feat: add Koa2 BFF server, CLI management, sessions CLI integration, and logs page

- Add Koa2 BFF layer for API proxy, file upload, session management
- Auto-check and enable api_server in ~/.hermes/config.yaml on startup
- Integrate sessions with Hermes CLI (list, get, delete)
- Add Logs page with level filtering, log file selection, and search
- Add CLI commands: start/stop/restart/status for daemon management
- Unify package.json for frontend and server dependencies
- Default port changed to 8648

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

src/views/ChatView.vue

@@ -2,11 +2,14 @@
 import { onMounted } from 'vue'
 import ChatPanel from '@/components/chat/ChatPanel.vue'
 import { useAppStore } from '@/stores/app'
+import { useChatStore } from '@/stores/chat'
 
 const appStore = useAppStore()
+const chatStore = useChatStore()
 
 onMounted(() => {
   appStore.loadModels()
+  chatStore.loadSessions()
 })
 </script>