fix(discord): truncate thread titles by UTF-16 units + AUTHOR_MAP

Discord thread names share the same UTF-16 component budget as select
labels and buttons — route the sanitizers in gateway/run.py and the
adapter's rename_thread through utf16_len/_prefix_within_utf16_limit
instead of code-point slices. Adds rungmc357 to AUTHOR_MAP.

gateway/run.py

@@ -1761,8 +1761,10 @@ from gateway.platforms.base import (
     EphemeralReply,
     MessageEvent,
     MessageType,
+    _prefix_within_utf16_limit,
     _reply_anchor_for_event,
     merge_pending_message_event,
+    utf16_len,
 )
 from gateway.restart import (
     DEFAULT_GATEWAY_RESTART_DRAIN_TIMEOUT,
@@ -13328,12 +13330,17 @@ class GatewayRunner(GatewayAuthorizationMixin, GatewayKanbanWatchersMixin, Gatew
         )
 
     def _sanitize_discord_thread_title(self, title: str) -> str:
-        """Return a Discord-safe semantic thread title from a session title."""
+        """Return a Discord-safe semantic thread title from a session title.
+
+        Discord thread names are capped at 100 characters measured in UTF-16
+        code units (emoji count double), so truncate with the UTF-16 helpers
+        rather than Python code-point slices.
+        """
         cleaned = re.sub(r"\s+", " ", str(title or "")).strip()
         if not cleaned:
             return "Hermes Chat"
-        if len(cleaned) > 80:
-            cleaned = cleaned[:77].rstrip() + "..."
+        if utf16_len(cleaned) > 80:
+            cleaned = _prefix_within_utf16_limit(cleaned, 77).rstrip() + "..."
         return cleaned
 
     async def _rename_discord_auto_thread_for_session_title(

plugins/platforms/discord/adapter.py

@@ -5271,8 +5271,11 @@ class DiscordAdapter(BasePlatformAdapter):
         cleaned = re.sub(r"\s+", " ", str(name or "")).strip()
         if not cleaned:
             return False
-        if len(cleaned) > 80:
-            cleaned = cleaned[:77].rstrip() + "..."
+        # Discord thread names are budgeted in UTF-16 code units (emoji count
+        # double) — truncate with the UTF-16 helpers, not code-point slices.
+        from gateway.platforms.base import utf16_len, _prefix_within_utf16_limit
+        if utf16_len(cleaned) > 80:
+            cleaned = _prefix_within_utf16_limit(cleaned, 77).rstrip() + "..."
 
         try:
             thread = self._client.get_channel(thread_id_int)

scripts/release.py

@@ -290,6 +290,7 @@ AUTHOR_MAP = {
     "290859878+synapsesx@users.noreply.github.com": "synapsesx",
     "157689911+itsflownium@users.noreply.github.com": "itsflownium",
     "dirtyren@users.noreply.github.com": "dirtyren",
+    "210088133+rungmc357@users.noreply.github.com": "rungmc357",
     "florian.rutishauser@outlook.com": "flo1t",
     "fanyang@microsoft.com": "fanyangCS",
     "bigstar0920@gmail.com": "bigstar0920",