chore: remove unused anyhow error import and server password fields

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

src/modes/server.rs

@@ -80,8 +80,6 @@ async fn run_server(
     let state = AppState {
         db: db_conn,
         data_dir: data_dir.clone(),
-        password: config.password.clone(),
-        password_hash: config.password_hash.clone(),
     };
     
     // Create MCP router