fix: bypass no-reply for moderator bot handoff messages

- Add moderator bypass in before_model_resolve: if senderId equals moderatorUserId,
  skip no-reply evaluation to prevent moderator handoff messages from being treated
  as regular messages without 🔚
- Add debug log when bypass is triggered

plugin/index.ts

@@ -581,6 +581,18 @@ export default {
       const hasConvMarker = prompt.includes("Conversation info (untrusted metadata):");
       if (live.discordOnly !== false && (!hasConvMarker || derived.channel !== "discord")) return;
 
+      // Moderator bypass: if sender is the moderator bot, don't trigger no-reply
+      // This prevents moderator handoff messages from being treated as regular messages without 🔚
+      const moderatorUserId = getModeratorUserId(live);
+      if (moderatorUserId && derived.senderId === moderatorUserId) {
+        if (shouldDebugLog(live, derived.channelId)) {
+          api.logger.info(
+            `whispergate: moderator bypass for senderId=${derived.senderId}, skipping no-reply`,
+          );
+        }
+        return;
+      }
+
       let rec = sessionDecision.get(key);
       if (!rec || Date.now() - rec.createdAt > DECISION_TTL_MS) {
         if (rec) sessionDecision.delete(key);