feat: paginate dashboard clients and proxies via API v2 (#5354)

Move the frps dashboard Clients and Proxies views to the paginated
/api/v2/clients and /api/v2/proxies endpoints instead of fetching all
data at once, and extend server-side proxy search so the search box
keeps working under pagination.

Frontend:
- Add V2Envelope/V2Page types and getV2 HTTP helper to api/http.ts
- Add v2 paginated fetch functions to api/client.ts and api/proxy.ts
- Add ClientV2Info and ProxyV2Info types for v2 API responses
- Rewrite Clients.vue with server-side pagination, status/user search
  filtering, and ElPagination component
- Rewrite Proxies.vue with server-side pagination, type tabs, client
  dropdown filter, and a search box that passes q to the API
- Default page size 10, selectable sizes [10, 20, 50, 100]

Backend:
- Extend /api/v2/proxies q matching to also cover online proxy spec
  fields: TCP/UDP remotePort and HTTP/HTTPS/TCPMux customDomains and
  subdomain, so dashboard search no longer needs to scan every page
- Add controller_v2 tests for the new spec-field matching

web/frps/src/api/client.ts

@@ -1,10 +1,26 @@
-import { http } from './http'
-import type { ClientInfoData } from '../types/client'
+import { buildQueryString, http } from './http'
+import type { V2Page } from './http'
+import type { ClientInfoData, ClientListV2Params } from '../types/client'
 
 export const getClients = () => {
   return http.get<ClientInfoData[]>('../api/clients')
 }
 
+export const getClientsV2 = (params: ClientListV2Params = {}) => {
+  return http.getV2<V2Page<ClientInfoData>>(
+    `../api/v2/clients${buildQueryString({
+      page: params.page,
+      pageSize: params.pageSize,
+      status:
+        params.status && params.status !== 'all' ? params.status : undefined,
+      q: params.q || undefined,
+      user: params.user,
+      clientID: params.clientID || undefined,
+      runID: params.runID || undefined,
+    })}`,
+  )
+}
+
 export const getClient = (key: string) => {
   return http.get<ClientInfoData>(`../api/clients/${key}`)
 }

web/frps/src/api/http.ts

@@ -11,6 +11,21 @@ class HTTPError extends Error {
   }
 }
 
+export interface V2Envelope<T> {
+  code: number
+  msg: string
+  data: T
+}
+
+export interface V2Page<T> {
+  total: number
+  page: number
+  pageSize: number
+  items: T[]
+}
+
+type QueryParamValue = string | number | boolean | null | undefined
+
 async function request<T>(url: string, options: RequestInit = {}): Promise<T> {
   const defaultOptions: RequestInit = {
     credentials: 'include',
@@ -34,9 +49,55 @@ async function request<T>(url: string, options: RequestInit = {}): Promise<T> {
   return response.json()
 }
 
+async function requestV2<T>(
+  url: string,
+  options: RequestInit = {},
+): Promise<T> {
+  const defaultOptions: RequestInit = {
+    credentials: 'include',
+  }
+
+  const response = await fetch(url, { ...defaultOptions, ...options })
+  const envelope = (await response.json().catch(() => null)) as
+    | V2Envelope<T>
+    | null
+
+  if (!response.ok) {
+    throw new HTTPError(
+      response.status,
+      response.statusText,
+      envelope?.msg || `HTTP ${response.status}`,
+    )
+  }
+
+  if (!envelope || typeof envelope.code !== 'number') {
+    throw new Error('Invalid API v2 response')
+  }
+
+  if (envelope.code >= 400) {
+    throw new HTTPError(envelope.code, envelope.msg, envelope.msg)
+  }
+
+  return envelope.data
+}
+
+export const buildQueryString = (
+  params: Record<string, QueryParamValue>,
+): string => {
+  const query = new URLSearchParams()
+  for (const [key, value] of Object.entries(params)) {
+    if (value === null || value === undefined) continue
+    query.append(key, String(value))
+  }
+  const text = query.toString()
+  return text ? `?${text}` : ''
+}
+
 export const http = {
   get: <T>(url: string, options?: RequestInit) =>
     request<T>(url, { ...options, method: 'GET' }),
+  getV2: <T>(url: string, options?: RequestInit) =>
+    requestV2<T>(url, { ...options, method: 'GET' }),
   post: <T>(url: string, body?: any, options?: RequestInit) =>
     request<T>(url, {
       ...options,

web/frps/src/api/proxy.ts

@@ -1,7 +1,10 @@
-import { http } from './http'
+import { buildQueryString, http } from './http'
+import type { V2Page } from './http'
 import type {
   GetProxyResponse,
+  ProxyListV2Params,
   ProxyStatsInfo,
+  ProxyV2Info,
   TrafficResponse,
 } from '../types/proxy'
 
@@ -9,6 +12,40 @@ export const getProxiesByType = (type: string) => {
   return http.get<GetProxyResponse>(`../api/proxy/${type}`)
 }
 
+export const getProxiesV2 = async (params: ProxyListV2Params = {}) => {
+  const page = await http.getV2<V2Page<ProxyV2Info>>(
+    `../api/v2/proxies${buildQueryString({
+      page: params.page,
+      pageSize: params.pageSize,
+      status:
+        params.status && params.status !== 'all' ? params.status : undefined,
+      q: params.q || undefined,
+      type: params.type || undefined,
+      user: params.user,
+      clientID: params.clientID || undefined,
+    })}`,
+  )
+
+  return {
+    ...page,
+    items: page.items.map(toLegacyProxyStats),
+  }
+}
+
+const toLegacyProxyStats = (proxy: ProxyV2Info): ProxyStatsInfo => ({
+  name: proxy.name,
+  type: proxy.type,
+  conf: proxy.spec,
+  user: proxy.user,
+  clientID: proxy.clientID,
+  todayTrafficIn: proxy.status.todayTrafficIn,
+  todayTrafficOut: proxy.status.todayTrafficOut,
+  curConns: proxy.status.curConns,
+  lastStartTime: proxy.status.lastStartTime,
+  lastCloseTime: proxy.status.lastCloseTime,
+  status: proxy.status.phase,
+})
+
 export const getProxy = (type: string, name: string) => {
   return http.get<ProxyStatsInfo>(`../api/proxy/${type}/${name}`)
 }