- Configurable tier-based Auto Play with a saved user toggle.

Admin tier assignment without payment via Users > Edit > Tier Override.
Fixed live group membership refresh, polling, unread indicators, and 
incoming voice clip population.
Added asset cache busting so clients receive the fixes immediately.

api/messages.php

@@ -50,6 +50,9 @@ function sendTextMessage(): never {
         VALUES (?,?,?,?,?,?,?)")->execute([
             $user['id'], $groupId, $user['username'], $user['color'], $message, $created, dayKey(),
         ]);
+    if ($groupId !== null) {
+        $db->prepare("UPDATE chat_groups SET updated_at=? WHERE id=?")->execute([$created, $groupId]);
+    }
     trackEvent('message_text', '/api/messages.php', (int)$user['id']);
     jsonResponse(['success' => true, 'message' => messagePayload([
         'id' => $db->lastInsertId(), 'group_id' => $groupId, 'username' => $user['username'],
@@ -95,6 +98,9 @@ function sendVoiceMessage(): never {
                 $user['id'], $groupId, $user['username'], $user['color'], '[Voice clip]',
                 $filename, $storedMime, $duration, $created, dayKey(),
             ]);
+        if ($groupId !== null) {
+            $db->prepare("UPDATE chat_groups SET updated_at=? WHERE id=?")->execute([$created, $groupId]);
+        }
     } catch (Throwable $e) {
         deleteVoiceFile($filename);
         throw $e;
@@ -165,6 +171,7 @@ function pollMessages(): never {
         'messages' => array_map('messagePayload', $rows),
         'online' => (int)$onlineStmt->fetchColumn(),
         'recording' => $recording,
+        'groups' => userGroups((int)$user['id']),
         'group_id' => $groupId,
         'server_time' => time(),
     ]);