feat(line): 智电改造线路台账新增「线路数据」弹窗展示最近一次模拟量快照 - 后端新增GET /api/electricity-data/latest（按lineId取最大collect_time的全部模拟量行，RBAC device:list）；前端electricityDataApi.getLatestByLine与ElectricityLatestSnapshot类型；台账页表格新增固定右侧「操作」列与「线路数据」按钮，点击弹出720px弹窗显示线路信息（线路/编码/采集时间）及模拟量表格（模拟量名称/类型/数值/单位），无数据时显示空态提示

Co-Authored-By: Claude Sonnet 4.6 noreply@anthropic.com

client/src/api/device.ts

@@ -272,4 +272,29 @@ export const electricGatewayApi = {
 
 	sync: () =>
 		request.post<IccGatewaySyncResult>('/electric-gateways/sync'),
+};
+
+// ==================== 线路用电（ICC 模拟量） ====================
+
+export interface ElectricityAnalogRow {
+	analogType?: string;
+	analogName?: string;
+	analogUnit?: string;
+	analogValue?: number | string | null;
+}
+
+export interface ElectricityLatestSnapshot {
+	lineId: number;
+	lineCode?: string;
+	lineName?: string;
+	imei?: string;
+	customerId?: number;
+	collectTime?: string | null;
+	hasData: boolean;
+	list: ElectricityAnalogRow[];
+}
+
+export const electricityDataApi = {
+	getLatestByLine: (lineId: number) =>
+		request.get<ElectricityLatestSnapshot>('/electricity-data/latest', { params: { lineId } }),
 };