fix(cat): use configured models instead of hardcoded strings

- switch_to_evil_personality now reads EVIL_TEXT_MODEL from globals
- switch_to_normal_personality now reads TEXT_MODEL from globals
- Removes desync risk when user changes models via Web UI

bot/utils/cat_client.py

@@ -829,15 +829,16 @@ class CatAdapter:
         else:
             logger.debug("evil_miku_personality already active, skipping toggle")
 
-        # Step 3: Switch LLM model to darkidol (the uncensored evil model)
-        if not await self.set_llm_model("darkidol"):
-            logger.error("Failed to switch Cat LLM to darkidol")
+        # Step 3: Switch LLM model to the configured evil model (e.g. darkidol)
+        evil_model = getattr(globals, "EVIL_TEXT_MODEL", "darkidol")
+        if not await self.set_llm_model(evil_model):
+            logger.error(f"Failed to switch Cat LLM to {evil_model}")
             success = False
 
         return success
 
     async def switch_to_normal_personality(self) -> bool:
-        """Disable evil_miku_personality, enable miku_personality, switch LLM to llama3.1.
+        """Disable evil_miku_personality, enable miku_personality, switch LLM to the configured normal model.
         
         Checks current plugin state first to avoid double-toggling.
         Returns True if all operations succeed, False if any fail.
@@ -865,9 +866,10 @@ class CatAdapter:
         else:
             logger.debug("miku_personality already active, skipping toggle")
 
-        # Step 3: Switch LLM model back to llama3.1 (normal model)
-        if not await self.set_llm_model("llama3.1"):
-            logger.error("Failed to switch Cat LLM to llama3.1")
+        # Step 3: Switch LLM model to the configured normal model (e.g. llama3.1)
+        normal_model = getattr(globals, "TEXT_MODEL", "llama3.1")
+        if not await self.set_llm_model(normal_model):
+            logger.error(f"Failed to switch Cat LLM to {normal_model}")
             success = False
 
         return success