fix: 3 fixes - camel-ai env var, Thai font, model_config_dict

1. Restore OPENAI_API_KEY/OPENAI_BASE_URL env vars for camel-ai factory check
   (keep api_key/base_url in model_config_dict for client constructor)
2. Add Thai-supporting font-family to .profile-realname
   (JetBrains Mono doesn't render Thai diacritics)
3. Keep model_config_dict with api_key and base_url for camel-ai client

backend/scripts/run_reddit_simulation.py

@@ -449,9 +449,16 @@ class RedditSimulationRunner:
         if not llm_model:
             llm_model = self.config.get("llm_model", "gpt-4o-mini")
         
+        # Set env vars for camel-ai factory check (required)
+        if llm_api_key:
+            os.environ["OPENAI_API_KEY"] = llm_api_key
+        
         if not llm_api_key:
             raise ValueError("LLM_API_KEY not configured. Set it in .env file.")
         
+        if llm_base_url:
+            os.environ["OPENAI_BASE_URL"] = llm_base_url
+        
         print(f"LLM配置: model={llm_model}, base_url={llm_base_url[:40] if llm_base_url else '默认'}...")
         
         # Pass api_key and base_url via model_config_dict