feat(app): 添加平台信息工具并将其集成到应用初始化中

- 创建 utils/platform.ts 以提取并规范化设备/操作系统信息
- 将 globalData 中的普通 `system` 字符串替换为结构化的 `platformInfo` 对象
- 推导硬件/软件详情、设备类别和平台标志
- 更新 TypeScript 类型定义以支持新的平台数据类型

miniprogram/utils/platform.ts

@@ -0,0 +1,81 @@
+const MOBILE_CLIENT_PLATFORMS: ClientPlatformType[] = ['ios', 'android', 'ohos']
+const DESKTOP_CLIENT_PLATFORMS: ClientPlatformType[] = ['windows', 'mac', 'ohos_pc']
+
+function normalizeClientPlatform(platform: string): ClientPlatformType {
+  switch (platform.toLowerCase()) {
+    case 'ios':
+    case 'android':
+    case 'ohos':
+    case 'ohos_pc':
+    case 'windows':
+    case 'mac':
+    case 'devtools':
+      return platform.toLowerCase() as ClientPlatformType
+    default:
+      return 'unknown'
+  }
+}
+
+function resolveOperatingSystem(platform: ClientPlatformType): OperatingSystemType {
+  switch (platform) {
+    case 'ios':
+      return 'ios'
+    case 'android':
+      return 'android'
+    case 'ohos':
+    case 'ohos_pc':
+      return 'harmonyos'
+    case 'windows':
+      return 'windows'
+    case 'mac':
+      return 'macos'
+    case 'devtools':
+      return 'devtools'
+    default:
+      return 'unknown'
+  }
+}
+
+function resolveDeviceClass(platform: ClientPlatformType): HardwareDeviceClassType {
+  if (MOBILE_CLIENT_PLATFORMS.includes(platform)) {
+    return 'mobile'
+  }
+
+  if (DESKTOP_CLIENT_PLATFORMS.includes(platform)) {
+    return 'desktop'
+  }
+
+  return platform === 'devtools' ? 'devtools' : 'unknown'
+}
+
+export function getPlatformInfo(): PlatformInfoType {
+  const deviceInfo = wx.getDeviceInfo()
+  const appBaseInfo = wx.getAppBaseInfo()
+  const rawClientPlatform = deviceInfo.platform || ''
+  const clientPlatform = normalizeClientPlatform(rawClientPlatform)
+  const deviceClass = resolveDeviceClass(clientPlatform)
+
+  return {
+    hardware: {
+      deviceClass,
+      brand: deviceInfo.brand || '',
+      model: deviceInfo.model || '',
+      abi: deviceInfo.abi || '',
+      deviceAbi: deviceInfo.deviceAbi || '',
+      cpuType: deviceInfo.cpuType || '',
+      memorySize: deviceInfo.memorySize || '',
+    },
+    software: {
+      clientPlatform,
+      rawClientPlatform,
+      operatingSystem: resolveOperatingSystem(clientPlatform),
+      system: deviceInfo.system || '',
+      wechatVersion: appBaseInfo.version || '',
+      baseLibraryVersion: appBaseInfo.SDKVersion || '',
+      hostAppId: appBaseInfo.host?.appId || '',
+    },
+    isMobile: deviceClass === 'mobile',
+    isDesktop: deviceClass === 'desktop',
+    isDevtools: deviceClass === 'devtools',
+  }
+}