diff --git a/.github/workflows/test-guest-backups.yml b/.github/workflows/test-guest-backups.yml
new file mode 100644
index 00000000..60da0353
--- /dev/null
+++ b/.github/workflows/test-guest-backups.yml
@@ -0,0 +1,54 @@
+name: Guest backup archives
+
+on:
+  pull_request:
+    paths:
+      - '.github/workflows/test-guest-backups.yml'
+      - 'AppImage/scripts/guest_backup_archives.py'
+      - 'AppImage/scripts/flask_server.py'
+      - 'AppImage/scripts/jwt_middleware.py'
+      - 'AppImage/scripts/build_appimage.sh'
+      - 'AppImage/components/guest-backup-list.tsx'
+      - 'AppImage/components/virtual-machines.tsx'
+      - 'AppImage/lib/guest-backup-archives.ts'
+      - 'AppImage/messages/**'
+      - 'tests/test_guest_backup_archives.*'
+  push:
+    branches: [main, develop]
+    paths:
+      - 'AppImage/scripts/guest_backup_archives.py'
+      - 'AppImage/scripts/flask_server.py'
+      - 'AppImage/scripts/jwt_middleware.py'
+      - 'AppImage/components/guest-backup-list.tsx'
+      - 'AppImage/components/virtual-machines.tsx'
+      - 'AppImage/lib/guest-backup-archives.ts'
+      - 'tests/test_guest_backup_archives.*'
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+jobs:
+  guest-backups:
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          persist-credentials: false
+      - uses: actions/setup-python@v5
+        with:
+          python-version: '3.11'
+      - uses: actions/setup-node@v6
+        with:
+          node-version: '22.14.0'
+      - name: Install fixture dependencies
+        run: |
+          python -m pip install 'Flask==3.1.2'
+          npm ci --prefix .github/ci/offline-node --ignore-scripts --no-audit --no-fund
+      - name: Test native deletion, protection, authorization and cache invalidation
+        run: python -B -m unittest discover -s tests -p test_guest_backup_archives.py -v
+      - name: Test frontend deletion and completion handling
+        env:
+          NODE_PATH: ${{ github.workspace }}/.github/ci/offline-node/node_modules
+        run: node tests/test_guest_backup_archives.cjs
diff --git a/AppImage/components/guest-backup-list.tsx b/AppImage/components/guest-backup-list.tsx
new file mode 100644
index 00000000..3f6878f7
--- /dev/null
+++ b/AppImage/components/guest-backup-list.tsx
@@ -0,0 +1,135 @@
+"use client"
+
+import { useEffect, useRef, useState } from "react"
+import { Archive, Clock, Loader2, LockKeyhole, RefreshCw, Trash2 } from "lucide-react"
+import { Badge } from "./ui/badge"
+import { Button } from "./ui/button"
+import { Checkbox } from "./ui/checkbox"
+import { Dialog, DialogContent, DialogDescription, DialogFooter, DialogHeader, DialogTitle } from "./ui/dialog"
+import { useT } from "@/lib/i18n/provider"
+import { deleteGuestBackups, type GuestBackup } from "../lib/guest-backup-archives"
+
+export function GuestBackupList({ vmid, backups, loading, onRefresh, storageColor }: {
+  vmid: number
+  backups: GuestBackup[]
+  loading: boolean
+  onRefresh: () => Promise<void>
+  storageColor?: (storage: string) => { bg: string; text: string; border: string }
+}) {
+  const t = useT()
+  const [selected, setSelected] = useState<string[]>([])
+  const [confirm, setConfirm] = useState(false)
+  const [busy, setBusy] = useState(false)
+  const [refreshing, setRefreshing] = useState(false)
+  const [message, setMessage] = useState("")
+  const [error, setError] = useState("")
+  const mounted = useRef(true)
+  useEffect(() => {
+    mounted.current = true
+    return () => { mounted.current = false }
+  }, [])
+  // A fresh list can remove a selection or reveal a newly protected archive.
+  useEffect(() => {
+    setSelected(previous => previous.filter(volid => backups.some(backup => backup.volid === volid && !backup.protected)))
+  }, [backups])
+
+  const chosen = backups.filter(backup => selected.includes(backup.volid) && !backup.protected)
+  const selectable = backups.filter(backup => !backup.protected)
+  const disabled = loading || busy || refreshing
+  const storageClass = (storage: string) => {
+    const color = storageColor?.(storage)
+    return color ? `${color.bg} ${color.text} ${color.border}` : ""
+  }
+
+  async function refresh() {
+    setRefreshing(true)
+    setError("")
+    try { await onRefresh() } catch { if (mounted.current) setError(t("vmLxc.backups.refreshFailed")) }
+    finally { if (mounted.current) setRefreshing(false) }
+  }
+
+  async function remove() {
+    if (!chosen.length || busy) return
+    setBusy(true)
+    setError("")
+    setMessage("")
+    try {
+      const results = await deleteGuestBackups(vmid, chosen)
+      if (!mounted.current) return
+      const deleted = results.filter(result => result.status === "deleted").length
+      const unconfirmed = results.length - deleted
+      setMessage(t("vmLxc.backups.deletedCount", { count: deleted }))
+      if (unconfirmed) setError(t("vmLxc.backups.unconfirmedCount", { count: unconfirmed }))
+      setSelected([])
+    } catch (error) {
+      if (mounted.current) setError(`${t("vmLxc.backups.deleteFailed")} ${error instanceof Error ? error.message : ""}`)
+    } finally {
+      // A timeout can hide a successful native task. Always bypass both caches.
+      try { await onRefresh() } catch { if (mounted.current) setError(t("vmLxc.backups.refreshFailed")) }
+      if (mounted.current) { setBusy(false); setConfirm(false) }
+    }
+  }
+
+  return <>
+    <div className="flex items-center justify-between gap-2 mb-3 shrink-0 flex-wrap">
+      <div className="flex items-center gap-2">
+        <span className="text-xs text-muted-foreground">{t("vmLxc.backups.available")}</span>
+        <Badge variant="secondary" className="text-xs h-5">{backups.length}</Badge>
+      </div>
+      <div className="flex items-center gap-2">
+        <Button size="sm" variant="ghost" className="h-7 text-xs gap-1" disabled={disabled} onClick={refresh}>
+          <RefreshCw className={`h-3 w-3 ${refreshing ? "animate-spin" : ""}`} />{t("vmLxc.backups.refresh")}
+        </Button>
+        <Button size="sm" variant="destructive" className="h-7 text-xs gap-1" disabled={disabled || !chosen.length} onClick={() => setConfirm(true)}>
+          {busy ? <Loader2 className="h-3 w-3 animate-spin" /> : <Trash2 className="h-3 w-3" />}
+          {t("vmLxc.backups.deleteSelected", { count: chosen.length })}
+        </Button>
+      </div>
+    </div>
+    {message && <p role="status" className="text-xs text-muted-foreground mb-2">{message}</p>}
+    {error && <p role="alert" className="text-xs text-destructive mb-2 break-words">{error}</p>}
+    {loading ? <div className="flex-1 flex items-center justify-center text-muted-foreground min-h-0">
+      <Loader2 className="h-4 w-4 animate-spin mr-2" /><span className="text-sm">{t("vmLxc.backups.loading")}</span>
+    </div> : backups.length === 0 ? <div className="flex-1 flex flex-col items-center justify-center text-muted-foreground min-h-0">
+      <Archive className="h-12 w-12 mb-3 opacity-30" /><span className="text-sm">{t("vmLxc.backups.empty")}</span>
+      <span className="text-xs mt-1">{t("vmLxc.backups.emptyHint")}</span>
+    </div> : <>
+      <label className="flex items-center gap-2 mb-3 text-xs text-muted-foreground">
+        <Checkbox checked={selectable.length > 0 && chosen.length === Math.min(20, selectable.length)} disabled={disabled || !selectable.length}
+          onCheckedChange={checked => setSelected(checked ? selectable.slice(0, 20).map(backup => backup.volid) : [])} />
+        {t("vmLxc.backups.selectHint")}
+      </label>
+      <div className="space-y-2 flex-1 overflow-y-auto min-h-0 pr-1 -mr-1">
+        {backups.map(backup => <label key={backup.volid} className="flex items-center gap-2 p-3 rounded-lg bg-muted/30 hover:bg-muted/50 transition-colors">
+          <Checkbox aria-label={`${t("vmLxc.backups.selectBackup")} ${backup.date} ${backup.storage}`} checked={selected.includes(backup.volid)}
+            disabled={disabled || !!backup.protected || (chosen.length >= 20 && !selected.includes(backup.volid))}
+            onCheckedChange={checked => setSelected(previous => checked ? [...previous, backup.volid] : previous.filter(id => id !== backup.volid))} />
+          <div className="w-2 h-2 rounded-full bg-green-500 shrink-0" />
+          <Clock className="h-4 w-4 text-muted-foreground shrink-0" />
+          <span className="text-sm min-w-0 truncate" title={backup.volid}>{backup.date}</span>
+          {backup.protected && <Badge variant="secondary" className="gap-1 text-xs"><LockKeyhole className="h-3 w-3" />{t("vmLxc.backups.protected")}</Badge>}
+          <Badge variant="outline" className={`text-xs ml-auto shrink-0 ${storageClass(backup.storage)}`}>{backup.storage}</Badge>
+          <Badge variant="outline" className="font-mono shrink-0">{backup.size_human}</Badge>
+        </label>)}
+      </div>
+    </>}
+    <Dialog open={confirm} onOpenChange={value => { if (!busy) setConfirm(value) }}>
+      <DialogContent onEscapeKeyDown={event => { if (busy) event.preventDefault() }} onPointerDownOutside={event => { if (busy) event.preventDefault() }}>
+        <DialogHeader>
