fix: 修复 QA 巡检发现的 console 告警——useForm 未连接、RangePicker 空值禁用、dashboard 占用率类型

apps/server/src/dashboard/dashboard.service.ts

@@ -103,7 +103,7 @@ export class DashboardService {
     const totalCapacity = await capQb.getRawOne<{ total: string | number | null }>();
     // MySQL 的 SUM() 聚合默认以字符串返回，需显式转成 number
     const cap = Number(totalCapacity?.total ?? 0) || 0;
-    const occupancyRate = cap > 0 ? ((occupiedBeds / cap) * 100).toFixed(1) : 0;
+    const occupancyRate = cap > 0 ? ((occupiedBeds / cap) * 100).toFixed(1) : '0.0';
 
     const billStatsQb = this.billRepo
       .createQueryBuilder('b')