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

vps-monitor/frontend/src/components/VpsCard.jsx

@@ -1,4 +1,4 @@
-import { Server, Wifi, WifiOff, Trash2, ChevronDown, ChevronUp, RefreshCw, Cpu, MemoryStick, ArrowUp, ArrowDown, Pencil, BarChart2, CloudDownload } from 'lucide-react'
+import { Server, Wifi, WifiOff, Trash2, ChevronDown, ChevronUp, RefreshCw, Cpu, MemoryStick, ArrowUp, ArrowDown, Pencil, BarChart2, CloudDownload, Copy, Check } from 'lucide-react'
 import { useState } from 'react'
 import ContainerRow from './ContainerRow'
 import { tagColor } from './TagInput'
@@ -14,10 +14,17 @@ function formatRam(bytes) {
   return `${(bytes / 1024 ** 3).toFixed(1)} GB`
 }
 
-export default function VpsCard({ vps, onAction, onLogs, onDelete, onUpdate, onEdit, onStats, onUpdateAgent }) {
+export default function VpsCard({ vps, onAction, onLogs, onDelete, onUpdate, onEdit, onStats, onUpdateAgent, onExport }) {
   const [collapsed, setCollapsed] = useState(false)
   const [updatingProject, setUpdatingProject] = useState(null)
   const [updatingAgent, setUpdatingAgent] = useState(false)
+  const [exported, setExported] = useState(false)
+
+  const handleExport = async () => {
+    await onExport(vps.id)
+    setExported(true)
+    setTimeout(() => setExported(false), 2000)
+  }
 
   const running = vps.containers.filter(c => c.status === 'running').length
   const total   = vps.containers.length
@@ -78,6 +85,14 @@ export default function VpsCard({ vps, onAction, onLogs, onDelete, onUpdate, onE
             </button>
           )}
 
+          <button
+            onClick={handleExport}
+            className={`p-1.5 rounded hover:bg-gray-800 transition-colors ${exported ? 'text-emerald-400' : 'text-gray-500 hover:text-gray-300'}`}
+            title={exported ? 'Config copiée !' : 'Exporter la config (copier JSON)'}
+          >
+            {exported ? <Check size={14} /> : <Copy size={14} />}
+          </button>
+
           <button
             onClick={() => onEdit(vps)}
             className="p-1.5 rounded hover:bg-gray-800 text-gray-500 hover:text-gray-300 transition-colors"