diff --git a/client/public/version.js b/client/public/version.js
index 0edca3a..eb94ade 100644
--- a/client/public/version.js
+++ b/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 = "2026.02.28 R311";
+window.CHGRID_WEB_VERSION = "2026.02.28 R312";
 // Optional display timezone for timestamps. Falls back to America/Detroit if unset/invalid.
 window.CHGRID_TIME_ZONE = "America/Detroit";
diff --git a/client/src/main.ts b/client/src/main.ts
index d6c8524..d972d22 100644
--- a/client/src/main.ts
+++ b/client/src/main.ts
@@ -1551,7 +1551,7 @@ async function handleAuthResult(message: Extract<IncomingMessage, { type: 'auth_
   dom.authPassword.value = '';
   dom.registerPassword.value = '';
   dom.registerPasswordConfirm.value = '';
-  playSample(SYSTEM_SOUND_URLS.logon, 1);
+  void audio.playSample(SYSTEM_SOUND_URLS.logon, 1);
   setConnectionStatus('Authenticated. Joining world...');
 }