filter unavailable stickers/emojis in on_random. locked stickers and emojis were still in the guild lists, causing 50081 (cannot use this sticker) and 10014 (unknown emoji) errors and skipping the llm reply

bot.py

@@ -261,8 +261,9 @@ async def on_random(message) -> bool:
     # single weighted pick between sticker/emoji/media, used as a substitute for an actual
     # llm reply — only called once on_message already decided this message gets a response.
     # returns True if it fired (caller should skip the llm call), False if it should proceed normally.
-    stickers = list(message.guild.stickers)
-    emojis = [str(e) for e in message.guild.emojis]
+    # skip locked/role-restricted ones, discord rejects those (50081 / 10014)
+    stickers = [s for s in message.guild.stickers if s.available]
+    emojis = [str(e) for e in message.guild.emojis if e.available and not e.roles]
 
     options = []
     if stickers: