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/server/src/routes/webhook.ts

@@ -0,0 +1,33 @@
+import Router from '@koa/router'
+import { emitWebhook } from '../services/hermes'
+
+export const webhookRoutes = new Router()
+
+/**
+ * POST /webhook — receive callbacks from Hermes Agent
+ *
+ * Expected body:
+ * {
+ *   "event": "run.completed" | "job.completed" | ...,
+ *   "run_id": "...",
+ *   "data": { ... }
+ * }
+ *
+ * TODO: Add signature verification when Hermes supports webhook signing
+ */
+webhookRoutes.post('/webhook', async (ctx) => {
+  const payload = ctx.request.body
+
+  if (!payload || !payload.event) {
+    ctx.status = 400
+    ctx.body = { error: 'Missing event field' }
+    return
+  }
+
+  console.log(`[Webhook] Received event: ${payload.event}`)
+
+  // Emit to registered callbacks
+  emitWebhook(payload)
+
+  ctx.body = { ok: true }
+})