fix: 修复统计报表移动端适屏问题

- Shell main 添加 min-w-0 overflow-x-hidden 防止 flex 子元素溢出
- trend API 排除当天数据 (stat_date < CURDATE())，只返回前7天
- StatisticsView 移除移动端 overflow-hidden，改为仅 landscape 模式
- 图表和列表卡片在移动端正确显示全宽内容

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/server/routes/mileage.ts

@@ -202,7 +202,7 @@ app.get('/trend', async (c) => {
     let sql = `
       SELECT DATE_FORMAT(stat_date, '%m-%d') as date, SUM(daily_km) as mileage
       FROM v_vehicle_daily_stats
-      WHERE stat_date >= DATE_SUB(CURDATE(), INTERVAL ? DAY)
+      WHERE stat_date >= DATE_SUB(CURDATE(), INTERVAL ? DAY) AND stat_date < CURDATE()
     `;
     const params: any[] = [days];