feat(mileage): 点击车辆卡片展示近 15 日行驶里程明细

- 后端新增 GET /api/mileage/vehicle/:plate/recent，返回近 N 天 + 今日的每日里程
- 缺失日补全为 dailyKm=0 + isDataSynced=false
- 前端新增 VehicleDetailModal：头部信息、合计/日均/有数据天 KPI、近 N 日柱状图、每日明细列表
- 移动端从底部弹起；缺失日柱条置灰，明细行标注「未对接」
- 卡片点击改为打开弹窗（不再复制车牌）

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/server/routes/mileage/vehicle-recent.ts

@@ -0,0 +1,70 @@
+import { Hono } from 'hono';
+import mileagePool from '../../mileage-db.js';
+
+const app = new Hono();
+
+interface DayRow {
+  date: string;
+  daily_km: string | number | null;
+  source: string | null;
+}
+
+function fmt(d: Date): string {
+  const y = d.getFullYear();
+  const m = String(d.getMonth() + 1).padStart(2, '0');
+  const dd = String(d.getDate()).padStart(2, '0');
+  return `${y}-${m}-${dd}`;
+}
+
+app.get('/:plate/recent', async (c) => {
+  const plate = c.req.param('plate');
+  const days = Math.min(Math.max(Number(c.req.query('days')) || 15, 1), 60);
+
+  if (!plate) return c.json({ days: [] }, 400);
+
+  try {
+    const [rows] = await mileagePool.execute(
+      `SELECT DATE_FORMAT(stat_date, '%Y-%m-%d') AS date, daily_km, source
+       FROM v_vehicle_daily_stats
+       WHERE plate = ?
+         AND stat_date >= DATE_SUB(CURDATE(), INTERVAL ? DAY)
+         AND stat_date <= CURDATE()
+       ORDER BY stat_date`,
+      [plate, days]
+    ) as [DayRow[], unknown];
+
+    // 同一 plate 同一天可能有多个数据源，取最大 daily_km
+    const map = new Map<string, { dailyKm: number; source: string }>();
+    for (const r of rows) {
+      const km = Number(r.daily_km) || 0;
+      const src = r.source || 'NONE';
+      const existing = map.get(r.date);
+      if (!existing || km > existing.dailyKm) {
+        map.set(r.date, { dailyKm: km, source: src });
+      }
+    }
+
+    // 补全：从 N 天前到今天（含），每天一条
+    const today = new Date();
+    today.setHours(0, 0, 0, 0);
+    const result: { date: string; dailyKm: number; isDataSynced: boolean }[] = [];
+    for (let i = days; i >= 0; i--) {
+      const d = new Date(today);
+      d.setDate(today.getDate() - i);
+      const key = fmt(d);
+      const hit = map.get(key);
+      result.push({
+        date: key,
+        dailyKm: hit?.dailyKm ?? 0,
+        isDataSynced: !!hit && hit.source !== 'NONE',
+      });
+    }
+
+    return c.json({ plate, days: result });
+  } catch (e: unknown) {
+    console.error('vehicle recent error:', e);
+    return c.json({ plate, days: [] }, 500);
+  }
+});
+
+export default app;