fix: 修复多处边界条件问题

- rooms: parseRoomNumber 未知格式返回默认 capacity=4，防止 undefined 绕过入住容量检查
- rooms: 修复 parseInt() || undefined 导致楼层 0 被吞掉
- rooms: batchImport 中 capacity 使用 ?? 代替 ||，显式 0 不被覆盖
- occupancies: 所有 capacity 比较加 ?? 0 防守兜底，fail closed
- schedules: assertValidScheduleRange 增加 startTime > endTime 校验
- attendance: 时段重叠检查改为按 startTime 排序后再比较，消除漏检
- attendance: 移除 getScheduleOptionsForAttendance 中不可靠的 raw[index] fallback
- expenses: 个人附加费批量导入增加 assertPositiveAmount 校验
- expenses: 水电费导入增加 periodEnd >= periodStart 校验

apps/server/src/attendance/attendance.service.ts

@@ -866,9 +866,13 @@ export class AttendanceService {
       };
     }).sort((left, right) => left.sortOrder - right.sortOrder);
 
-    for (let index = 1; index < normalized.length; index += 1) {
-      const previous = normalized[index - 1];
-      const current = normalized[index];
+    // 按开始时间排序后再检查重叠，避免 sortOrder 与时间顺序不一致时漏检
+    const sortedByTime = [...normalized].sort(
+      (left, right) => this.toMinutes(left.startTime) - this.toMinutes(right.startTime),
+    );
+    for (let index = 1; index < sortedByTime.length; index += 1) {
+      const previous = sortedByTime[index - 1];
+      const current = sortedByTime[index];
       if (previous.enabled && current.enabled && this.toMinutes(current.startTime) < this.toMinutes(previous.endTime)) {
         throw new BadRequestException(`${previous.label} 和 ${current.label} 时间段不能重叠`);
       }
@@ -996,10 +1000,10 @@ export class AttendanceService {
       ]),
     );
 
-    return entities.map((schedule, index) => {
+    return entities.map((schedule) => {
       const teacher = teacherByScheduleId.get(schedule.id) ?? {
-        teacherName: raw[index]?.teacherName || null,
-        teacherUsername: raw[index]?.teacherUsername || null,
+        teacherName: null,
+        teacherUsername: null,
       };
       return { ...schedule, ...teacher };
     });