refactor: restructure project for multi-agent extensibility

- Migrate source to packages/client and packages/server directories
- Namespace all Hermes-specific code under hermes/ subdirectories
  (api/hermes/, components/hermes/, views/hermes/, stores/hermes/)
- Add hermes.* route names and /hermes/* path prefixes
- Upgrade @koa/router to v15, adapt path-to-regexp v8 syntax
- Fix proxy path rewriting: /api/hermes/v1/* → /v1/*, /api/hermes/* → /api/*
- Fix frontend API paths to match backend /api/hermes/* routes
- Fix WebSocket terminal path to /api/hermes/terminal
- Add proxyMiddleware for reliable unmatched route proxying
- Add profiles route module and hermes-cli profile commands
- Update CLAUDE.md development guide with new architecture
- Add Chinese README (README_zh.md)
- Add Web Terminal feature to README

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

packages/client/src/api/hermes/system.ts

@@ -0,0 +1,79 @@
+import { request } from '../client'
+
+export interface HealthResponse {
+  status: string
+  version?: string
+}
+
+// Config-based model types
+export interface ModelInfo {
+  id: string
+  label: string
+}
+
+export interface ModelGroup {
+  provider: string
+  models: ModelInfo[]
+}
+
+export interface ConfigModelsResponse {
+  default: string
+  groups: ModelGroup[]
+}
+
+export interface AvailableModelGroup {
+  provider: string   // credential pool key (e.g. "zai", "custom:subrouter.ai")
+  label: string      // display name (e.g. "zai", "subrouter.ai")
+  base_url: string
+  models: string[]
+}
+
+export interface AvailableModelsResponse {
+  default: string
+  groups: AvailableModelGroup[]
+}
+
+export interface CustomProvider {
+  name: string
+  base_url: string
+  api_key: string
+  model: string
+  providerKey?: string | null
+}
+
+export async function checkHealth(): Promise<HealthResponse> {
+  return request<HealthResponse>('/health')
+}
+
+export async function fetchConfigModels(): Promise<ConfigModelsResponse> {
+  return request<ConfigModelsResponse>('/api/hermes/config/models')
+}
+
+export async function fetchAvailableModels(): Promise<AvailableModelsResponse> {
+  return request<AvailableModelsResponse>('/api/hermes/available-models')
+}
+
+export async function updateDefaultModel(data: {
+  default: string
+  provider?: string
+  base_url?: string
+  api_key?: string
+}): Promise<void> {
+  await request('/api/hermes/config/model', {
+    method: 'PUT',
+    body: JSON.stringify(data),
+  })
+}
+
+export async function addCustomProvider(data: CustomProvider): Promise<void> {
+  await request('/api/hermes/config/providers', {
+    method: 'POST',
+    body: JSON.stringify(data),
+  })
+}
+
+export async function removeCustomProvider(name: string): Promise<void> {
+  await request(`/api/hermes/config/providers/${encodeURIComponent(name)}`, {
+    method: 'DELETE',
+  })
+}