refactor(device): 优化设备详情字段与心跳数据加载逻辑

- 新增设备最后心跳查询接口及类型定义
- 设备在线状态字段统一更名为 online，移除重复字段
- 设备详情首次加载时从心跳接口获取最后上线时间
- WebSocket 推送在线状态时同步更新屏幕状态和最后心跳时间
- 编辑设备弹窗精简为仅可修改昵称，其余字段改为只读展示

src/views/devices/sn/config/edit.ts

@@ -5,16 +5,6 @@ import type { IModalConfig } from "@/components/DeviceSn/types";
 import { DeviceEnum } from "@/enums/settings";
 import { useAppStore } from "@/stores";
 
-/** 只读输入框配置（展示常用参数，不可编辑） */
-const readonlyInput = (placeholder = "系统自动填充") => ({
-  type: "input" as const,
-  attrs: {
-    placeholder,
-    readonly: true,
-    disabled: true,
-  },
-});
-
 const modalConfig: IModalConfig<DeviceForm> = {
   permPrefix: "sys:device",
   component: "drawer",
@@ -23,11 +13,10 @@ const modalConfig: IModalConfig<DeviceForm> = {
     size: useAppStore().device === DeviceEnum.MOBILE ? "80%" : 500,
   },
   pk: "id",
-  // 编辑只回传可修改字段，其余保持不变
+  // 编辑只回传可修改字段（仅设备昵称）
   beforeSubmit(data) {
     return {
       id: data.id,
-      serialno: data.serialno,
       snName: data.snName,
       status: data.status,
     } as DeviceForm;
@@ -43,14 +32,9 @@ const modalConfig: IModalConfig<DeviceForm> = {
       attrs: {
         placeholder: "设备序列号",
         readonly: true,
+        disabled: true,
       },
     },
-    {
-      label: "设备型号",
-      prop: "snModel",
-      rules: [{ required: true, message: "设备型号不能为空", trigger: "blur" }],
-      ...readonlyInput("设备型号"),
-    },
     {
       label: "设备昵称",
       prop: "snName",
@@ -61,43 +45,6 @@ const modalConfig: IModalConfig<DeviceForm> = {
         maxlength: 50,
       },
     },
-    {
-      label: "手机号码",
-      prop: "snMobile",
-      rules: [
-        {
-          pattern: /^1[3|4|5|6|7|8|9][0-9]\d{8}$/,
-          message: "请输入正确的手机号码",
-          trigger: "blur",
-        },
-      ],
-      ...readonlyInput("绑定手机号"),
-    },
-    {
-      label: "IMEI",
-      prop: "snImei",
-      ...readonlyInput("设备IMEI"),
-    },
-    {
-      label: "设备类型",
-      prop: "deviceType",
-      ...readonlyInput("设备类型"),
-    },
-    {
-      label: "来源",
-      prop: "source",
-      ...readonlyInput("设备来源"),
-    },
-    {
-      label: "激活时间",
-      prop: "activationTime",
-      ...readonlyInput("激活时间"),
-    },
-    {
-      label: "最后上线",
-      prop: "lastOnline",
-      ...readonlyInput("最后上线时间"),
-    },
     {
       label: "状态",
       prop: "status",