fix: Fix TypeScript type errors in LogViewer and TabManager

- Fix NodeJS.Timeout type by using ReturnType<typeof setTimeout>
- Fix xterm theme selection property with type assertion
- Fix potential undefined array access in TabManager
- Add node types to tsconfig.app.json for type-check

Author: huangzheng2016

frontend/src/components/LogViewer.vue

@@ -46,7 +46,7 @@ let terminal: Terminal | null = null
 let fitAddon: FitAddon | null = null
 let searchAddon: SearchAddon | null = null
 let ws: WebSocket | null = null
-let reconnectTimer: NodeJS.Timeout | null = null
+let reconnectTimer: ReturnType<typeof setTimeout> | null = null
 const reconnectDelay = 3000 // 3秒后重连
 let isUserAtBottom = true // 用户是否在底部
 
@@ -147,7 +147,6 @@ const initTerminal = async () => {
       background: '#1e1e1e',
       foreground: '#ffffff',
       cursor: '#aeafad',
-      selection: '#3a3d41',
       black: '#000000',
       red: '#cd3131',
       green: '#0dbc79',
@@ -163,8 +162,9 @@ const initTerminal = async () => {
       brightBlue: '#3b8eea',
       brightMagenta: '#d670d6',
       brightCyan: '#29b8db',
-      brightWhite: '#ffffff'
-    },
+      brightWhite: '#ffffff',
+      selection: '#3a3d41'
+    } as any,
     scrollback: 10000, // 最多保留10000行历史记录，超过会自动清理旧内容
     disableStdin: false // 启用stdin以监听键盘事件
   })

frontend/src/components/TabManager.vue

@@ -299,7 +299,7 @@ const closeTab = (tabId: string) => {
         const actionListTab = tabs.value.find(tab => tab.type === 'action-list')
         if (actionListTab) {
           nextTabId = actionListTab.id
-        } else if (tabs.value.length > 0) {
+        } else if (tabs.value.length > 0 && tabs.value[0]) {
           // 如果定时计划也不存在（理论上不应该发生），则切换到第一个tab
           nextTabId = tabs.value[0].id
         }

frontend/tsconfig.app.json

@@ -8,6 +8,7 @@
     "paths": {
       "@/*": ["./src/*"]
     },
-    "moduleResolution":"Node"
+    "moduleResolution":"Node",
+    "types": ["node"]
   }
 }

frontend/tsconfig.json

@@ -19,6 +19,9 @@
       "ESNext",
       "DOM"
     ],
+    "types": [
+      "node"
+    ],
     "skipLibCheck": true,
     "noEmit": true
   },