feat(分页组件): 增强提交按钮和上一页按钮的配置能力

支持通过 submitButton 对象配置提交按钮文本和上一页按钮的行为

 <!--
  * @Date: 2025-11-18 16:17:40
  * @LastEditors: hookehuyr hookehuyr@gmail.com
- * @LastEditTime: 2025-11-20 15:44:14
+ * @LastEditTime: 2025-11-20 17:46:05
  * @FilePath: /data-table/src/components/PaginationField/index.vue
  * @Description: 分页组件
 -->
@@ -9,9 +9,16 @@
   <div class="pagination-field">
     <div class="indicator">第{{ current + 1 }}页 / 共{{ total }}页</div>
     <div class="actions">
-      <van-button v-if="showPrev" :disabled="prevDisabled || current === 0" round type="primary" class="btn" @click="onPrev">{{ prevLabel }}</van-button>
+      <van-button
+        v-if="showPrev"
+        :disabled="prev_disabled_effective || current === 0"
+        round
+        type="primary"
+        class="btn"
+        @click="onPrev"
+      >{{ prev_label_effective }}</van-button>
       <van-button v-if="showNext" round type="primary" class="btn" @click="onNext">{{ nextLabel }}</van-button>
-      <van-button v-if="showSubmit" round type="primary" class="btn" @click="onSubmit">{{ submitLabel }}</van-button>
+      <van-button v-if="showSubmit" round type="primary" class="btn" @click="onSubmit">{{ submitButton.text }}</van-button>
     </div>
   </div>
   <div class="placeholder" />
@@ -26,7 +33,7 @@ const props = defineProps({
     isLast: { type: Boolean, default: false },
     prevLabel: { type: String, default: '上一页' },
     nextLabel: { type: String, default: '下一页' },
-    submitLabel: { type: String, default: '提交' },
+    submitButton: { type: Object, default: { text: '提交', back_title: '上一页', is_back: true } },
     prevDisabled: { type: Boolean, default: false },
 })
 
@@ -36,6 +43,24 @@ const showPrev = computed(() => props.current > 0)
 const showNext = computed(() => props.current < props.total - 1)
 const showSubmit = computed(() => props.current === props.total - 1)
 
+/**
+ * @description 计算上一页按钮文案（最后一页用提交按钮配置的返回文案）
+ * @returns {import('vue').ComputedRef<string>}
+ */
+const prev_label_effective = computed(() => {
+    // 最后一页使用 submitButton.back_title，否则使用外部传入的 prevLabel
+    return showSubmit.value ? (props.submitButton?.back_title || props.prevLabel) : props.prevLabel
+})
+
+/**
+ * @description 计算上一页按钮禁用状态（最后一页用提交按钮配置的 is_back）
+ * @returns {import('vue').ComputedRef<boolean>}
+ */
+const prev_disabled_effective = computed(() => {
+    // 最后一页直接使用 submitButton.is_back 替换 prevDisabled；否则使用外部传入的 prevDisabled
+    return showSubmit.value ? (!props.submitButton?.is_back ?? props.prevDisabled) : props.prevDisabled
+})
+
 const onPrev = () => emit('prev')
 const onNext = () => emit('next')
 const onSubmit = () => emit('submit')

 <!--
  * @Date: 2022-07-18 10:22:22
  * @LastEditors: hookehuyr hookehuyr@gmail.com
- * @LastEditTime: 2025-11-20 15:44:03
+ * @LastEditTime: 2025-11-20 17:47:01
  * @FilePath: /data-table/src/views/index.vue
  * @Description: 首页
 -->
@@ -35,7 +35,7 @@
           :is-last="current_page_index === filtered_pages.length - 1"
           :prev-label="page_nav.prev_text"
           :next-label="page_nav.next_text"
-          :submit-label="PCommit.text ? PCommit.text : '提交'"
+          :submit-button="PCommit"
           :prev-disabled="page_nav.prev_disabled"
           @prev="handlePrev"
           @next="handleNext"
@@ -471,6 +471,8 @@ onMounted(async () => {
     PCommit.value = {
       text: page_commit.text,
       visible: !page_commit.invisible,
+      is_back: page_commit.is_back,
+      back_title: page_commit.back_title,
     };
   }