feat: 新增客户用电回路全链路功能

新增客户用电回路表及相关数据库迁移、后端服务、控制器、DTO、实体类和权限配置；新增前端API封装，同时调整路由名称以匹配新业务模块，复用现有菜单权限避免403错误。

client/src/api/customerCircuit.ts

@@ -0,0 +1,132 @@
+import request from '@/utils/request';
+
+export interface CustomerCircuitInfo {
+	id: number;
+	customerId: number;
+	buildingId: number;
+	roomId?: number | null;
+	floorNo?: string;
+	circuitCode: string;
+	circuitName: string;
+	loopSpec?: string;
+	loadType?: string;
+	ratedVoltage?: string;
+	ratedCurrent?: string;
+	ratedPower?: number | string | null;
+	status: number;
+	remark?: string;
+	sortOrder?: number;
+	createdAt?: string;
+}
+
+export interface CustomerCircuitQuery {
+	page?: number;
+	pageSize?: number;
+	keyword?: string;
+	customerId?: number;
+	buildingId?: number;
+	roomId?: number;
+	floorNo?: string;
+}
+
+export interface CustomerCircuitListResult {
+	list: CustomerCircuitInfo[];
+	total: number;
+	page: number;
+	pageSize: number;
+}
+
+export interface CustomerCircuitCreateParams {
+	circuitCode: string;
+	customerId: number;
+	buildingId: number;
+	circuitName: string;
+	roomId?: number;
+	floorNo?: string;
+	loopSpec?: string;
+	loadType?: string;
+	ratedVoltage?: string;
+	ratedCurrent?: string;
+	ratedPower?: number;
+	status?: number;
+	remark?: string;
+	sortOrder?: number;
+}
+
+export interface CustomerCircuitUpdateParams {
+	circuitCode?: string;
+	customerId?: number;
+	buildingId?: number;
+	circuitName?: string;
+	roomId?: number;
+	floorNo?: string;
+	loopSpec?: string;
+	loadType?: string;
+	ratedVoltage?: string;
+	ratedCurrent?: string;
+	ratedPower?: number;
+	status?: number;
+	remark?: string;
+	sortOrder?: number;
+}
+
+// ==================== 空间拓扑（一次返回整棵树） ====================
+export interface TopologyRoom {
+	id: number;
+	roomCode: string;
+	roomName: string;
+	buildingId: number;
+	floorNo?: string;
+	roomPurpose?: string;
+	deptId?: number;
+	circuits: CustomerCircuitInfo[];
+}
+
+export interface TopologyFloor {
+	floorNo: string;
+	rooms: TopologyRoom[];
+	circuits: CustomerCircuitInfo[];
+}
+
+export interface TopologyBuilding {
+	id: number;
+	customerId: number;
+	buildingName: string;
+	purpose?: string;
+	basicInfo?: string;
+	floorCount?: number;
+	floorDownCount?: number;
+	floors: TopologyFloor[];
+}
+
+export interface CustomerTopologyResult {
+	buildings: TopologyBuilding[];
+}
+
+// ==================== 常量 ====================
+export const CIRCUIT_LOAD_TYPES = ['照明', '动力', '空调', '插座', '电梯', '消防', '其他'];
+
+export const CIRCUIT_STATUS_OPTIONS = [
+	{ label: '正常', value: 1 },
+	{ label: '停用', value: 0 },
+];
+
+export const customerCircuitApi = {
+	getList: (params: CustomerCircuitQuery) =>
+		request.get<CustomerCircuitListResult>('/customer-circuits', { params }),
+
+	getTopology: (customerId: number) =>
+		request.get<CustomerTopologyResult>('/customer-circuits/topology', { params: { customerId } }),
+
+	getDetail: (id: number) =>
+		request.get<CustomerCircuitInfo>(`/customer-circuits/${id}`),
+
+	create: (data: CustomerCircuitCreateParams) =>
+		request.post('/customer-circuits', data),
+
+	update: (id: number, data: CustomerCircuitUpdateParams) =>
+		request.put(`/customer-circuits/${id}`, data),
+
+	delete: (id: number) =>
+		request.delete(`/customer-circuits/${id}`),
+};