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/business/components/master-order-dispatch.vue

@@ -175,7 +175,7 @@
             <strong>待提交 <em>{{ pending.length }}</em> 条 <span class="pending-summary-text">（{{ pendingSegmentSummary }}）</span></strong>
             <el-link type="primary" @click="pendingExpanded = !pendingExpanded">{{ pendingExpanded ? '收起待调度列表' : '展开待调度列表' }}</el-link>
           </div>
-          <div class="pending-actions"><el-button @click="$emit('back')">返回</el-button><el-button type="primary" :loading="submitting" @click="submit">确认调度</el-button></div>
+          <div class="pending-actions"><el-button @click="$emit('back')">取消</el-button><el-button type="primary" :loading="submitting" @click="submit">确认调度</el-button></div>
         </div>
         <div v-show="pendingExpanded" class="pending-list">
           <template v-for="(items, segmentNo) in pendingGroups" :key="segmentNo">