fix: v1.4 Bug 修复与体验优化

- 修复所有日期相关逻辑使用 UTC 导致时区偏移问题
- 首页今日数据改用 stats API 聚合查询，消除 100 条上限
- 账单分页加载添加请求序号，防止并发覆盖
- 统计页 maxSingle 改为按金额排序
- 统计页 tab 切换时刷新月对比数据
- 首页 onShow 跳过首次加载，避免双重请求
- 今日卡片同时展示支出/收入，骨架屏对齐
- 账单页统一左滑删除，去掉长按
- 后端 transaction 支持 sortBy 参数
- 后端 stats overview 支持 startDate/endDate 查询

client/src/pages/index/index.vue

@@ -37,17 +37,28 @@
     </view>
 
     <view class="today-card" v-if="!loading">
-      <view class="today-left">
+      <view class="today-item">
         <text class="today-label">今日支出</text>
-        <text class="today-amount">{{ formatAmount(todayExpense) }}</text>
+        <text class="today-amount expense">{{ formatAmount(todayExpense) }}</text>
       </view>
-      <view class="today-right">
-        <text class="today-count">{{ todayCount }}笔</text>
+      <view class="today-divider"></view>
+      <view class="today-item">
+        <text class="today-label">今日收入</text>
+        <text class="today-amount income">{{ formatAmount(todayIncome) }}</text>
       </view>
+      <view class="today-count">{{ todayCount }}笔</view>
     </view>
     <view class="today-card" v-else>
-      <Skeleton width="200rpx" height="28rpx" variant="text" />
-      <Skeleton width="160rpx" height="48rpx" variant="rect" />
+      <view class="today-item">
+        <Skeleton width="96rpx" height="24rpx" variant="text" />
+        <Skeleton width="140rpx" height="36rpx" variant="rect" />
+      </view>
+      <view class="today-divider"></view>
+      <view class="today-item">
+        <Skeleton width="96rpx" height="24rpx" variant="text" />
+        <Skeleton width="140rpx" height="36rpx" variant="rect" />
+      </view>
+      <Skeleton width="48rpx" height="22rpx" variant="text" />
     </view>
 
     <view class="quick-actions">
@@ -118,6 +129,7 @@ const recentTx = ref<any[]>([])
 const loading = ref(true)
 const loadError = ref(false)
 const todayExpense = ref(0)
+const todayIncome = ref(0)
 const todayCount = ref(0)
 
 const greeting = computed(() => {
@@ -133,16 +145,17 @@ async function loadData() {
   try {
     loading.value = true
     loadError.value = false
-    const today = new Date().toISOString().slice(0, 10)
+    const now = new Date()
+    const today = `${now.getFullYear()}-${String(now.getMonth() + 1).padStart(2, '0')}-${String(now.getDate()).padStart(2, '0')}`
     await Promise.all([
       statsStore.fetchOverview(),
       budgetStore.fetchBudget(),
       txStore.fetchTransactions({ page: 1 }),
-      fetchTodayExpense(today)
+      fetchTodayData(today)
     ])
     overview.value = statsStore.overview
     budget.value = budgetStore.budget
-    recentTx.value = txStore.transactions.slice(0, 10)
+    recentTx.value = txStore.transactions.slice(0, 5)
   } catch (e) {
     console.error('Load error:', e)
     loadError.value = true
@@ -151,26 +164,28 @@ async function loadData() {
   }
 }
 
-async function fetchTodayExpense(today: string) {
+async function fetchTodayData(today: string) {
   try {
     const { request } = await import('@/utils/request')
-    const data = await request<any>({
-      url: '/transactions',
-      data: { page: 1, pageSize: 100, type: 'expense', startDate: today, endDate: today }
-    })
-    todayExpense.value = data.list.reduce((sum: number, t: any) => sum + t.amount, 0)
-    todayCount.value = data.list.length
+    const data = await request<any>({ url: '/stats/overview', data: { startDate: today, endDate: today } })
+    todayExpense.value = data.expense || 0
+    todayIncome.value = data.income || 0
+    todayCount.value = data.count || 0
   } catch {
     todayExpense.value = 0
+    todayIncome.value = 0
     todayCount.value = 0
   }
 }
 
-onMounted(() => loadData())
+const initialLoaded = ref(false)
+onMounted(() => {
+  loadData().finally(() => { initialLoaded.value = true })
+})
 
 // Refresh data when returning from other pages (e.g., after adding a transaction)
 onShow(() => {
-  if (!loading.value) loadData()
+  if (initialLoaded.value && !loading.value) loadData()
 })
 
 onPullDownRefresh(() => {
@@ -311,11 +326,12 @@ function goBills() {
   border: 2rpx solid #F0E0D6;
   box-shadow: 4rpx 4rpx 12rpx rgba(45, 27, 27, 0.08);
   display: flex;
-  justify-content: space-between;
   align-items: center;
+  gap: 24rpx;
 }
 
-.today-left {
+.today-item {
+  flex: 1;
   display: flex;
   flex-direction: column;
   gap: 8rpx;
@@ -328,18 +344,24 @@ function goBills() {
 
 .today-amount {
   font-family: 'Fredoka', sans-serif;
-  font-size: 36rpx;
+  font-size: 32rpx;
   font-weight: 600;
-  color: #FF6B6B;
+
+  &.expense { color: #FF6B6B; }
+  &.income { color: #7BC67E; }
 }
 
-.today-right {
-  text-align: right;
+.today-divider {
+  width: 2rpx;
+  height: 56rpx;
+  background: #F0E0D6;
+  flex-shrink: 0;
 }
 
 .today-count {
-  font-size: 24rpx;
-  color: #8B7E7E;
+  font-size: 22rpx;
+  color: #BFB3B3;
+  flex-shrink: 0;
 }
 
 .quick-actions {