+          <DialogTitle>{t("vmLxc.backups.confirmTitle", { count: chosen.length })}</DialogTitle>
+          <DialogDescription>{t("vmLxc.backups.confirmDescription", { vmid })}</DialogDescription>
+        </DialogHeader>
+        <ul className="max-h-48 overflow-auto text-xs space-y-2 break-all">
+          {chosen.map(backup => <li key={backup.volid}>{backup.volid}</li>)}
+        </ul>
+        {busy && <p role="status" className="text-sm text-muted-foreground">{t("vmLxc.backups.deleting")}</p>}
+        <DialogFooter>
+          <Button variant="outline" disabled={busy} onClick={() => setConfirm(false)}>{t("vmLxc.backups.cancel")}</Button>
+          <Button variant="destructive" disabled={busy || !chosen.length} onClick={remove}>
+            {busy && <Loader2 className="h-4 w-4 animate-spin mr-2" />}{t("vmLxc.backups.confirmDelete")}
+          </Button>
+        </DialogFooter>
+      </DialogContent>
+    </Dialog>
+  </>
+}
diff --git a/AppImage/components/virtual-machines.tsx b/AppImage/components/virtual-machines.tsx
index 901655d4..a538627a 100644
--- a/AppImage/components/virtual-machines.tsx
+++ b/AppImage/components/virtual-machines.tsx
@@ -23,6 +23,8 @@ import { MetricsView } from "./metrics-dialog"
 import { LxcTerminalModal } from "./lxc-terminal-modal"
 import { ScriptTerminalModal } from "./script-terminal-modal"
 import { LxcAppPanel, ThemeAwareLogo, ociImageLabel } from "./lxc-app-panel"
+import { GuestBackupList } from "./guest-backup-list"
+import type { GuestBackup } from "../lib/guest-backup-archives"
 import { OciConsoleLogPanel } from "./oci-console-log-panel"
 import { AppUpdaterEditor, type AppUpdateMethod } from "./app-updater-editor"
 import { formatStorage } from "../lib/utils"
@@ -399,16 +401,7 @@ interface BackupStorage {
   avail_human?: string
 }
 
-interface VMBackup {
-  volid: string
-  storage: string
-  type: string
-  size: number
-  size_human: string
-  timestamp: number
-  date: string
-  notes?: string
-}
+type VMBackup = GuestBackup
 
 // Sprint 13.29: shape returned by /api/lxc/<vmid>/mount-points. Lives
 // next to VMBackup since both are LXC-modal data structures.
@@ -1615,7 +1608,7 @@ export function VirtualMachines() {
     }
   }
 
-  const fetchVmBackups = async (vmid: number) => {
+  const fetchVmBackups = async (vmid: number, force = false) => {
     // Stale-while-revalidate with a 6-hour freshness gate.
     //
     // 1. If we already have backups (bulk hydration or a previous
@@ -1632,15 +1625,16 @@ export function VirtualMachines() {
     // 3. Loading spinner only on the true first load.
     const GATE_MS = 6 * 60 * 60 * 1000
     const seed = vmModalCacheRef.current.backups.get(vmid)
-    const isStale = !seed || (Date.now() - seed.fetchedAt) > GATE_MS
+    const isStale = force || !seed || (Date.now() - seed.fetchedAt) > GATE_MS
     if (!seed) setLoadingBackups(true)
     try {
       const url = isStale
         ? `/api/vms/${vmid}/backups?fresh=1`
         : `/api/vms/${vmid}/backups`
-      const response = await fetchApi<{ backups?: VMBackup[] }>(url)
+      const response = await fetchApi<{ backups?: VMBackup[]; error?: string }>(url)
+      if (response.error || !Array.isArray(response.backups)) throw new Error(response.error || "Backup inventory unavailable")
       if (response.backups) {
-        setVmBackups(response.backups)
+        if (selectedVMRef.current?.vmid === vmid) setVmBackups(response.backups)
         vmModalCacheRef.current.backups.set(vmid, { backups: response.backups, fetchedAt: Date.now() })
       }
     } catch (error) {
@@ -1648,9 +1642,10 @@ export function VirtualMachines() {
       // Only clear the visible list if we had nothing to show
       // in the first place — a transient network hiccup must not
       // wipe the stale-but-useful view the user is looking at.
-      if (!seed) setVmBackups([])
+      if (!seed && selectedVMRef.current?.vmid === vmid) setVmBackups([])
+      if (force) throw error
     } finally {
-      if (!seed) setLoadingBackups(false)
+      if (!seed && selectedVMRef.current?.vmid === vmid) setLoadingBackups(false)
     }
   }
 
@@ -7460,7 +7455,7 @@ const handleDownloadLogs = async (vmid: number, vmName: string) => {
                 )}
 
                 {/* Backups Tab */}
-                {activeModalTab === "backups" && (
+                {activeModalTab === "backups" && selectedVM && (
                   /* Backups tab layout: the Card fills the whole tab
                      body so the backup list can scroll inside its
                      bordered card instead of leaving empty space
@@ -7495,48 +7490,17 @@ const handleDownloadLogs = async (vmid: number, vmName: string) => {
                         {/* Divider */}
                         <div className="border-t border-border/50 mb-4 shrink-0" />
 
-                        {/* Backup List */}
-                        <div className="flex items-center justify-between mb-3 shrink-0">
-                          <span className="text-xs text-muted-foreground">{t("vmLxc.backups.available")}</span>
-                          <Badge variant="secondary" className="text-xs h-5">{vmBackups.length}</Badge>
-                        </div>
-
-                        {loadingBackups ? (
-                          <div className="flex-1 flex items-center justify-center text-muted-foreground min-h-0">
-                            <Loader2 className="h-4 w-4 animate-spin mr-2" />
-                            <span className="text-sm">{t("vmLxc.backups.loading")}</span>
-                          </div>
-                        ) : vmBackups.length === 0 ? (
-                          <div className="flex-1 flex flex-col items-center justify-center text-muted-foreground min-h-0">
-                            <Archive className="h-12 w-12 mb-3 opacity-30" />
-                            <span className="text-sm">{t("vmLxc.backups.empty")}</span>
-                            <span className="text-xs mt-1">{t("vmLxc.backups.emptyHint")}</span>
-                          </div>
-                        ) : (
-                          <div className="space-y-2 flex-1 overflow-y-auto min-h-0 pr-1 -mr-1">
-                            {vmBackups.map((backup, index) => (
-                              <div 
-                                key={`backup-${backup.volid}-${index}`}
-                                className="flex items-center justify-between p-3 rounded-lg bg-muted/30 hover:bg-muted/50 transition-colors"
-                              >
-                                <div className="flex items-center gap-2 flex-1 min-w-0">
-                                  <div className="w-2 h-2 rounded-full bg-green-500 flex-shrink-0" />
-                                  <Clock className="h-4 w-4 text-muted-foreground flex-shrink-0" />
-                                  <span className="text-sm text-foreground">{backup.date}</span>
-                                  <Badge 
-                                    variant="outline" 
-                                    className={`text-xs ml-auto flex-shrink-0 ${getStorageColor(backup.storage).bg} ${getStorageColor(backup.storage).text} ${getStorageColor(backup.storage).border}`}
-                                  >
-                                    {backup.storage}
-                                  </Badge>
-                                </div>
-                                <Badge variant="outline" className="font-mono ml-2 flex-shrink-0">
-                                  {backup.size_human}
-                                </Badge>
-                              </div>
-                            ))}
-                          </div>
-                        )}
+                        <GuestBackupList
+                          key={selectedVM.vmid}
+                          vmid={selectedVM.vmid}
+                          backups={vmBackups}
+                          loading={loadingBackups}
+                          onRefresh={async () => {
+                            vmModalCacheRef.current.backups.delete(selectedVM.vmid)
+                            await fetchVmBackups(selectedVM.vmid, true)
+                          }}
+                          storageColor={getStorageColor}
+                        />
                       </CardContent>
                     </Card>
                   </div>
diff --git a/AppImage/lib/guest-backup-archives.ts b/AppImage/lib/guest-backup-archives.ts
new file mode 100644
index 00000000..68dceb18
--- /dev/null
+++ b/AppImage/lib/guest-backup-archives.ts
@@ -0,0 +1,55 @@
+import { fetchApi } from './api-config'
+
+export interface GuestBackup {
+  volid: string
+  storage: string
+  type: string
+  size: number
+  size_human: string
+  timestamp: number
+  date: string
+  notes?: string
+  protected?: boolean
+}
+
+export interface BackupDeletionResult {
+  volid: string
+  status: 'deleted' | 'pending' | 'unconfirmed'
+  task?: string
+  error?: string
+}
+
+// Exposed separately so callers can invalidate their inventory even after a
+// lost POST response. Never retry the destructive request automatically.
