feat(config): add configurable default shutdown delay for shutdown actions

ts/cli/ups-handler.ts

@@ -10,7 +10,7 @@ import type { TProtocol } from '../protocol/types.ts';
 import type { INupstConfig, IUpsConfig } from '../daemon.ts';
 import type { IActionConfig } from '../actions/base-action.ts';
 import { ProxmoxAction } from '../actions/proxmox-action.ts';
-import { UPSD } from '../constants.ts';
+import { SHUTDOWN, UPSD } from '../constants.ts';
 
 /**
  * Thresholds configuration for CLI display
@@ -1152,11 +1152,19 @@ export class UpsHandler {
       if (typeValue === 1) {
         // Shutdown action
         action.type = 'shutdown';
+        const defaultShutdownDelay =
+          this.nupst.getDaemon().getConfig().defaultShutdownDelay ?? SHUTDOWN.DEFAULT_DELAY_MINUTES;
 
-        const delayInput = await prompt('Shutdown delay in minutes [5]: ');
-        const delay = parseInt(delayInput, 10);
-        if (delayInput.trim() && !isNaN(delay)) {
-          action.shutdownDelay = delay;
+        const delayInput = await prompt(
+          `Shutdown delay in minutes (leave empty for default ${defaultShutdownDelay}): `,
+        );
+        if (delayInput.trim()) {
+          const delay = parseInt(delayInput, 10);
+          if (isNaN(delay) || delay < 0) {
+            logger.warn('Invalid shutdown delay, using configured default');
+          } else {
+            action.shutdownDelay = delay;
+          }
         }
       } else if (typeValue === 2) {
         // Webhook action