feat: MileageModule Tab 切换 + DailyReportView 占位

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/modules/mileage/StatisticsView.tsx

@@ -0,0 +1,3 @@
+export default function StatisticsView() {
+  return <div>StatisticsView placeholder</div>;
+}