Keep guest services off PBS hosts, refuse only known PBS in PVE scripts and follow the menu conventions

- On a PBS host the Monitor no longer starts the node metrics and VM prewarmers, the LXC update scheduler, the managed installs detector or the app update emitter, which read guests and PVE metrics that do not exist there
- pmx_require_pve refuses only a host known to be PBS, so an unreadable package list leaves the PVE scripts working as before
- The PBS menu numbers its options, shows the tables proxmox-backup-manager prints instead of raw JSON, and says Goodbye on exit
- The PBS update asks to press Enter before returning
- Spanish: Datastores de PBS

AppImage/scripts/flask_server.py

@@ -23193,9 +23193,11 @@ if __name__ == '__main__':
             except Exception as e:
                 print(f"[ProxMenux] Disk temperature history init failed: {e}")
             try:
-                import managed_installs
-                managed_installs.detect_and_register()
-                print("[ProxMenux] Managed-installs registry initialised")
+                # A PBS host has no guests whose applications could be tracked.
+                if not is_pbs_host():
+                    import managed_installs
+                    managed_installs.detect_and_register()
+                    print("[ProxMenux] Managed-installs registry initialised")
             except Exception as e:
                 print(f"[ProxMenux] managed_installs init failed: {e}")
             # Docker inventories are derived runtime data and intentionally
@@ -23337,6 +23339,9 @@ if __name__ == '__main__':
     # the 24 h PollingCollector cycle. Runs in a daemon thread with
     # a delay so it doesn't block startup — notification_manager needs
     # a moment to bind channels before we emit.
+    # The guest services below read VMs, LXCs and the PVE node metrics,
+    # none of which exist on a Proxmox Backup Server.
+    pve_host = not is_pbs_host()
     try:
         def _startup_emit_pending_app_updates():
             time.sleep(15)  # let channels bind + first metrics collect
@@ -23346,16 +23351,18 @@ if __name__ == '__main__':
             except Exception as e:
                 print(f"[ProxMenux] startup emit_all_pending_updates failed: {e}",
                       file=sys.stderr, flush=True)
-        threading.Thread(target=_startup_emit_pending_app_updates, daemon=True,
-                         name='app-updates-startup-emit').start()
+        if pve_host:
+            threading.Thread(target=_startup_emit_pending_app_updates, daemon=True,
+                             name='app-updates-startup-emit').start()
     except Exception as e:
         print(f"[ProxMenux] app-updates startup emitter failed to arm: {e}")
 
     # Prewarm only the Overview's default day range; other ranges are lazy.
     try:
-        metrics_thread = threading.Thread(target=_node_metrics_prewarmer_loop, daemon=True, name='node-metrics-prewarmer')
-        metrics_thread.start()
-        print("[ProxMenux] Node-metrics prewarmer started (day range, 90s interval)")
+        if pve_host:
+            metrics_thread = threading.Thread(target=_node_metrics_prewarmer_loop, daemon=True, name='node-metrics-prewarmer')
+            metrics_thread.start()
+            print("[ProxMenux] Node-metrics prewarmer started (day range, 90s interval)")
     except Exception as e:
         print(f"[ProxMenux] Node-metrics prewarmer failed to start: {e}")
 
@@ -23366,9 +23373,10 @@ if __name__ == '__main__':
     # after the tab has been closed for minutes. The React-side
     # prefetcher only ran while the page was open.
     try:
-        vm_modal_thread = threading.Thread(target=_vm_modal_prewarmer_loop, daemon=True, name='vm-modal-prewarmer')
-        vm_modal_thread.start()
-        print("[ProxMenux] VM-modal prewarmer started (one-shot warm-up; caches refreshed by event invalidation only)")
+        if pve_host:
+            vm_modal_thread = threading.Thread(target=_vm_modal_prewarmer_loop, daemon=True, name='vm-modal-prewarmer')
+            vm_modal_thread.start()
+            print("[ProxMenux] VM-modal prewarmer started (one-shot warm-up; caches refreshed by event invalidation only)")
     except Exception as e:
         print(f"[ProxMenux] VM-modal prewarmer failed to start: {e}")
 
@@ -23392,8 +23400,9 @@ if __name__ == '__main__':
     # identical (backup, restart, /usr/bin/update + custom command
     # chain) between manual and scheduled invocations.
     try:
-        scheduler_thread = threading.Thread(target=_scheduler_loop, daemon=True)
-        scheduler_thread.start()
+        if pve_host:
+            scheduler_thread = threading.Thread(target=_scheduler_loop, daemon=True)
+            scheduler_thread.start()
     except Exception as e:
         print(f"[ProxMenux] LXC update scheduler failed to start: {e}")
 

AppImage/scripts/notification_events.py

@@ -3850,6 +3850,13 @@ class PollingCollector:
             return
         self._last_managed_check = now
 
+        try:
+            from pbs_manager import is_pbs_host
+            if is_pbs_host():
+                return  # a Proxmox Backup Server has no guests or integrations to track
+        except Exception:
+            pass
+
         try:
             import managed_installs
         except Exception: