fix(shell): add missing Monitor import from lucide-react

💘 Generated with Crush

Assisted-by: GLM-5.1 via Crush <crush@charm.land>

web/src/components/Shell.jsx

@@ -1,5 +1,6 @@
 import { useState, useRef, useEffect, useCallback } from 'react'
 import { useI18n } from '../i18n'
+import { Monitor } from 'lucide-react'
 // === Style thème système pour xterm ===
 function getCSSVariable(varName) {
   if (typeof document === 'undefined') return null;
@@ -236,6 +237,9 @@ function connectWebSocket(term, fitAddon, initPayload, onStateChange, onFirstMes
 }
 
 export default function Shell({ api }) {
+  const MAX_TABS = 7
+  const TABS_STORAGE_KEY = 'muyue_shell_tabs'
+  const TERMINAL_BUFFER_KEY = 'muyue_terminal_buffers'
   const { t } = useI18n()
   const tabsRef = useRef({})
   const nextIdRef = useRef(1)