diff --git a/src/views/AgentChat/utils/sessionUtils.js b/src/views/AgentChat/utils/sessionUtils.js
new file mode 100644
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+++ b/src/views/AgentChat/utils/sessionUtils.js
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+// src/views/AgentChat/utils/sessionUtils.js
+// 会话管理工具函数
+
+/**
+ * 按日期分组会话列表
+ *
+ * @param {Array} sessions - 会话列表
+ * @returns {Object} 分组后的会话对象 { today, yesterday, thisWeek, older }
+ *
+ * @example
+ * const groups = groupSessionsByDate(sessions);
+ * console.log(groups.today); // 今天的会话
+ * console.log(groups.yesterday); // 昨天的会话
+ */
+export const groupSessionsByDate = (sessions) => {
+  const today = new Date();
+  const yesterday = new Date(today);
+  yesterday.setDate(yesterday.getDate() - 1);
+  const weekAgo = new Date(today);
+  weekAgo.setDate(weekAgo.getDate() - 7);
+
+  const groups = {
+    today: [],
+    yesterday: [],
+    thisWeek: [],
+    older: [],
+  };
+
+  sessions.forEach((session) => {
+    const sessionDate = new Date(session.created_at || session.timestamp);
+    const daysDiff = Math.floor((today - sessionDate) / (1000 * 60 * 60 * 24));
+
+    if (daysDiff === 0) {
+      groups.today.push(session);
+    } else if (daysDiff === 1) {
+      groups.yesterday.push(session);
+    } else if (daysDiff <= 7) {
+      groups.thisWeek.push(session);
+    } else {
+      groups.older.push(session);
+    }
+  });
+
+  return groups;
+};