fix: make generate_status_info public and remove unused imports

Co-authored-by: aider (openai/andrew/openrouter/anthropic/claude-sonnet-4) <aider@aider.chat>

src/modes/server/common.rs

@@ -1,6 +1,6 @@
 use anyhow::Result;
 use axum::http::HeaderMap;
-use log::{info, warn};
+use log::info;
 use serde::{Deserialize, Serialize};
 use std::collections::HashMap;
 use std::path::PathBuf;