+export async function deleteGuestBackups(vmid: number, backups: GuestBackup[]): Promise<BackupDeletionResult[]> {
+  const response = await fetchApi<{ results: BackupDeletionResult[] }>(`/api/vms/${vmid}/backups/delete`, {
+    method: 'POST',
+    body: JSON.stringify({ confirm: true, backups: backups.map(({ volid, storage }) => ({ volid, storage })) }),
+    // Up to 20 archives, checked first and then deleted four at a time.
+    signal: AbortSignal.timeout(300_000),
+  })
+  if (!Array.isArray(response.results) || response.results.length !== backups.length ||
+      response.results.some((result, index) => result.volid !== backups[index].volid ||
+        !['deleted', 'pending', 'unconfirmed'].includes(result.status))) throw new Error('deletionUnconfirmed')
+
+  return Promise.all(response.results.map(async result => {
+    if (result.status !== 'pending' || !result.task) return result
+    const deadline = Date.now() + 120_000
+    let failures = 0
+    while (Date.now() < deadline) {
+      await new Promise(resolve => setTimeout(resolve, 1500))
+      try {
+        const status = await fetchApi<BackupDeletionResult>(
+          `/api/vms/${vmid}/backups/delete-status?task=${encodeURIComponent(result.task!)}`,
+          { signal: AbortSignal.timeout(10_000) },
+        )
+        if (status.volid !== result.volid || !['deleted', 'pending', 'unconfirmed'].includes(status.status)) break
+        if (status.status !== 'pending') return status
+        failures = 0
+      } catch {
+        if (++failures >= 3) break
+      }
+    }
+    return { ...result, status: 'unconfirmed', error: 'deletionUnconfirmed' }
+  }))
+}
diff --git a/AppImage/messages/de/common.json b/AppImage/messages/de/common.json
index acc5d1ff..af3432ed 100644
--- a/AppImage/messages/de/common.json
+++ b/AppImage/messages/de/common.json
@@ -1110,7 +1110,21 @@
       "available": "Verfügbare Backups",
       "loading": "Backups werden geladen...",
       "empty": "Keine Backups gefunden",
-      "emptyHint": "Erstellen Sie Ihr erstes Backup über die Schaltfläche oben"
+      "emptyHint": "Erstellen Sie Ihr erstes Backup über die Schaltfläche oben",
+      "refresh": "Aktualisieren",
+      "refreshFailed": "Sicherungen konnten nicht aktualisiert werden. Aktualisieren Sie erneut, um ihren aktuellen Zustand zu bestätigen.",
+      "deleteSelected": "Ausgewählte löschen ({count})",
+      "deletedCount": "{count} Sicherung(en) gelöscht.",
+      "unconfirmedCount": "Die Löschung von {count} Sicherung(en) wurde nicht bestätigt. Aktualisieren Sie die Liste und prüfen Sie die Proxmox-Aufgaben, bevor Sie es erneut versuchen.",
+      "deleteFailed": "Die Löschung konnte nicht bestätigt werden. Aktualisieren Sie die Liste und prüfen Sie die Proxmox-Aufgaben, bevor Sie es erneut versuchen.",
+      "selectHint": "Ungeschützte Sicherungen auswählen (bis zu 20 pro Durchgang)",
+      "selectBackup": "Sicherung auswählen",
+      "protected": "Geschützt",
+      "confirmTitle": "{count} Sicherung(en) löschen?",
+      "confirmDescription": "Diese Sicherungsarchive für VM/CT {vmid} werden dauerhaft gelöscht. Geschützte Sicherungen sind ausgeschlossen. Der Gast wird dadurch nicht gelöscht.",
+      "deleting": "Warten, bis Proxmox die ausgewählten Archive gelöscht hat…",
+      "cancel": "Abbrechen",
+      "confirmDelete": "Sicherungen löschen"
     },
     "updatesPanel": {
       "pendingTitle": "Ausstehende Paketaktualisierungen",
diff --git a/AppImage/messages/en/common.json b/AppImage/messages/en/common.json
index b8aff9b4..ad401066 100644
--- a/AppImage/messages/en/common.json
+++ b/AppImage/messages/en/common.json
@@ -1131,7 +1131,21 @@
       "available": "Available backups",
       "loading": "Loading backups...",
       "empty": "No backups found",
-      "emptyHint": "Create your first backup using the button above"
+      "emptyHint": "Create your first backup using the button above",
+      "refresh": "Refresh",
+      "refreshFailed": "Could not refresh backups. Refresh again to confirm their current state.",
+      "deleteSelected": "Delete selected ({count})",
+      "deletedCount": "{count} backup(s) deleted.",
+      "unconfirmedCount": "Deletion of {count} backup(s) was not confirmed. Refresh the list and check Proxmox Tasks before trying again.",
+      "deleteFailed": "Deletion could not be confirmed. Refresh the list and check Proxmox Tasks before trying again.",
+      "selectHint": "Select unprotected backups (up to 20 per batch)",
+      "selectBackup": "Select backup",
+      "protected": "Protected",
+      "confirmTitle": "Delete {count} backup(s)?",
+      "confirmDescription": "These backup archives for VM/CT {vmid} will be permanently deleted. Protected backups are excluded. This does not delete the guest.",
+      "deleting": "Waiting for Proxmox to finish deleting the selected archives…",
+      "cancel": "Cancel",
+      "confirmDelete": "Delete backups"
     },
     "updatesPanel": {
       "pendingTitle": "Pending package updates",
diff --git a/AppImage/messages/es/common.json b/AppImage/messages/es/common.json
index 7314cd0f..ac11c441 100644
--- a/AppImage/messages/es/common.json
+++ b/AppImage/messages/es/common.json
@@ -1110,7 +1110,21 @@
       "available": "Backups disponibles",
       "loading": "Cargando backups...",
       "empty": "No se encontraron backups",
-      "emptyHint": "Crea tu primer backup con el botón de arriba"
+      "emptyHint": "Crea tu primer backup con el botón de arriba",
+      "refresh": "Actualizar",
+      "refreshFailed": "No se pudieron actualizar los backups. Vuelve a actualizar para confirmar su estado actual.",
+      "deleteSelected": "Eliminar los seleccionados ({count})",
+      "deletedCount": "{count} backup(s) eliminado(s).",
+      "unconfirmedCount": "No se ha confirmado la eliminación de {count} backup(s). Actualiza la lista y comprueba las tareas de Proxmox antes de volver a intentarlo.",
+      "deleteFailed": "No se pudo confirmar la eliminación. Actualiza la lista y comprueba las tareas de Proxmox antes de volver a intentarlo.",
+      "selectHint": "Selecciona backups sin protección (hasta 20 por lote)",
+      "selectBackup": "Seleccionar backup",
+      "protected": "Protegido",
+      "confirmTitle": "¿Eliminar {count} backup(s)?",
+      "confirmDescription": "Los archivos de backup de la VM/CT {vmid} se eliminarán de forma permanente. Los backups protegidos quedan fuera. La VM o el contenedor no se eliminan.",
+      "deleting": "Esperando a que Proxmox termine de eliminar los archivos seleccionados…",
+      "cancel": "Cancelar",
+      "confirmDelete": "Eliminar backups"
     },
     "updatesPanel": {
       "pendingTitle": "Actualizaciones de paquetes pendientes",
diff --git a/AppImage/messages/fr/common.json b/AppImage/messages/fr/common.json
index 017d5002..ea21a414 100644
--- a/AppImage/messages/fr/common.json
+++ b/AppImage/messages/fr/common.json
@@ -1110,7 +1110,21 @@
       "available": "Sauvegardes disponibles",
       "loading": "Chargement des sauvegardes...",
