chore: cleanup

made llm get url from settings
cleanup uneceserry fstring

ref: N25B-207

src/control_backend/core/config.py

@@ -12,6 +12,10 @@ class AgentSettings(BaseModel):
     llm_agent_name: str = "llm_agent"
     test_agent_name: str = "test_agent"
 
+class LLMSettings(BaseModel):
+    local_llm_url: str = "http://127.0.0.1:1234/v1/chat/completions"
+    local_llm_model: str = "openai/gpt-oss-20b"
+
 class Settings(BaseSettings):
     app_title: str = "PepperPlus"
 
@@ -20,7 +24,11 @@ class Settings(BaseSettings):
     zmq_settings: ZMQSettings = ZMQSettings()
 
     agent_settings: AgentSettings = AgentSettings()
+
+    llm_settings: LLMSettings = LLMSettings()
     
     model_config = SettingsConfigDict(env_file=".env")
     
+
+
 settings = Settings()