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

server/src/routes/stats.ts

@@ -7,11 +7,28 @@ const router = Router()
 
 router.get('/overview', async (req: AuthRequest, res: Response) => {
   try {
-    const { month } = req.query
-    const m = (month as string) || getCurrentMonth()
-    const range = getMonthRange(m)
-    if (!range) return res.status(400).json({ code: 40001, message: '月份格式无效' })
-    const { startDate, endDate } = range
+    const { month, startDate: qStart, endDate: qEnd } = req.query
+
+    let startDate: string
+    let endDate: string
+    let elapsedDays = 1
+
+    if (qStart && qEnd) {
+      // 按日期范围查询（用于今日等场景）
+      startDate = qStart as string
+      endDate = qEnd as string
+      elapsedDays = 1
+    } else {
+      const m = (month as string) || getCurrentMonth()
+      const range = getMonthRange(m)
+      if (!range) return res.status(400).json({ code: 40001, message: '月份格式无效' })
+      startDate = range.startDate
+      endDate = range.endDate
+      const now = new Date()
+      const [year, mon] = m.split('-').map(Number)
+      const isCurrentMonth = year === now.getFullYear() && mon === now.getMonth() + 1
+      elapsedDays = isCurrentMonth ? now.getDate() : new Date(year, mon, 0).getDate()
+    }
 
     const [rows] = await pool.query(
       `SELECT
@@ -22,11 +39,6 @@ router.get('/overview', async (req: AuthRequest, res: Response) => {
       [req.userId, startDate, endDate]
     )
     const row = (rows as any[])[0]
-
-    const now = new Date()
-    const [year, mon] = m.split('-').map(Number)
-    const isCurrentMonth = year === now.getFullYear() && mon === now.getMonth() + 1
-    const elapsedDays = isCurrentMonth ? now.getDate() : new Date(year, mon, 0).getDate()
     const daily = elapsedDays > 0 ? Math.round(row.expense / elapsedDays) : 0
 
     res.json({