       "empty": "Aucune sauvegarde trouvée",
-      "emptyHint": "Créez votre première sauvegarde en utilisant le bouton ci-dessus"
+      "emptyHint": "Créez votre première sauvegarde en utilisant le bouton ci-dessus",
+      "refresh": "Actualiser",
+      "refreshFailed": "Impossible d'actualiser les sauvegardes. Actualisez à nouveau pour confirmer leur état actuel.",
+      "deleteSelected": "Supprimer la sélection ({count})",
+      "deletedCount": "{count} sauvegarde(s) supprimée(s).",
+      "unconfirmedCount": "La suppression de {count} sauvegarde(s) n'a pas été confirmée. Actualisez la liste et vérifiez les tâches Proxmox avant de réessayer.",
+      "deleteFailed": "La suppression n'a pas pu être confirmée. Actualisez la liste et vérifiez les tâches Proxmox avant de réessayer.",
+      "selectHint": "Sélectionnez les sauvegardes non protégées (jusqu'à 20 par lot)",
+      "selectBackup": "Sélectionner la sauvegarde",
+      "protected": "Protégée",
+      "confirmTitle": "Supprimer {count} sauvegarde(s) ?",
+      "confirmDescription": "Ces archives de sauvegarde de la VM/CT {vmid} seront définitivement supprimées. Les sauvegardes protégées sont exclues. Cela ne supprime pas l'invité.",
+      "deleting": "En attente de la fin de la suppression des archives sélectionnées par Proxmox…",
+      "cancel": "Annuler",
+      "confirmDelete": "Supprimer les sauvegardes"
     },
     "updatesPanel": {
       "pendingTitle": "Mises à jour des packages en attente",
diff --git a/AppImage/messages/it/common.json b/AppImage/messages/it/common.json
index b6b9d41f..8e39c5c5 100644
--- a/AppImage/messages/it/common.json
+++ b/AppImage/messages/it/common.json
@@ -1110,7 +1110,21 @@
       "available": "Backup disponibili",
       "loading": "Caricamento backup...",
       "empty": "Nessun backup trovato",
-      "emptyHint": "Crea il primo backup con il pulsante in alto"
+      "emptyHint": "Crea il primo backup con il pulsante in alto",
+      "refresh": "Aggiorna",
+      "refreshFailed": "Impossibile aggiornare i backup. Aggiorna di nuovo per confermarne lo stato attuale.",
+      "deleteSelected": "Elimina selezionati ({count})",
+      "deletedCount": "{count} backup eliminati.",
+      "unconfirmedCount": "L'eliminazione di {count} backup non è stata confermata. Aggiorna l'elenco e controlla le attività di Proxmox prima di riprovare.",
+      "deleteFailed": "Impossibile confermare l'eliminazione. Aggiorna l'elenco e controlla le attività di Proxmox prima di riprovare.",
+      "selectHint": "Seleziona i backup non protetti (fino a 20 per gruppo)",
+      "selectBackup": "Seleziona backup",
+      "protected": "Protetto",
+      "confirmTitle": "Eliminare {count} backup?",
+      "confirmDescription": "Questi archivi di backup della VM/CT {vmid} verranno eliminati definitivamente. I backup protetti sono esclusi. Questo non elimina l'ospite.",
+      "deleting": "In attesa che Proxmox termini l'eliminazione degli archivi selezionati…",
+      "cancel": "Annulla",
+      "confirmDelete": "Elimina backup"
     },
     "updatesPanel": {
       "pendingTitle": "Aggiornamenti pacchetti in sospeso",
diff --git a/AppImage/messages/pt/common.json b/AppImage/messages/pt/common.json
index a056e729..596a1b91 100644
--- a/AppImage/messages/pt/common.json
+++ b/AppImage/messages/pt/common.json
@@ -1110,7 +1110,21 @@
       "available": "Backups disponíveis",
       "loading": "Carregando backups...",
       "empty": "Nenhum backup encontrado",
-      "emptyHint": "Crie seu primeiro backup usando o botão acima"
+      "emptyHint": "Crie seu primeiro backup usando o botão acima",
+      "refresh": "Atualizar",
+      "refreshFailed": "Não foi possível atualizar as cópias de segurança. Atualize novamente para confirmar o seu estado atual.",
+      "deleteSelected": "Eliminar selecionadas ({count})",
+      "deletedCount": "{count} cópia(s) de segurança eliminada(s).",
+      "unconfirmedCount": "A eliminação de {count} cópia(s) de segurança não foi confirmada. Atualize a lista e verifique as tarefas do Proxmox antes de tentar novamente.",
+      "deleteFailed": "Não foi possível confirmar a eliminação. Atualize a lista e verifique as tarefas do Proxmox antes de tentar novamente.",
+      "selectHint": "Selecione cópias de segurança sem proteção (até 20 por lote)",
+      "selectBackup": "Selecionar cópia de segurança",
+      "protected": "Protegida",
+      "confirmTitle": "Eliminar {count} cópia(s) de segurança?",
+      "confirmDescription": "Estes arquivos de cópia de segurança da VM/CT {vmid} serão eliminados permanentemente. As cópias protegidas estão excluídas. Isto não elimina o convidado.",
+      "deleting": "À espera que o Proxmox termine de eliminar os arquivos selecionados…",
+      "cancel": "Cancelar",
+      "confirmDelete": "Eliminar cópias de segurança"
     },
     "updatesPanel": {
       "pendingTitle": "Atualizações de pacote pendentes",
diff --git a/AppImage/messages/sk/common.json b/AppImage/messages/sk/common.json
index c756476e..875558de 100644
--- a/AppImage/messages/sk/common.json
+++ b/AppImage/messages/sk/common.json
@@ -1131,7 +1131,21 @@
       "available": "Dostupné zálohy",
       "loading": "Načítavam zálohy...",
       "empty": "Nenašli sa žiadne zálohy",
-      "emptyHint": "Prvú zálohu vytvoríte tlačidlom vyššie"
+      "emptyHint": "Prvú zálohu vytvoríte tlačidlom vyššie",
+      "refresh": "Obnoviť",
+      "refreshFailed": "Nepodarilo sa obnoviť zálohy. Obnovte ich znova, aby ste potvrdili ich aktuálny stav.",
+      "deleteSelected": "Odstrániť vybrané ({count})",
+      "deletedCount": "Odstránené zálohy: {count}.",
+      "unconfirmedCount": "Odstránenie záloh ({count}) nebolo potvrdené. Pred ďalším pokusom obnovte zoznam a skontrolujte úlohy v Proxmoxe.",
+      "deleteFailed": "Odstránenie sa nepodarilo potvrdiť. Pred ďalším pokusom obnovte zoznam a skontrolujte úlohy v Proxmoxe.",
+      "selectHint": "Vyberte nechránené zálohy (najviac 20 v jednej dávke)",
+      "selectBackup": "Vybrať zálohu",
+      "protected": "Chránená",
+      "confirmTitle": "Odstrániť zálohy ({count})?",
+      "confirmDescription": "Tieto archívy záloh pre VM/CT {vmid} budú natrvalo odstránené. Chránené zálohy sú vylúčené. Hosť sa tým neodstráni.",
+      "deleting": "Čaká sa, kým Proxmox dokončí odstránenie vybraných archívov…",
+      "cancel": "Zrušiť",
+      "confirmDelete": "Odstrániť zálohy"
     },
     "updatesPanel": {
       "pendingTitle": "Čakajúce aktualizácie balíkov",
diff --git a/AppImage/messages/sv/common.json b/AppImage/messages/sv/common.json
index c811610c..88fae39a 100644
--- a/AppImage/messages/sv/common.json
+++ b/AppImage/messages/sv/common.json
@@ -1110,7 +1110,21 @@
       "available": "Tillgängliga säkerhetskopior",
       "loading": "Laddar säkerhetskopior...",
       "empty": "Inga säkerhetskopior hittades",
-      "emptyHint": "Skapa din första säkerhetskopia med knappen ovan"
+      "emptyHint": "Skapa din första säkerhetskopia med knappen ovan",
