Feat: add VPS export functionality and import JSON feature in UI

vps-monitor/frontend/src/App.jsx

@@ -1,5 +1,5 @@
 import { useState, useEffect, useCallback } from 'react'
-import { fetchAllStatus, containerAction, addVps, deleteVps, fetchLogs, authStatus, getToken, setToken, composeUpdate, updateVps, updateAgent } from './api/client'
+import { fetchAllStatus, containerAction, addVps, deleteVps, fetchLogs, authStatus, getToken, setToken, composeUpdate, updateVps, updateAgent, exportVps } from './api/client'
 import Header        from './components/Header'
 import VpsCard       from './components/VpsCard'
 import LogsModal     from './components/LogsModal'
@@ -198,6 +198,11 @@ export default function App() {
     await refresh(true)
   }
 
+  const handleExportVps = async (vpsId) => {
+    const config = await exportVps(vpsId)
+    await navigator.clipboard.writeText(JSON.stringify(config, null, 2))
+  }
+
   // Attente vérification auth
   if (!authChecked) return null
 
@@ -305,6 +310,7 @@ export default function App() {
                 onEdit={setEditVps}
                 onStats={(vpsId, vpsName) => setStatsModal({ vpsId, vpsName })}
                 onUpdateAgent={handleUpdateAgent}
+                onExport={handleExportVps}
               />
             ))}
           </div>