fix: 修复插槽问题

src/components/create-order/SubmitBar.vue

@@ -102,6 +102,21 @@
             >
 
             <use-login :custom-button="true" @success="onConfirmBtn">
+              <template slot="login">
+                <button
+                  id="btn"
+                  type="primary"
+                  size="large"
+                  class="van-button van-button--primary"
+                  :disabled="confirmDisabled"
+                  @click="onConfirmBtn"
+                >
+                  <div class="confirm-button-text">{{ confirmBtnText }}</div>
+                  <div class="confirm-button-tip-text" v-if="confirmBtnTipText">
+                    {{ confirmBtnTipText }}
+                  </div>
+                </button>
+              </template>
               <template v-slot="loginProps">
                 <button
                   id="btn"