+      "refresh": "Uppdatera",
+      "refreshFailed": "Det gick inte att uppdatera säkerhetskopiorna. Uppdatera igen för att bekräfta deras aktuella tillstånd.",
+      "deleteSelected": "Ta bort markerade ({count})",
+      "deletedCount": "{count} säkerhetskopior har tagits bort.",
+      "unconfirmedCount": "Borttagning av {count} säkerhetskopior har inte bekräftats. Uppdatera listan och kontrollera Proxmox uppgifter innan du försöker igen.",
+      "deleteFailed": "Borttagningen kunde inte bekräftas. Uppdatera listan och kontrollera Proxmox uppgifter innan du försöker igen.",
+      "selectHint": "Välj oskyddade säkerhetskopior (upp till 20 per omgång)",
+      "selectBackup": "Välj säkerhetskopia",
+      "protected": "Skyddad",
+      "confirmTitle": "Ta bort {count} säkerhetskopior?",
+      "confirmDescription": "Dessa säkerhetskopieringsarkiv för VM/CT {vmid} kommer att tas bort permanent. Skyddade säkerhetskopior är undantagna. Detta tar inte bort gästen.",
+      "deleting": "Väntar på att Proxmox ska slutföra borttagningen av de valda arkiven…",
+      "cancel": "Avbryt",
+      "confirmDelete": "Ta bort säkerhetskopior"
     },
     "updatesPanel": {
       "pendingTitle": "Väntande paketuppdateringar",
diff --git a/AppImage/scripts/build_appimage.sh b/AppImage/scripts/build_appimage.sh
index b0df1302..fb7d8281 100755
--- a/AppImage/scripts/build_appimage.sh
+++ b/AppImage/scripts/build_appimage.sh
@@ -181,6 +181,7 @@ done
 cp "$SCRIPT_DIR/oci_manager.py" "$APP_DIR/usr/bin/" 2>/dev/null || echo "⚠️  oci_manager.py not found"
 cp "$SCRIPT_DIR/flask_oci_routes.py" "$APP_DIR/usr/bin/" 2>/dev/null || echo "⚠️  flask_oci_routes.py not found"
 cp "$SCRIPT_DIR/flask_vm_backup_routes.py" "$APP_DIR/usr/bin/" 2>/dev/null || echo "⚠️  flask_vm_backup_routes.py not found"
+cp "$SCRIPT_DIR/guest_backup_archives.py" "$APP_DIR/usr/bin/"
 cp "$SCRIPT_DIR/flask_audit_routes.py" "$APP_DIR/usr/bin/" 2>/dev/null || echo "⚠️  flask_audit_routes.py not found"
 cp "$SCRIPT_DIR/audit_store.py" "$APP_DIR/usr/bin/" 2>/dev/null || echo "⚠️  audit_store.py not found"
 cp "$SCRIPT_DIR/audit_checks.py" "$APP_DIR/usr/bin/" 2>/dev/null || echo "⚠️  audit_checks.py not found"
diff --git a/AppImage/scripts/flask_server.py b/AppImage/scripts/flask_server.py
index ec9d029e..23c70eee 100644
--- a/AppImage/scripts/flask_server.py
+++ b/AppImage/scripts/flask_server.py
@@ -95,6 +95,8 @@ from flask_notification_routes import notification_bp  # noqa: E402
 from flask_oci_routes import oci_bp  # noqa: E402
 from flask_audit_routes import audit_bp  # noqa: E402
 from flask_vm_backup_routes import vm_backup_bp  # noqa: E402
+from guest_backup_archives import (BackupArchiveError, delete_guest_backups,
+                                   guest_backup_deletion_status)  # noqa: E402
 from notification_manager import notification_manager, resolve_notification_hostname  # noqa: E402
 import post_install_versions  # noqa: E402  — Sprint 12A: detect post-install function updates
 from jwt_middleware import require_auth, require_auth_or_ticket, require_admin_scope  # noqa: E402
@@ -13303,6 +13305,32 @@ def api_create_backup(vmid):
     except Exception as e:
         return jsonify({'error': str(e)}), 500
 
+@app.route('/api/vms/<int:vmid>/backups/delete', methods=['POST'])
+@require_admin_scope
+def api_delete_vm_backups(vmid):
+    """Delete an explicitly confirmed selection, revalidated by Proxmox."""
+    try:
+        return jsonify(delete_guest_backups(vmid, request.get_json(silent=True)))
+    except BackupArchiveError as error:
+        return jsonify({'error': str(error)}), error.code
+    finally:
+        # Native deletion may have started even if the pvesh response was lost.
+        _vm_cache_invalidate(vmid, _vm_backups_cache)
+
+
+@app.route('/api/vms/<int:vmid>/backups/delete-status', methods=['GET'])
+@require_admin_scope
+def api_vm_backup_deletion_status(vmid):
+    """Only poll deletion tasks started here for this guest."""
+    try:
+        result = guest_backup_deletion_status(vmid, request.args.get('task'))
+        if result['status'] != 'pending':
+            _vm_cache_invalidate(vmid, _vm_backups_cache)
+        return jsonify(result)
+    except BackupArchiveError as error:
+        return jsonify({'error': str(error)}), error.code
+
+
 @app.route('/api/vms/<int:vmid>/backups', methods=['GET'])
 @require_auth
 def api_vm_backups(vmid):
@@ -13383,6 +13411,7 @@ def api_vm_backups(vmid):
                             'timestamp': ctime,
                             'date': datetime.fromtimestamp(ctime).strftime('%Y-%m-%d %H:%M') if ctime else '',
                             'notes': item.get('notes', ''),
+                            'protected': item.get('protected', False) not in (False, 0, '0', '', None),
                         })
                 except Exception:
                     pass
diff --git a/AppImage/scripts/guest_backup_archives.py b/AppImage/scripts/guest_backup_archives.py
new file mode 100644
index 00000000..7458c631
--- /dev/null
+++ b/AppImage/scripts/guest_backup_archives.py
@@ -0,0 +1,172 @@
+# ==========================================================
+# ProxMenux Monitor - Guest backup archives
+# Author      : Jonatan
+# GitHub      : github.com/jcastro
+# Maintainer  : MacRimi
+# Copyright   : (c) 2026 MacRimi & contributors
+# License     : (GPL-3.0) (https://github.com/MacRimi/ProxMenux/blob/main/LICENSE)
+# Version     : 1.0
+# Last Updated: 16/10/2026
+# ==========================================================
+# Description:
+# Deletes explicitly selected VM/CT backups through the native Proxmox
+# storage API after a fresh inventory/protection check. Tracks native
+# deletion tasks so an accepted operation is not mistaken for completion.
+# No filesystem paths or cached inventory authorize deletion.
+# ==========================================================
+
+import json
+import re
+import socket
+import subprocess
+import threading
+import time
+from concurrent.futures import ThreadPoolExecutor
+
+
+MAX_SELECTION = 20
+REMOVED_RE = re.compile(r"Removed volume '[^'\n]+'")
+STORAGE_RE = re.compile(r"[A-Za-z0-9][A-Za-z0-9._-]{0,63}")
+NODE_RE = re.compile(r"[A-Za-z0-9][A-Za-z0-9-]{0,62}")
+_tasks = {}
+_lock = threading.Lock()
+
+
+class BackupArchiveError(Exception):
+    def __init__(self, message, code=400):
+        super().__init__(message)
+        self.code = code
+
+
+def _pvesh(args, timeout=20):
+    try:
+        result = subprocess.run(["pvesh", *args, "--output-format", "json"],
+                                capture_output=True, text=True, timeout=timeout)
+    except (OSError, subprocess.TimeoutExpired) as error:
+        raise BackupArchiveError("Proxmox command unavailable or timed out; outcome unconfirmed", 502) from error
+    if result.returncode:
+        raise BackupArchiveError((result.stderr or "Proxmox command failed").strip()[:1000], 502)
+    output = result.stdout.strip()
+    try:
+        # pvesh can print no bytes for the API's successful null result.
