fix(api): 修正看板和历史统计口径

src/server/battery/mysql.ts

@@ -15,8 +15,6 @@ import { env } from '@/env'
 
 const historyLimit = 500
 const predictionHistoryLimit = 10
-const dashboardLatestLimit = 100
-
 type BatteryInfoMysqlRow = RowDataPacket & BatteryInfoSourceRow
 type CountMysqlRow = RowDataPacket & {
   total: number
@@ -314,16 +312,19 @@ export async function getLatestBatteryPage(input: LatestBatteryPageInput): Promi
   }
 }
 
-export async function getLatestBatteryPerDevice(limit = dashboardLatestLimit): Promise<BatteryInfo[]> {
+export async function getLatestBatteryPerDevice(limit?: number): Promise<BatteryInfo[]> {
+  const appliedLimit = typeof limit === 'number' && limit > 0 ? limit : undefined
+  const limitSql = appliedLimit ? '\n    LIMIT :limit' : ''
+  const queryParams = appliedLimit ? { limit: appliedLimit } : {}
+
   const [rows] = await getBatteryPool().query<BatteryInfoMysqlRow[]>(
     `
     SELECT ${sourceColumns}
     FROM ls_battery_info AS current_record
     WHERE ${latestRecordPredicate}
-    ORDER BY current_record.create_time DESC, current_record.id DESC
-    LIMIT :limit
+    ORDER BY current_record.create_time DESC, current_record.id DESC${limitSql}
   `,
-    { limit: Math.min(Math.max(limit, 1), dashboardLatestLimit) },
+    queryParams,
   )
 
   return rows.map(toBatteryInfo)