fix: remove unused imports and dead code

Co-authored-by: aider (openai/andrew/openrouter/qwen/qwen3-coder) <aider@aider.chat>

src/modes/server/common.rs

@@ -33,7 +33,6 @@ pub struct AppState {
     pub db: Arc<Mutex<rusqlite::Connection>>,
     pub data_dir: PathBuf,
     pub password: Option<String>,
-    pub args: Arc<Args>,
 }
 
 #[derive(Serialize, Deserialize)]