optimize: Enhanced session command processing logic

src/i18n/messages/zh-CN.json

@@ -1724,7 +1724,7 @@
     },
     "commands": {
       "title": "内置指令",
-      "description": "消息渠道中可用的 Bot 指令。",
+      "description": "消息渠道中可用的 Bot 指令。群聊中需 @Bot 才会处理消息。",
       "prefixLabel": "指令前缀",
       "prefixDescription": "触发 Bot 指令的前缀，1-3 个非字母数字字符（默认 /）。",
       "prefixSaved": "指令前缀已保存。",
@@ -1735,13 +1735,11 @@
       "agentDesc": "选择 AI Agent",
       "taskDesc": "创建会话并执行任务",
       "sessionsDesc": "列出当前目录的活跃会话",
-      "resumeDesc": "恢复已有会话",
+      "resumeDesc": "最近会话 / 恢复指定会话",
       "cancelDesc": "取消当前任务",
       "approveDesc": "批准 Agent 权限请求",
       "denyDesc": "拒绝 Agent 权限请求",
-      "recentDesc": "最近 5 条会话",
       "searchDesc": "按关键词搜索会话",
-      "detailDesc": "会话详情",
       "todayDesc": "今日活动汇总",
       "statusDesc": "渠道连接状态",
       "helpDesc": "显示帮助"