✨ feat(workspace): 增强连接管理与终端状态展示

- 为连接管理页补充多级标签树、列头排序和行级更多菜单
- 支持同一 SSH 连接打开多个终端并显示终端序号
- 补充状态监控的内存与磁盘详情字段

---
✨ feat(workspace): enhance connection management and terminal status visibility

- add multi-level tag tree, sortable columns, and row-level more menu
- support multiple terminals per SSH connection with terminal indices
- extend status monitor with memory and disk detail fields

packages/frontend/src/stores/session/actions/sessionActions.ts

@@ -21,6 +21,18 @@ const findConnectionInfo = (connectionId: number | string, connectionsStore: Ret
   return connectionsStore.connections.find(c => c.id === Number(connectionId));
 };
 
+const getNextTerminalIndex = (connectionId: string): number => {
+  let maxTerminalIndex = 0;
+
+  sessions.value.forEach((session) => {
+    if (session.connectionId === connectionId) {
+      maxTerminalIndex = Math.max(maxTerminalIndex, session.terminalIndex || 0);
+    }
+  });
+
+  return maxTerminalIndex + 1;
+};
+
 // --- Actions ---
 export const openNewSession = (
     connectionOrId: ConnectionInfo | number | string,
@@ -51,6 +63,7 @@ export const openNewSession = (
 
   const newSessionId = existingSessionId || generateSessionId();
   const dbConnId = String(connInfo.id); // connInfo is now guaranteed to be defined here
+  const terminalIndex = getNextTerminalIndex(dbConnId);
 
   // 1. 创建管理器实例
   const isResume = !!existingSessionId; // 如果提供了 existingSessionId，则为恢复流程
@@ -60,6 +73,7 @@ export const openNewSession = (
       sessionId: newSessionId,
       connectionId: dbConnId,
       connectionName: connInfo.name || connInfo.host,
+      terminalIndex,
       editorTabs: ref([]),
       activeEditorTabId: ref(null),
       commandInputContent: ref(''),
@@ -115,7 +129,7 @@ export const openNewSession = (
   newSessionsMap.set(newSessionId, newSession);
   sessions.value = newSessionsMap;
   activeSessionId.value = newSessionId;
-  console.log(`[SessionActions] 已创建新会话实例: ${newSessionId} for connection ${dbConnId}`);
+  console.log(`[SessionActions] 已创建新会话实例: ${newSessionId} for connection ${dbConnId} (terminal #${terminalIndex})`);
 
   // +++ 在连接前设置 ssh:connected 处理器以更新 sessionId +++
   const originalFrontendSessionIdForHandler = newSessionId; // 捕获初始ID给闭包
@@ -320,4 +334,4 @@ export const cleanupAllSessions = () => {
     sessions.value = newSessionsMap;
   }
   activeSessionId.value = null;
-};
+};