feat: 重构勘察业务为明细模式并新增定时任务人性化配置

- 重构勘察业务：移除SOP相关表，新增勘察明细表支持建筑/楼层/房间/照片管理
- 新增定时任务人性化频率配置，支持分钟/小时/天/周/月/自定义六种模式
- 新增频率预览接口，支持配置转换为cron表达式与执行时间预览
- 更新系统品牌名称为鑫潼智电，修改全局标题与登录页文案

server/src/entity/survey_detail.entity.ts

@@ -0,0 +1,49 @@
+import { Column, Model, Table, DataType, CreatedAt, UpdatedAt, ForeignKey, BelongsTo } from "sequelize-typescript";
+import SurveyOrder from "./survey_order.entity";
+
+@Table({
+	tableName: "survey_detail",
+	comment: "勘察工单明细表（建筑/楼层/房间 + 现场照片）",
+	timestamps: true,
+	createdAt: "created_at",
+	updatedAt: "updated_at",
+	indexes: [{ name: "idx_survey_detail_order", fields: ["survey_order_id"] }]
+})
+export default class SurveyDetail extends Model {
+	@Column({ type: DataType.BIGINT, autoIncrement: true, primaryKey: true })
+	id!: number;
+
+	@ForeignKey(() => SurveyOrder)
+	@Column({ type: DataType.BIGINT, allowNull: false, field: "survey_order_id", comment: "勘察工单ID（→ survey_order）" })
+	surveyOrderId!: number;
+
+	@Column({ type: DataType.BIGINT, field: "building_id", comment: "建筑ID（→ customer_building）" })
+	buildingId!: number;
+
+	@Column({ type: DataType.STRING(128), field: "building_name", comment: "建筑名称（冗余，客户拓扑变更后仍可读）" })
+	buildingName!: string;
+
+	@Column({ type: DataType.STRING(16), field: "floor_no", comment: "所在楼层：正数为地上、负数为地下，如 1 / -1" })
+	floorNo!: string;
+
+	@Column({ type: DataType.BIGINT, field: "room_id", comment: "房间ID（→ customer_room，可空）" })
+	roomId!: number;
+
+	@Column({ type: DataType.STRING(128), field: "room_name", comment: "房间名称（冗余，可空）" })
+	roomName!: string;
+
+	@Column({ type: DataType.TEXT, field: "photos", comment: "现场照片对象key(JSON数组字符串)" })
+	photos!: string;
+
+	@Column({ type: DataType.STRING(255), comment: "备注" })
+	remark!: string;
+
+	@BelongsTo(() => SurveyOrder, { foreignKey: "surveyOrderId", as: "surveyOrder" })
+	surveyOrder!: SurveyOrder;
+
+	@CreatedAt
+	created_at!: Date;
+
+	@UpdatedAt
+	updated_at!: Date;
+}