refactor: 统一账单列表组件，封装 BillListComponent

- 创建 BillListComponent 组件（基于 v2 风格，紧凑布局）
  - 支持筛选（类型、分类、日期范围）和排序（金额、时间）
  - 支持分页加载、左滑删除、点击详情、多选模式
  - 支持 API 自动加载和 Custom 自定义数据两种模式
- 迁移 6 个页面/组件到新组件：
  - TransactionsRecord.vue
  - EmailRecord.vue
  - ClassificationNLP.vue
  - UnconfirmedClassification.vue
  - BudgetCard.vue
  - ReasonGroupList.vue
- 删除旧版 TransactionList 组件
- 保留 CalendarV2 的特殊版本（有专用功能）
- 添加完整的使用文档和 JSDoc 注释

Web/src/views/UnconfirmedClassification.vue

@@ -74,11 +74,13 @@
                 </div>
               </template>
 
-              <TransactionList
-                :transactions="classifyNode.children.map(c => c.transaction)"
+              <BillListComponent
+                data-source="custom"
+                :transactions="classifyNode.children.map((c) => c.transaction)"
                 :show-delete="false"
                 :show-checkbox="true"
                 :selected-ids="selectedIds"
+                :enable-filter="false"
                 @click="handleTransactionClick"
                 @update:selected-ids="handleUpdateSelectedIds"
               />
@@ -103,7 +105,7 @@ import { useRouter } from 'vue-router'
 import { showToast, showConfirmDialog } from 'vant'
 import { getUnconfirmedTransactionList, confirmAllUnconfirmed } from '@/api/transactionRecord'
 import TransactionDetail from '@/components/TransactionDetail.vue'
-import TransactionList from '@/components/TransactionList.vue'
+import BillListComponent from '@/components/Bill/BillListComponent.vue'
 
 const router = useRouter()
 const loading = ref(false)
@@ -154,9 +156,13 @@ const handleConfirmSelected = async () => {
 }
 
 const formatAmount = (amount) => {
-  if (amount === null || amount === undefined) {return ''}
+  if (amount === null || amount === undefined) {
+    return ''
+  }
   const num = parseFloat(amount)
-  if (isNaN(num)) {return ''}
+  if (isNaN(num)) {
+    return ''
+  }
   return num.toFixed(2)
 }
 
@@ -321,7 +327,7 @@ onMounted(() => {
 
 .classify-collapse :deep(.van-cell-group--inset) {
   margin-left: -24px;
-  width: calc(100vw - 48px)
+  width: calc(100vw - 48px);
 }
 
 :deep(.van-nav-bar) {