生成成功！')
       // 自动预览生成的收据
       const receiptUrl = response.data
@@ -678,7 +697,7 @@ const closeReceiptDialog = () => {
   // 重置表单
   Object.assign(receiptForm, {
     paymentUnit: '',
-    paymentMethod: '现金',
+    paymentMethod: '转账',
     rmb: 0,
     yj: 0,
     zj: 0,
@@ -794,13 +813,33 @@ const generateReturnReceipt = async () => {
     )
 
     returnReceiptGenerating.value = true
-
     const response = await gainReturnReceipt(
       currentReturnReceiptContractId.value,
       returnReceiptForm,
     )
 
-    if (response.code === 200 && response.data) {
+    if (response.code === 999) {
+      // 退据已存在，让用户选择是否预览
+      ElMessage.success('退据已存在！')
+      returnReceiptVisible.value = false
+
+      try {
+        await ElMessageBox.confirm(
+          `合同 ${currentReturnReceiptContractNumber.value} 的退据已存在，是否要预览该退据？`,
+          '退据已存在',
+          {
+            confirmButtonText: '预览退据',
+            cancelButtonText: '不预览',
+            type: 'info',
+          },
+        )
+        // 用户选择预览
+        await previewDocument(response.data, `${currentReturnReceiptContractNumber.value} - 退据`)
+      } catch (error) {
+        // 用户选择不预览，不做任何操作
+        console.log('用户选择不预览退据')
+      }
+    } else if (response.code === 200 && response.data) {
       ElMessage.success('退据生成成功！')
       // 自动预览生成的退据
       const returnReceiptUrl = response.data
@@ -978,24 +1017,28 @@ onMounted(() => {
         <ElTableColumn label="操作" width="160" fixed="right">
           <template #default="{ row }">
             <div class="flex flex-col gap-1">
-              <ElButton
-                type="primary"
-                size="small"
-                text
-                :icon="Receipt"
-                @click="openReceiptDialog(row.id, row.contractNumber)"
-              >
-                获取收据
-              </ElButton>
-              <ElButton
-                type="warning"
-                size="small"
-                text
-                :icon="RotateCcw"
-                @click="openReturnReceiptDialog(row.id, row.contractNumber)"
-              >
-                获取退据
-              </ElButton>
+              <div>
+                <ElButton
+                  type="primary"
+                  size="small"
+                  text
+                  :icon="Receipt"
+                  @click="openReceiptDialog(row.id, row.contractNumber)"
+                >
+                  获取收据
+                </ElButton>
+              </div>
+              <div>
+                <ElButton
+                  type="warning"
+                  size="small"
+                  text
+                  :icon="RotateCcw"
+                  @click="openReturnReceiptDialog(row.id, row.contractNumber)"
+                >
+                  获取退据
+                </ElButton>
+              </div>
             </div>
           </template>
         </ElTableColumn>