+        return json.loads(output or "null")
+    except (ValueError, TypeError) as error:
+        # With --delay, a deletion that ends in time prints the line of its
+        # task log instead of JSON. Only that exact line is accepted.
+        if args[0] == "delete" and REMOVED_RE.fullmatch(output):
+            return output
+        raise BackupArchiveError("Invalid Proxmox response; outcome unconfirmed", 502) from error
+
+
+def _node():
+    # Same local storage/node scope as the guest's existing backup list.
+    node = socket.gethostname().split(".")[0]
+    if not NODE_RE.fullmatch(node):
+        raise BackupArchiveError("Invalid local node name", 502)
+    return node
+
+
+def _selection(vmid, data):
+    if not 100 <= vmid <= 999999999:
+        raise BackupArchiveError("Invalid VM/CT ID")
+    if not isinstance(data, dict) or data.get("confirm") is not True:
+        raise BackupArchiveError("Explicit confirmation is required")
+    selected = data.get("backups")
+    if not isinstance(selected, list) or not 1 <= len(selected) <= MAX_SELECTION:
+        raise BackupArchiveError(f"Select between 1 and {MAX_SELECTION} backups")
+    seen = set()
+    for item in selected:
+        if not isinstance(item, dict):
+            raise BackupArchiveError("Invalid backup selection")
+        storage, volid = item.get("storage"), item.get("volid")
+        if not isinstance(storage, str) or not STORAGE_RE.fullmatch(storage):
+            raise BackupArchiveError("Invalid backup storage")
+        if (not isinstance(volid, str) or not volid.startswith(storage + ":")
+                or len(volid) > 512 or not re.fullmatch(r"[A-Za-z0-9_:./+@-]+", volid)
+                or any(part in ("", ".", "..") for part in volid.split(":", 1)[1].split("/"))):
+            raise BackupArchiveError("Invalid backup volume ID")
+        if volid in seen:
+            raise BackupArchiveError("Duplicate backup selection")
+        seen.add(volid)
+    return [{"storage": item["storage"], "volid": item["volid"]} for item in selected]
+
+
+def _protected(value):
+    # Fail closed for an unexpected protection value, including the text 'true'.
+    return value not in (None, False, 0, "0", "")
+
+
+def _remember_task(task, vmid, node, volid):
+    # These are server-returned task IDs, never arbitrary client paths.
+    if (not isinstance(task, str) or not task.startswith(f"UPID:{node}:")
+            or ":imgdel:" not in task or "/" in task or len(task) > 1024):
+        raise BackupArchiveError("Unexpected deletion task; outcome unconfirmed", 502)
+    with _lock:
+        now = time.monotonic()
+        expired = [key for key, entry in _tasks.items() if now - entry["created"] > 3600]
+        for key in expired:
+            del _tasks[key]
+        # Bound even failed/unpolled jobs; expiry does not cancel a PVE task.
+        if len(_tasks) >= 512:
+            del _tasks[min(_tasks, key=lambda key: _tasks[key]["created"])]
+        _tasks[task] = {"vmid": vmid, "node": node, "volid": volid, "created": now}
+
+
+def delete_guest_backups(vmid, data):
+    selected = _selection(vmid, data)
+    node = _node()
+    inventory = {}
+    # Preflight the entire batch before deleting anything. An unavailable
+    # storage or a protected/stale/cross-guest selection fails the whole batch.
+    for storage in sorted({item["storage"] for item in selected}):
+        entries = _pvesh(["get", f"/nodes/{node}/storage/{storage}/content",
+                          "--content", "backup", "--vmid", str(vmid)])
+        if not isinstance(entries, list):
+            raise BackupArchiveError("Invalid backup inventory", 502)
+        for entry in entries:
+            if (isinstance(entry, dict) and entry.get("content") == "backup"
+                    and isinstance(entry.get("volid"), str)):
+                inventory[(storage, entry.get("volid"))] = entry
+    for item in selected:
+        entry = inventory.get((item["storage"], item["volid"]))
+        if entry is None or str(entry.get("vmid")) != str(vmid):
+            raise BackupArchiveError("Backup no longer exists or does not belong to this VM/CT", 409)
+        if _protected(entry.get("protected")):
+            raise BackupArchiveError("Protected backups cannot be deleted", 409)
+
+    def remove(item):
+        try:
+            # Proxmox also enforces protection at deletion time. It removes
+            # associated notes/log files and returns null only after success.
+            task = _pvesh(["delete", f'/nodes/{node}/storage/{item["storage"]}/content/{item["volid"]}',
+                            "--delay", "1"])
+            if isinstance(task, str) and task.startswith("UPID:"):
+                _remember_task(task, vmid, node, item["volid"])
+                return {**item, "status": "pending", "task": task}
+            if task is None or task == f"Removed volume '{item['volid']}'":
+                return {**item, "status": "deleted"}
+            return {**item, "status": "unconfirmed", "error": "Invalid Proxmox response; outcome unconfirmed"}
+        except BackupArchiveError as error:
+            return {**item, "status": "unconfirmed", "error": str(error)}
+
+    with ThreadPoolExecutor(max_workers=min(4, len(selected)), thread_name_prefix="backup-delete") as pool:
+        results = list(pool.map(remove, selected))
+    return {"results": results}
+
+
+def guest_backup_deletion_status(vmid, task):
+    with _lock:
+        entry = _tasks.get(task) if isinstance(task, str) else None
+        if not entry or entry["vmid"] != vmid or time.monotonic() - entry["created"] > 3600:
+            raise BackupArchiveError("Deletion task unknown or expired; refresh the backup list", 409)
+        entry = entry.copy()
+    status = _pvesh(["get", f'/nodes/{entry["node"]}/tasks/{task}/status'])
+    if not isinstance(status, dict) or status.get("status") not in ("running", "stopped"):
+        raise BackupArchiveError("Invalid deletion task status", 502)
+    result = {"volid": entry["volid"], "status": "pending"}
+    if status["status"] == "stopped":
+        if status.get("exitstatus") == "OK":
+            result["status"] = "deleted"
+        else:
+            result.update(status="unconfirmed", error=status.get("exitstatus") or "Deletion outcome unconfirmed")
+    return result
diff --git a/tests/test_guest_backup_archives.cjs b/tests/test_guest_backup_archives.cjs
new file mode 100644
index 00000000..6544c9df
--- /dev/null
+++ b/tests/test_guest_backup_archives.cjs
@@ -0,0 +1,69 @@
+// Run the shipped deletion client with only its authenticated transport replaced.
