fix: resolve homepage 404 and add mock data for user portrait

Add landing page, fix type errors, mark dynamic API route, and refactor user portrait page.

Co-authored-by: null <4804959+fnvtk@users.noreply.github.com>

types/device.ts

@@ -0,0 +1,58 @@
+export type DeviceStatus = "online" | "offline" | "unknown"
+
+export interface Device {
+  id: string
+  name: string
+  wechatId?: string
+  group?: string
+  tags?: string[]
+  status: DeviceStatus
+  lastSeen?: string
+}
+
+export interface CreateDeviceParams {
+  name: string
+  wechatId?: string
+  group?: string
+  tags?: string[]
+}
+
+export interface UpdateDeviceParams extends Partial<CreateDeviceParams> {
+  id: string
+}
+
+export interface QueryDeviceParams {
+  keyword?: string
+  tags?: string[]
+  dateRange?: { start: string; end: string }
+  page?: number
+  pageSize?: number
+}
+
+export interface DeviceStats {
+  id: string
+  tasksToday: number
+  uptimePercent: number
+}
+
+export interface DeviceTaskRecord {
+  id: string
+  deviceId: string
+  type: string
+  status: "success" | "failed"
+  time: string
+}
+
+export interface PaginatedResponse<T> {
+  items: T[]
+  total: number
+  page: number
+  pageSize: number
+  totalPages: number
+}
+
+export interface ApiResponse<T> {
+  code: number
+  message: string
+  data: T | null
+}