Use notify sound for reboot system messages

client/public/version.js

@@ -1,5 +1,5 @@
 // Maintainer-controlled web client version.
 // Format: YYYY.MM.DD Rn (example: 2026.02.20 R2)
-window.CHGRID_WEB_VERSION = "2026.02.27 R295";
+window.CHGRID_WEB_VERSION = "2026.02.27 R296";
 // Optional display timezone for timestamps. Falls back to America/Detroit if unset/invalid.
 window.CHGRID_TIME_ZONE = "America/Detroit";

client/src/main.ts

@@ -883,6 +883,9 @@ function classifySystemMessageSound(message: string): keyof typeof SYSTEM_SOUND_
   if (normalized.includes(' is now known as ') || normalized.startsWith('you are now known as ')) {
     return 'notify';
   }
+  if (normalized.startsWith('server rebooting in ') || normalized === 'server reboot already scheduled.') {
+    return 'notify';
+  }
   return null;
 }