+const assert = require('node:assert/strict');
+const fs = require('node:fs');
+const vm = require('node:vm');
+const ts = require('typescript');
+const source = fs.readFileSync('AppImage/lib/guest-backup-archives.ts', 'utf8');
+const js = ts.transpileModule(source, { compilerOptions: { module: ts.ModuleKind.CommonJS, target: ts.ScriptTarget.ES2020 } }).outputText;
+const backup = { volid: 'local:backup/vzdump-lxc-100-fixture.tar.zst', storage: 'local' };
+
+async function run(responses) {
+  const calls = [];
+  const context = { exports: {}, AbortSignal, Date, setTimeout: callback => callback(), require: name => {
+    assert.equal(name, './api-config');
+    return { fetchApi: async (path, options) => {
+      calls.push({ path, options });
+      assert.ok(responses.length, `unexpected call: ${path}`);
+      const response = responses.shift();
+      if (response instanceof Error) throw response;
+      return response;
+    } };
+  } };
+  vm.runInNewContext(js, context);
+  let results, error;
+  try { results = JSON.parse(JSON.stringify(await context.exports.deleteGuestBackups(100, [backup]))); }
+  catch (caught) { error = caught; }
+  return { calls, results, error };
+}
+
+(async () => {
+  const success = await run([{ results: [{ volid: backup.volid, status: 'deleted' }] }]);
+  assert.equal(success.results[0].status, 'deleted');
+  assert.deepEqual(JSON.parse(success.calls[0].options.body), { confirm: true, backups: [backup] });
+  assert.equal(success.calls[0].options.method, 'POST');
+  assert.equal(success.calls.length, 1);
+  const task = 'UPID:pve1:01:02:03:imgdel:100:root@pam:';
+  const pending = { results: [{ volid: backup.volid, status: 'pending', task }] };
+  const completed = await run([pending, { volid: backup.volid, status: 'pending' }, { volid: backup.volid, status: 'deleted' }]);
+  assert.equal(completed.results[0].status, 'deleted');
+  assert.equal(completed.calls.length, 3);
+  assert.equal(completed.calls[1].path, `/api/vms/100/backups/delete-status?task=${encodeURIComponent(task)}`);
+  assert.equal(completed.calls.filter(call => call.options.method === 'POST').length, 1);
+  const failed = await run([pending, { volid: backup.volid, status: 'unconfirmed', error: 'protected' }]);
+  assert.equal(failed.results[0].status, 'unconfirmed');
+  const lostPost = await run([new Error('network failure')]);
+  assert.equal(lostPost.error.message, 'network failure');
+  assert.equal(lostPost.calls.length, 1, 'never retry destructive POST');
+  const lostStatus = await run([pending, new Error('timeout'), new Error('timeout'), new Error('timeout')]);
+  assert.equal(lostStatus.results[0].status, 'unconfirmed');
+  assert.equal(lostStatus.calls.length, 4, 'bounded read failures');
+  for (const response of [{ results: [] }, { results: [{ volid: 'other', status: 'deleted' }] },
+                           { results: [{ volid: backup.volid, status: 'accepted' }] }]) {
+    assert.equal((await run([response])).error.message, 'deletionUnconfirmed');
+  }
+  const foreignStatus = await run([pending, { volid: 'other', status: 'deleted' }]);
+  assert.equal(foreignStatus.results[0].status, 'unconfirmed');
+
+  const component = fs.readFileSync('AppImage/components/guest-backup-list.tsx', 'utf8');
+  const english = JSON.parse(fs.readFileSync('AppImage/messages/en/common.json')).vmLxc.backups;
+  for (const [, key] of component.matchAll(/t\("vmLxc\.backups\.([A-Za-z]+)"/g)) {
+    assert.ok(typeof english[key] === 'string' && english[key].length, `English translation: ${key}`);
+  }
+  assert.ok(component.includes('disabled={disabled || !!backup.protected'));
+  assert.ok(component.includes('!backup.protected'));
+  assert.ok(component.includes('DialogDescription'));
+  const parent = fs.readFileSync('AppImage/components/virtual-machines.tsx', 'utf8');
+  assert.ok(parent.includes('<GuestBackupList'));
+  assert.ok(parent.includes('await fetchVmBackups(selectedVM.vmid, true)'));
+  console.log('PASS: native task completion, partial/unconfirmed outcomes, lost responses, no destructive retries, translated UI and forced refresh');
+})().catch(error => { console.error(error); process.exitCode = 1; });
diff --git a/tests/test_guest_backup_archives.py b/tests/test_guest_backup_archives.py
new file mode 100644
index 00000000..f9ff6769
--- /dev/null
+++ b/tests/test_guest_backup_archives.py
@@ -0,0 +1,239 @@
+"""Guest archive deletion contract. No real Proxmox commands or backups."""
+
+import ast
+import copy
+import importlib.util
+import json
+from pathlib import Path
+import subprocess
+import sys
+import types
+import unittest
+from unittest.mock import Mock, patch
+
+from flask import Flask, jsonify, request
+
+ROOT = Path(__file__).resolve().parents[1]
+SCRIPTS = ROOT / "AppImage/scripts"
+sys.path.insert(0, str(SCRIPTS))
+import guest_backup_archives as archives
+
+VOLUME = "local:backup/vzdump-lxc-100-2026_10_16-12_00_00.tar.zst"
+OTHER = VOLUME.replace("12_00_00", "13_00_00")
+TASK = "UPID:pve1:00000001:00000002:00000003:imgdel:100:root@pam:"
+
+
+class DeletionTests(unittest.TestCase):
+    def setUp(self):
+        self.node = patch.object(archives, "_node", return_value="pve1")
+        self.node.start()
+        self.addCleanup(self.node.stop)
+        self.inventory = [{"volid": VOLUME, "vmid": 100, "content": "backup", "protected": False}]
+        self.calls = []
+        self.response = None
+        archives._tasks.clear()
+
+    def run_pvesh(self, args, **kwargs):
+        self.calls.append(args)
+        if args[0] == "get" and args[1].endswith("/content"):
+            return copy.deepcopy(self.inventory)
+        if args[0] == "delete":
+            if isinstance(self.response, Exception):
+                raise self.response
+            return self.response
+        return {"status": "stopped", "exitstatus": "OK"}
+
+    def delete(self, volumes=(VOLUME,), **kwargs):
+        data = {"confirm": True, "backups": [{"storage": v.split(":")[0], "volid": v} for v in volumes]}
+        data.update(kwargs)
+        with patch.object(archives, "_pvesh", side_effect=self.run_pvesh):
+            return archives.delete_guest_backups(100, data)
+
+    def test_success_uses_guest_filtered_native_inventory_and_delete(self):
+        self.assertEqual(self.delete()["results"], [{"storage": "local", "volid": VOLUME, "status": "deleted"}])
+        self.assertEqual(self.calls, [
+            ["get", "/nodes/pve1/storage/local/content", "--content", "backup", "--vmid", "100"],
+            ["delete", f"/nodes/pve1/storage/local/content/{VOLUME}", "--delay", "1"],
+        ])
+
+    def test_a_deletion_that_ends_within_the_delay_prints_its_log_and_counts_as_deleted(self):
+        # Real pvesh output on a directory storage: the task log, not JSON.
+        run = subprocess.CompletedProcess([], 0, stdout=f"Removed volume '{VOLUME}'\n", stderr="")
+        with patch.object(archives.subprocess, "run", return_value=run):
+            self.assertEqual(archives._pvesh(["delete", f"/nodes/pve1/storage/local/content/{VOLUME}", "--delay", "1"]),
+                             f"Removed volume '{VOLUME}'")
+        self.response = f"Removed volume '{VOLUME}'"
+        self.assertEqual(self.delete()["results"][0]["status"], "deleted")
+        self.response = "Removed volume 'local:backup/another-archive.tar.zst'"
+        self.assertEqual(self.delete()["results"][0]["status"], "unconfirmed")
+        with patch.object(archives.subprocess, "run", return_value=run), self.assertRaises(archives.BackupArchiveError):
+            archives._pvesh(["get", "/nodes/pve1/storage/local/content"])
+
+    def test_bad_payloads_and_paths_never_reach_proxmox(self):
+        payloads = [None, [], {}, {"confirm": 1}, {"confirm": True, "backups": []},
+                    {"confirm": True, "backups": [None]}, {"confirm": True, "backups": [VOLUME]},
+                    {"confirm": True, "backups": [{"storage": "local", "volid": VOLUME}] * 21}]
+        for volid in ("local:../etc/passwd", "local:backup/../x", "local:/etc/pve/storage.cfg", "local:backup//x",
+                      "local:backup/x%2fy", "local:backup/x\n--force", "local:backup/x;touch /tmp/x", "other:backup/x"):
+            payloads.append({"confirm": True, "backups": [{"storage": "local", "volid": volid}]})
+        for storage in ("../local", "-x", "local\n", 2, None):
+            payloads.append({"confirm": True, "backups": [{"storage": storage, "volid": VOLUME}]})
+        with patch.object(archives, "_pvesh") as run:
+            for data in payloads:
+                with self.subTest(data=data), self.assertRaises(archives.BackupArchiveError):
+                    archives.delete_guest_backups(100, data)
+            for vmid in (0, 99, 1000000000):
+                with self.assertRaises(archives.BackupArchiveError):
+                    archives.delete_guest_backups(vmid, {"confirm": True, "backups": [{"storage": "local", "volid": VOLUME}]})
+        run.assert_not_called()
+
+    def test_duplicate_selection_rejected_before_commands(self):
+        with self.assertRaises(archives.BackupArchiveError):
+            self.delete((VOLUME, VOLUME))
+        self.assertEqual(self.calls, [])
+
+    def test_newly_protected_archives_fail_the_whole_batch(self):
