feat(session): 扩展 /info 命令显示更多 session 信息

新增：对话标题、模型名称、用户消息数/总消息数、创建时间、最后活跃时间

src/session/session.rs

@@ -771,9 +771,17 @@ impl SessionManager {
                     let session_guard = session.lock().await;
                     let message_count = session_guard.get_history().len();
                     let session_id_str = session_guard.session_id();
+                    let title = &session_guard.title;
+                    let model_name = &session_guard.provider_config.name;
+                    let created_at = chrono::DateTime::from_timestamp_millis(session_guard.created_at)
+                        .map(|dt| dt.format("%Y-%m-%d %H:%M:%S").to_string())
+                        .unwrap_or_default();
+                    let last_active_at = chrono::DateTime::from_timestamp_millis(session_guard.last_active_at)
+                        .map(|dt| dt.format("%Y-%m-%d %H:%M:%S").to_string())
+                        .unwrap_or_default();
                     Ok((None, format!(
-                        "Session ID: {}\nMessage count: {}",
+                        "对话标题: {}\nSession ID: {}\n模型: {}\n用户消息: {} / 总消息: {}\n创建时间: {}\n最后活跃: {}",
-                        session_id_str, message_count
+                        title, session_id_str, model_name, session_guard.message_count, message_count, created_at, last_active_at
                     )))
                 } else {
                     Ok((None, "No active session.".to_string()))