feat: 部门/业务负责人列表补齐无车辆业务员

/dept-stats 在按车辆聚合后，查询 tab_user 把业务部门内所有在职用户补进 managers 列表，无车辆显示为 0 辆。跳过公务车部门。

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

src/server/routes/vehicles.ts

@@ -690,6 +690,28 @@ app.get('/dept-stats', async (c) => {
     mgrMap.get(mgr)!.push(v);
   }
 
+  // 补齐：业务部门内所有在职用户，即使当前无车辆也需显示
+  const deptNames = Array.from(deptMap.keys()).filter((d) => d !== '公务车');
+  if (deptNames.length > 0) {
+    const placeholders = deptNames.map(() => '?').join(',');
+    const [userRows] = await pool.query<any[]>(
+      `SELECT u.user_name, dep.dep_name
+         FROM tab_user u
+         LEFT JOIN tab_department dep ON dep.id = u.dep_id AND dep.is_deleted = 0
+        WHERE u.is_deleted = 0
+          AND dep.dep_name IN (${placeholders})`,
+      deptNames,
+    );
+    for (const r of userRows as any[]) {
+      const dept = r.dep_name as string | null;
+      const mgr = r.user_name as string | null;
+      if (!dept || !mgr) continue;
+      const mgrMap = deptMap.get(dept);
+      if (!mgrMap) continue;
+      if (!mgrMap.has(mgr)) mgrMap.set(mgr, []);
+    }
+  }
+
   // Compute attendance & avg mileage from realtime data
   const getMileageStats = (vList: Vehicle[]) => {
     const todayActive = vList.filter((v) => (todayMileageMap.get(v.plateNumber) || 0) > 0).length;