+        self.inventory.append({"volid": OTHER, "vmid": 100, "content": "backup", "protected": True})
+        for protection in (True, 1, "1", "true", "unexpected"):
+            self.inventory[-1]["protected"] = protection
+            with self.subTest(protection=protection), self.assertRaises(archives.BackupArchiveError) as error:
+                self.delete((VOLUME, OTHER))
+            self.assertEqual(error.exception.code, 409)
+        self.assertFalse(any(call[0] == "delete" for call in self.calls))
+
+    def test_missing_cross_guest_and_non_backup_volumes_are_never_deleted(self):
+        for entries in ([], [{"volid": VOLUME, "vmid": 101, "content": "backup"}],
+                        [{"volid": VOLUME, "content": "backup"}],
+                        [{"volid": VOLUME, "vmid": 100, "content": "images"}]):
+            self.inventory = entries
+            with self.subTest(entries=entries), self.assertRaises(archives.BackupArchiveError):
+                self.delete()
+        self.assertFalse(any(call[0] == "delete" for call in self.calls))
+
+    def test_storage_failure_prevents_every_delete(self):
+        def unavailable(args):
+            self.assertEqual(args[0], "get")
+            raise archives.BackupArchiveError("offline", 502)
+        with patch.object(archives, "_pvesh", side_effect=unavailable), self.assertRaises(archives.BackupArchiveError):
+            archives.delete_guest_backups(100, {"confirm": True, "backups": [
+                {"volid": VOLUME, "storage": "local"}, {"volid": "nas:backup/x", "storage": "nas"}]})
+
+    def test_partial_native_errors_remain_unconfirmed(self):
+        self.inventory.append({"volid": OTHER, "vmid": 100, "content": "backup"})
+        def native(args):
+            if args[0] == "delete" and OTHER in args[1]:
+                raise archives.BackupArchiveError("backup is protected", 502)
+            return self.run_pvesh(args)
+        with patch.object(archives, "_pvesh", side_effect=native):
+            result = archives.delete_guest_backups(100, {"confirm": True, "backups": [
+                {"volid": v, "storage": "local"} for v in (VOLUME, OTHER)]})
+        self.assertEqual([item["status"] for item in result["results"]], ["deleted", "unconfirmed"])
+        self.assertIn("protected", result["results"][1]["error"])
+
+    def test_native_task_is_not_a_success_until_exit_ok(self):
+        self.response = TASK
+        result = self.delete()["results"][0]
+        self.assertEqual(result["status"], "pending")
+        for native, expected in (({"status": "running"}, "pending"),
+                                 ({"status": "stopped", "exitstatus": "OK"}, "deleted"),
+                                 ({"status": "stopped", "exitstatus": "cannot delete protected backup"}, "unconfirmed"),
+                                 ({"status": "stopped"}, "unconfirmed")):
+            with patch.object(archives, "_pvesh", return_value=native) as run:
+                answer = archives.guest_backup_deletion_status(100, TASK)
+            self.assertEqual(answer["status"], expected)
+            run.assert_called_once_with(["get", f"/nodes/pve1/tasks/{TASK}/status"])
+
+    def test_poll_cannot_read_arbitrary_tasks_or_other_guests(self):
+        self.response = TASK
+        self.delete()
+        with patch.object(archives, "_pvesh") as run:
+            for vmid, task in ((101, TASK), (100, "../../status"), (100, None), (100, TASK + "x")):
+                with self.assertRaises(archives.BackupArchiveError):
+                    archives.guest_backup_deletion_status(vmid, task)
+            archives._tasks[TASK]["created"] -= 3601
+            with self.assertRaises(archives.BackupArchiveError):
+                archives.guest_backup_deletion_status(100, TASK)
+        run.assert_not_called()
+
+    def test_invalid_native_task_answers_never_claim_success(self):
+        for response in ("", {}, [TASK], TASK.replace("imgdel", "vzdump"), TASK.replace("pve1", "pve2")):
+            self.response = response
+            with self.subTest(response=response):
+                self.assertEqual(self.delete()["results"][0]["status"], "unconfirmed")
+
+    def test_pvesh_uses_argv_and_handles_failure_and_timeout(self):
+        with patch.object(archives.subprocess, "run", return_value=types.SimpleNamespace(returncode=0, stdout="null")) as run:
+            self.assertIsNone(archives._pvesh(["delete", "/native/path"]))
+        self.assertEqual(run.call_args.args[0], ["pvesh", "delete", "/native/path", "--output-format", "json"])
+        self.assertNotIn("shell", run.call_args.kwargs)
+        with patch.object(archives.subprocess, "run", return_value=types.SimpleNamespace(returncode=0, stdout="")):
+            self.assertIsNone(archives._pvesh(["delete", "/native/path"]))
+        for response in (types.SimpleNamespace(returncode=1, stderr="protected", stdout=""),
+                         types.SimpleNamespace(returncode=0, stdout="not JSON")):
+            with patch.object(archives.subprocess, "run", return_value=response), self.assertRaises(archives.BackupArchiveError):
+                archives._pvesh(["delete", "/native/path"])
+        for error in (FileNotFoundError(), subprocess.TimeoutExpired("pvesh", 20)):
+            with patch.object(archives.subprocess, "run", side_effect=error), self.assertRaises(archives.BackupArchiveError):
+                archives._pvesh(["delete", "/native/path"])
+
+
+class RouteTests(unittest.TestCase):
+    """Compile the real route bodies/decorators without starting host services."""
+    def setUp(self):
+        auth = types.ModuleType("auth_manager")
+        auth.load_auth_config = lambda: {"enabled": True}
+        auth.verify_token = lambda token: "tester" if token == "admin" else None
+        auth.verify_token_full = lambda token: ("tester", "full_admin" if token == "admin" else "read_only")
+        spec = importlib.util.spec_from_file_location("guest_backup_test_middleware", SCRIPTS / "jwt_middleware.py")
+        middleware = importlib.util.module_from_spec(spec)
+        with patch.dict(sys.modules, auth_manager=auth):
+            spec.loader.exec_module(middleware)
+        self.app = Flask(__name__)
+        self.service = Mock(return_value={"results": []})
+        self.status = Mock(return_value={"volid": VOLUME, "status": "deleted"})
+        self.invalidate = Mock()
+        self.namespace = {"app": self.app, "require_admin_scope": middleware.require_admin_scope,
+                          "request": request, "jsonify": jsonify, "BackupArchiveError": archives.BackupArchiveError,
+                          "delete_guest_backups": self.service, "guest_backup_deletion_status": self.status,
+                          "_vm_cache_invalidate": self.invalidate, "_vm_backups_cache": {}}
+        source = ast.parse((SCRIPTS / "flask_server.py").read_text())
+        wanted = {"api_delete_vm_backups", "api_vm_backup_deletion_status"}
+        routes = [node for node in source.body if isinstance(node, ast.FunctionDef) and node.name in wanted]
+        self.assertEqual(len(routes), 2)
+        exec(compile(ast.Module(body=routes, type_ignores=[]), "flask_server.py", "exec"), self.namespace)
+        self.client = self.app.test_client()
+
+    def test_both_routes_reject_unauthenticated_and_read_only_requests(self):
+        for headers, status in (({}, 401), ({"Authorization": "Bearer reader"}, 403)):
+            self.assertEqual(self.client.post("/api/vms/100/backups/delete", json={}, headers=headers).status_code, status)
+            self.assertEqual(self.client.get("/api/vms/100/backups/delete-status?task=x", headers=headers).status_code, status)
+        self.service.assert_not_called()
+        self.status.assert_not_called()
+        self.invalidate.assert_not_called()
+
+    def test_admin_route_passes_payload_and_invalidates_even_after_errors(self):
+        data = {"confirm": True, "backups": [{"storage": "local", "volid": VOLUME}]}
+        headers = {"Authorization": "Bearer admin"}
+        self.assertEqual(self.client.post("/api/vms/100/backups/delete", json=data, headers=headers).status_code, 200)
+        self.service.assert_called_once_with(100, data)
+        self.invalidate.assert_called_once_with(100, {})
+        self.service.side_effect = archives.BackupArchiveError("protected", 409)
+        self.assertEqual(self.client.post("/api/vms/100/backups/delete", json=data, headers=headers).status_code, 409)
+        self.assertEqual(self.invalidate.call_count, 2)
+
+    def test_poll_invalidates_only_after_completion(self):
+        headers = {"Authorization": "Bearer admin"}
+        self.status.return_value = {"status": "pending"}
+        self.client.get("/api/vms/100/backups/delete-status?task=x", headers=headers)
+        self.invalidate.assert_not_called()
+        self.status.return_value = {"status": "deleted"}
+        self.client.get("/api/vms/100/backups/delete-status?task=x", headers=headers)
+        self.status.assert_called_with(100, "x")
+        self.invalidate.assert_called_once_with(100, {})
+
+    def test_runtime_module_is_shipped(self):
+        self.assertIn('cp "$SCRIPT_DIR/guest_backup_archives.py" "$APP_DIR/usr/bin/"', (SCRIPTS / "build_appimage.sh").read_text())
+
+
+if __name__ == "__main__":
+    unittest.main()