refactor: rename module to pipely and migrate web UI to MUI

- Rename Go module from onixbyte.com/message-converter-manifest to onixbyte.com/pipely
- Replace shadcn UI with Material UI components across all pages
- Add axios-based API client in shared/web-client with credentials management
- Organise API calls into feature modules: auth, devices, deployments, artefacts, users
- Add .env.example with VITE_API_BASE_URL pointing to pipely.onixbyte.com
- Fix deprecated FormEvent → MouseEvent in dialog submit handlers

web/src/api/devices/index.ts

@@ -0,0 +1,41 @@
+import WebClient from "@/shared/web-client"
+
+export interface Device {
+  id: string
+  deviceId: string
+  status: "online" | "offline" | "upgrading"
+  lastHeartbeat: string
+  currentVersion?: string
+  targetVersion?: string
+  groupId?: string
+  createdAt: string
+  updatedAt: string
+}
+
+export interface DevicesResponse {
+  data: Device[]
+  total: number
+  page: number
+  pageSize: number
+}
+
+export interface DevicesQuery {
+  page?: number
+  pageSize?: number
+  status?: string
+  groupId?: string
+  search?: string
+}
+
+export async function getDevices(query?: DevicesQuery): Promise<DevicesResponse> {
+  const params = new URLSearchParams()
+  if (query?.page) params.append("page", query.page.toString())
+  if (query?.pageSize) params.append("pageSize", query.pageSize.toString())
+  if (query?.status) params.append("status", query.status)
+  if (query?.groupId) params.append("groupId", query.groupId)
+  if (query?.search) params.append("search", query.search)
+
+  const queryString = params.toString()
+  const { data } = await WebClient.get<DevicesResponse>(`/devices${queryString ? `?${queryString}` : ""}`)
+  return data
+}