Refactor PWA state management to simplify and streamline implementation

Co-authored-by: jxxghp <jxxghp@163.com>

src/main.ts

@@ -146,14 +146,9 @@ if (pwaStateController) {
 }
 
 // 6. 初始化后台优化工具
-console.log('初始化后台优化工具...')
-
-// 将后台管理器绑定到全局对象（便于调试）
 if (import.meta.env.MODE === 'development') {
   ;(window as any).backgroundManager = backgroundManager
   ;(window as any).sseManagerSingleton = sseManagerSingleton
-  
-  // 添加全局调试函数
   ;(window as any).debugBackground = () => {
     console.table(backgroundManager.getTimersInfo())
     console.log('Background Status:', backgroundManager.getStatus())
@@ -162,11 +157,9 @@ if (import.meta.env.MODE === 'development') {
 
 // 页面卸载时清理后台管理器
 window.addEventListener('beforeunload', () => {
-  console.log('应用卸载，清理后台资源...')
   backgroundManager.destroy()
   sseManagerSingleton.closeAllManagers()
   
-  // 清理PWA状态管理器
   if (pwaStateController) {
     pwaStateController.destroy()
   }