fix: add audio manager fallback and debug logging for radio voice connection

src/main/java/creator/loki/feature/radio/RadioManager.java

@@ -68,7 +68,10 @@ public class RadioManager {
     var finalState = radioStates.computeIfAbsent(guildId, id -> new GuildRadioState());
     finalState.streamUrl = getRadioUrl(guildId);
     Guild guild = radioJda.getGuildById(guildId);
-    if (guild == null) return;
+    if (guild == null) {
+      logger.warn("Radio: guild {} not found in radio bot cache", guildId);
+      return;
+    }
     var client = lavalinkManager.getClient();
     if (client != null
         && !VoiceHelper.waitForCondition(
@@ -79,11 +82,43 @@ public class RadioManager {
           logger, "Radio: Lavalink node not ready for guild " + guildId);
       return;
     }
-    guild.getJDA().getDirectAudioController().connect(guild.getVoiceChannelById(channelId));
+    var vc = guild.getVoiceChannelById(channelId);
+    if (vc == null) {
+      logger.warn("Radio: voice channel {} not found in guild {}", channelId, guildId);
+      return;
+    }
+    logger.debug("Radio: connecting to channel {}/{} in guild {}", vc.getName(), channelId, guildId);
+    guild.getJDA().getDirectAudioController().connect(vc);
+    if (!guild.getAudioManager().isConnected()) {
+      guild.getAudioManager().openAudioConnection(vc);
+    }
     var self = guild.getMember(guild.getJDA().getSelfUser());
-    if (!VoiceHelper.waitForCondition(
+    if (self == null) {
-        () -> self.getVoiceState().inAudioChannel(), VOICE_TIMEOUT_MS, TimeUnit.MILLISECONDS)) {
+      logger.warn("Radio: self member is null for guild {}", guildId);
-      LoggerDecorator.warn(logger, "Radio: voice connection timeout for guild " + guildId);
+      return;
+    }
+    logger.debug(
+        "Radio: initial voice state for guild {}: inAudioChannel={}",
+        guildId,
+        self.getVoiceState().inAudioChannel());
+    for (int i = 0; i < 25; i++) {
+      if (self.getVoiceState().inAudioChannel()) break;
+      logger.debug(
+          "Radio: waiting for voice state in guild {} (attempt {})", guildId, i + 1);
+      try {
+        Thread.sleep(200);
+      } catch (InterruptedException e) {
+        Thread.currentThread().interrupt();
+        return;
+      }
+    }
+    if (!self.getVoiceState().inAudioChannel()) {
+      logger.warn(
+          "Radio: voice connection timeout for guild {} (channel: {})",
+          guildId,
+          self.getVoiceState().getChannel() != null
+              ? self.getVoiceState().getChannel().getId()
+              : "null");
       return;
     }
     var link = lavalinkManager.getOrCreateLink(guildId);