fix: utiliser l'API Proxmox pour la liste des LXC + check auto au chargement

- Remplace pct list SSH (permissions aléatoires) par /api/proxmox/lxc
- Lance checkAll() automatiquement à l'arrivée sur la page

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

frontend/src/views/Updates.vue

@@ -171,6 +171,7 @@ const anyRunning = computed(() => targets.value.some(t => t.updating))
 onMounted(async () => {
   await loadTargets()
   await loadHistory()
+  checkAll()
 })
 
 onUnmounted(() => wsConnection?.close())
@@ -178,23 +179,29 @@ onUnmounted(() => wsConnection?.close())
 async function loadTargets() {
   loadingTargets.value = true
   try {
-    const res = await fetch('/api/updates/targets', {
+    const list: Target[] = [
+      { id: 'host', name: 'Proxmox Host', status: 'running', packages: null, checking: false, updating: false, showPackages: false, error: null },
+    ]
+    const res = await fetch('/api/proxmox/lxc', {
       headers: { Authorization: `Bearer ${authStore.accessToken}` },
     })
     if (res.ok) {
-      const data: any[] = await res.json() || []
-      targets.value = data.map(t => ({
-        id: t.id,
-        name: t.name,
-        status: t.status,
-        vmid: t.vmid,
+      const lxcs: any[] = await res.json() || []
+      for (const lxc of lxcs) {
+        list.push({
+          id: `lxc:${lxc.vmid}`,
+          name: lxc.name || `LXC ${lxc.vmid}`,
+          status: lxc.status,
+          vmid: lxc.vmid,
           packages: null,
           checking: false,
           updating: false,
           showPackages: false,
           error: null,
-      }))
+        })
       }
+    }
+    targets.value = list
   } finally {
     loadingTargets.value = false
   }