style(ui): 统一弹窗及独立表单页按钮文案和样式调整

- 将所有弹窗及独立表单页中的“返回”按钮文案统一改为“取消”
- 独立表单页footer的Avue提交与清空按钮去除内置图标，仅保留文字显示
- 更新相关页面和组件按钮文案，包括业务表单、支付表单、客户档案等
- 规范底部操作栏按钮顺序及样式，确保主次操作区分明显
- 修复部分组件页脚按钮文案，保持全站一致性

src/views/vehicle/customer-archive.vue

@@ -802,7 +802,7 @@
       <div class="archive-form__footer">
         <!-- 次要：独立页返回 / 只读关闭 / 弹窗取消 -->
         <el-button @click="closeArchive">{{
-          readonly ? '关闭' : isArchivePage ? '返回' : '取消'
+          readonly ? '关闭' : '取消'
         }}</el-button>
         <el-button type="primary" plain v-if="!readonly" @click="saveArchive">保存</el-button>
         <el-button type="primary" v-if="!readonly" @click="saveAndSubmitArchive">提交</el-button>
@@ -866,7 +866,7 @@
       </section-card>
       <template #footer>
         <div class="contact-dialog__footer-actions">
-          <el-button @click="contactBox = false">返回</el-button>
+          <el-button @click="contactBox = false">取消</el-button>
           <el-button type="primary" plain @click="saveContact">保存</el-button>
         </div>
       </template>
@@ -964,7 +964,7 @@
       </section-card>
       <template #footer>
         <div class="receipt-dialog__footer-actions">
-          <el-button @click="receiptBox = false">返回</el-button>
+          <el-button @click="receiptBox = false">取消</el-button>
           <el-button type="primary" plain @click="saveReceipt">保存</el-button>
         </div>
       </template>
@@ -1084,7 +1084,7 @@
       </el-form>
       <template #footer>
         <div class="invoice-dialog__footer-actions">
-          <el-button @click="invoiceBox = false">返回</el-button>
+          <el-button @click="invoiceBox = false">取消</el-button>
           <el-button type="primary" plain @click="saveInvoice">保存</el-button>
         </div>
       </template>
@@ -1347,7 +1347,7 @@
             <span>自评：{{ formatScoreValue(currentScore.selfScore) }}分</span>
             <span>复评：{{ formatScoreValue(currentScore.reviewScore) }}分</span>
           </div>
-          <el-button @click="scoreBox = false">返回</el-button>
+          <el-button @click="scoreBox = false">取消</el-button>
           <el-button type="primary" plain v-if="!readonly" @click="saveScoreDetail">保存</el-button>
           <el-button
             v-if="!readonly && hasPermission('customer_type_re_cert')"