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

server/src/controller/electricity_data.controller.ts

@@ -1,14 +1,54 @@
-import { Controller, Post, Inject } from "@midwayjs/core";
+import { Controller, Post, Get, Query, Inject } from "@midwayjs/core";
 import { Context } from "@midwayjs/koa";
+import { InjectRepository } from "@midwayjs/sequelize";
+import { Repository } from "sequelize-typescript";
 import { IccAnalogSyncService } from "../service/icc_analog_sync.service";
+import ElectricityData from "../entity/electricity_data.entity";
 
 @Controller("/api/electricity-data")
 export class ElectricityDataController {
 	@Inject() ctx!: Context;
 	@Inject() iccAnalogSyncService!: IccAnalogSyncService;
+	@InjectRepository(ElectricityData)
+	electricityDataRepo!: Repository<ElectricityData>;
 
 	@Post("/sync") async sync() {
 		const result = await this.iccAnalogSyncService.syncFromIcc(this.ctx);
 		return { code: 200, message: "模拟量数据同步完成", data: result };
 	}
+
+	/** 查询某线路最近一次同步的模拟量快照（取最大 collect_time 的全部模拟量行） */
+	@Get("/latest") async latest(@Query("lineId") lineId?: string) {
+		const id = Number(lineId);
+		if (!id || Number.isNaN(id)) {
+			return { code: 400, message: "缺少有效的 lineId 参数" };
+		}
+		const latest = await this.electricityDataRepo.findOne({
+			where: { lineId: id },
+			order: [["collectTime", "DESC"]],
+			attributes: ["lineCode", "lineName", "imei", "customerId", "collectTime"],
+		});
+		if (!latest) {
+			return { code: 200, message: "该线路暂无模拟量数据", data: { lineId: id, hasData: false, collectTime: null, list: [] } };
+		}
+		const rows = await this.electricityDataRepo.findAll({
+			where: { lineId: id, collectTime: latest.getDataValue("collectTime") as Date },
+			order: [["analogType", "ASC"]],
+			attributes: ["analogType", "analogName", "analogUnit", "analogValue"],
+		});
+		return {
+			code: 200,
+			message: "ok",
+			data: {
+				lineId: id,
+				lineCode: latest.getDataValue("lineCode"),
+				lineName: latest.getDataValue("lineName"),
+				imei: latest.getDataValue("imei"),
+				customerId: latest.getDataValue("customerId"),
+				collectTime: latest.getDataValue("collectTime"),
+				hasData: true,
+				list: rows,
+			},
+		};
+	}
 }