refactor: resolve remaining field audit issues

apps/server/src/entities/room.entity.ts

@@ -1,4 +1,12 @@
-import { Entity, PrimaryGeneratedColumn, Column, CreateDateColumn, OneToMany, ManyToOne, JoinColumn } from 'typeorm';
+import {
+  Entity,
+  PrimaryGeneratedColumn,
+  Column,
+  CreateDateColumn,
+  OneToMany,
+  ManyToOne,
+  JoinColumn,
+} from 'typeorm';
 import { Occupancy } from './occupancy.entity';
 import { RoomExpense } from './room-expense.entity';
 
@@ -26,7 +34,7 @@ export class Room {
   roomType: string;
 
   @Column({ length: 10, nullable: true })
-  gender: string;
+  gender: '男' | '女' | null;
 
   @Column({ name: 'rental_category', length: 10, default: 'short' })
   rentalCategory: string;
@@ -42,5 +50,4 @@ export class Room {
 
   @OneToMany(() => RoomExpense, (e) => e.room)
   roomExpenses: RoomExpense[];
-
 }