feat: update monitor, terminal, and SFTP interaction flow

frontend/src/components/TerminalWidget.vue

@@ -3,7 +3,7 @@ import { nextTick, ref, onMounted, onUnmounted, watch } from 'vue'
 import { Terminal } from 'xterm'
 import { FitAddon } from '@xterm/addon-fit'
 import { useAuthStore } from '../stores/auth'
-import axios from 'axios'
+import client from '../api/client'
 import { Activity, Cpu, HardDrive, MemoryStick, Clock, ChevronUp, ChevronDown } from 'lucide-vue-next'
 import 'xterm/css/xterm.css'
 
@@ -74,7 +74,7 @@ async function fetchMonitorData() {
   if (!props.active || status.value !== 'connected') return
   monitorLoading.value = true
   try {
-    const res = await axios.get(`/api/monitor/${props.connectionId}`)
+    const res = await client.get(`/monitor/${props.connectionId}`)
     monitorData.value = res.data
   } catch {
     // 静默失败，不影响终端使用